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  • Digitale Medien  (250.973)
  • Buch  (608)
  • Zeitschrift/Serie  (31)
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  • 1
    Digitale Medien
    Digitale Medien
    A measurement of τ polarization in Z^0 decays (1992-8977)
    Amsterdam : Elsevier
    Physics Letters B 294 (1992), S. 466-478 
    Details
    ISSN: 0370-2693
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0370-2693(92)91549-O
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  • 2
    Digitale Medien
    Digitale Medien
    Measurement of the average lifetime of b hadrons (1993-4325)
    Amsterdam : Elsevier
    Physics Letters B 317 (1993), S. 474-484 
    Details
    ISSN: 0370-2693
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0370-2693(93)91027-K
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  • 3
    Buch
    Buch
    ¬Das¬ Swift-Handbuch : Apps programmieren für macOS, iOS, watchOS und tvOS (2019)
    Details
    Titel: ¬Das¬ Swift-Handbuch : Apps programmieren für macOS, iOS, watchOS und tvOS
    Autor: Sillmann, Thomas
    Erscheinungsjahr: 2019
    Seiten: 1272 S.
    ISBN: 978-3-446-45505-4
    Materialart: Buch
    Sprache: Deutsch
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  • 4
    Buch
    Buch
    Basiswissen Vergaberecht : Ein Leitfaden für Ausbildung und Praxis (2019)
    Köln :Reguvis Fachmedien,
    Details
    Titel: Basiswissen Vergaberecht : Ein Leitfaden für Ausbildung und Praxis
    Autor: Rechten, Stephan
    Beteiligte Person(en): Röbke, Marc , Kokew, Christian
    Ausgabe: 3., aktualisierte Auflage
    Verlag: Köln :Reguvis Fachmedien,
    Erscheinungsjahr: 2019
    Seiten: 350 Seiten
    Serie: Praxisratgeber Vergaberecht
    ISBN: 978-3-8462-1043-7
    Materialart: Buch
    Sprache: Deutsch
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  • 5
    Buch
    Buch
    Applied stochastic analysis : E. Weinan, Tiejun Li, Eric Vanden-Eijnden; 199 (2019)
    American Mathematical Society,
    Details
    Titel: Applied stochastic analysis : E. Weinan, Tiejun Li, Eric Vanden-Eijnden; 199
    Autor: E.Weinan
    Beteiligte Person(en): Li, Tiejun , Vanden-Eijnden, Eric
    Verlag: American Mathematical Society,
    Erscheinungsjahr: 2019
    Seiten: 305 S.
    Serie: Graduate studies in mathematics 199
    ISBN: 978-1-4704-4933-9
    Materialart: Buch
    Sprache: Englisch
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  • 6
    Buch
    Buch
    Die digitale Transformation in Institutionen des kulturellen Gedächtnisses / (2019)
    Details
    Titel: Die digitale Transformation in Institutionen des kulturellen Gedächtnisses /
    Autor: Büttner, Stephan
    Erscheinungsjahr: 2019
    Seiten: 300 Seiten
    ISBN: 978-3-945610-50-3 , 3-945610-50-8
    Materialart: Buch
    Sprache: Deutsch
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  • 7
    Buch
    Buch
    Das erweiterte Museum : Medien, Technologien und Internet; 19 (2019)
    Details
    Titel: Das erweiterte Museum : Medien, Technologien und Internet; 19
    Autor: Franken-Wendelstorf, Regina [Herausgeber]
    Beteiligte Person(en): Greisinger, Sybille [Herausgeber] , Pellengahr, Astrid [Herausgeber]
    Ausgabe: 1. Auflage
    Erscheinungsjahr: 2019
    Seiten: 120 Seiten : , mit 50 farbigen Abbildungen
    Serie: MuseumsBausteine 19
    ISBN: 978-3-422-07436-1
    Materialart: Buch
    Sprache: Deutsch
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  • 8
    Buch
    Buch
    Click Here to Kill Everybody : Sicherheitsrisiko Internet und die Verantwortung von Unternehmen und Regierungen (2019)
    Details
    Titel: Click Here to Kill Everybody : Sicherheitsrisiko Internet und die Verantwortung von Unternehmen und Regierungen
    Autor: Schneier, Bruce
    Beteiligte Person(en): Lorenzen, Knut [Übersetzer]
    Erscheinungsjahr: 2019
    Seiten: 383 Seiten
    ISBN: 978-3-95845-947-2
    Materialart: Buch
    Sprache: Deutsch
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  • 9
    Buch
    Buch
    VOB Vergabe- und Vertragsordnung für Bauleistungen : Teil A (DIN 1960), Teil B (DIN 1961), Teil C (ATV) (2019)
    Berlin :Beuth-Verlag,
    Details
    Titel: VOB Vergabe- und Vertragsordnung für Bauleistungen : Teil A (DIN 1960), Teil B (DIN 1961), Teil C (ATV)
    Ausgabe: Ausgabe 2019
    Verlag: Berlin :Beuth-Verlag,
    Erscheinungsjahr: 2019
    Seiten: XVI, 8, 1123 Seiten
    Materialart: Buch
    Sprache: Unbestimmte Sprache
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  • 10
    Buch
    Buch
    Der Social-Media-Zyklus : Schritt für Schritt zum systematischen Social-Media-Management im Unternehmen (2019)
    Details
    Titel: Der Social-Media-Zyklus : Schritt für Schritt zum systematischen Social-Media-Management im Unternehmen
    Autor: Decker, Alexander
    Erscheinungsjahr: 2019
    Seiten: XXI, 573 Seiten : , Illustrationen, Diagramme ; , 24 cm x 16.8 cm
    ISBN: 978-3-658-22872-9
    Materialart: Buch
    Sprache: Deutsch
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  • 11
    Buch
    Buch
    Numerische Mathematik I : eine algorithmisch orientierte Einführung (2019)
    Berlin u.a. :de Gruyter,
    Details
    Titel: Numerische Mathematik I : eine algorithmisch orientierte Einführung
    Autor: Deuflhard, Peter
    Beteiligte Person(en): Hohmann, Andreas
    Ausgabe: 5. Aufl.
    Verlag: Berlin u.a. :de Gruyter,
    Erscheinungsjahr: 2019
    Seiten: XII, 348 Seiten
    Serie: Numerische Mathematik
    Materialart: Buch
    URL: http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=2012085&site=ehost-live
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  • 12
    Buch
    Buch
    Personalvertretungsgesetz Berlin : Basiskommentar mit Wahlordnung und ergänzenden Vorschriften (2019)
    Köln :Bund-Verlag,
    Details
    Titel: Personalvertretungsgesetz Berlin : Basiskommentar mit Wahlordnung und ergänzenden Vorschriften
    Autor: Daniels, Wolfgang
    Beteiligte Person(en): Kunze, Sandra , Pätzel, Enrico , Witt, Marko
    Ausgabe: 4., überarbeitete und aktualisierte Auflage
    Verlag: Köln :Bund-Verlag,
    Erscheinungsjahr: 2019
    Seiten: 541 Seiten
    ISBN: 978-3-7663-6891-1
    Materialart: Buch
    Sprache: Deutsch
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  • 13
    Buch
    Buch
    ¬The¬ OpenMP common core : making OpenMP simple again (2019)
    Cambridge, Massachusetts :MIT Press,
    Details
    Titel: ¬The¬ OpenMP common core : making OpenMP simple again
    Autor: Mattson, Timothy G.
    Beteiligte Person(en): He, Yun , Koniges, Alice Evelyn
    Verlag: Cambridge, Massachusetts :MIT Press,
    Erscheinungsjahr: 2019
    Seiten: 320 Seiten
    ISBN: 978-0-262-53886-2
    Materialart: Buch
    Sprache: Englisch
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  • 14
    Buch
    Buch
    Maschinelles Lernen : Grundlagen und Algorithmen in Python (2019)
    Details
    Titel: Maschinelles Lernen : Grundlagen und Algorithmen in Python
    Autor: Frochte, Jörg
    Ausgabe: 2., aktualisierte Auflage
    Erscheinungsjahr: 2019
    Seiten: 406 Seiten : , Illustrationen, Diagramme
    ISBN: 978-3-446-45996-0
    Materialart: Buch
    Sprache: Deutsch
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  • 15
    Buch
    Buch
    Schutz durch DIN VDE : Lehrbuch zu den Lernfeldern: Elektrische Installationen planen und ausführen, Elektroenergieversorgung und Sicherheit von Betriebsmitteln gewährleisten (2019)
    Details
    Titel: Schutz durch DIN VDE : Lehrbuch zu den Lernfeldern: Elektrische Installationen planen und ausführen, Elektroenergieversorgung und Sicherheit von Betriebsmitteln gewährleisten
    Autor: Fritsche, Hartmut
    Beteiligte Person(en): Häberle, Gregor , Häberle, Verena
    Ausgabe: 19. völlig überarbeitete und erweiterte Auflage
    Erscheinungsjahr: 2019
    Seiten: 360 S. +
    Serie: Europa-Fachbuchreihe für elektronische, mechatronische und informationstechnische Berufe
    ISBN: 978-3-8085-3728-2
    Materialart: Buch
    Sprache: Deutsch
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  • 16
    Buch
    Buch
    Energy-Efficient Computing and Data Centers / (2019)
    Wiley & Sons Ltd,
    Details
    Titel: Energy-Efficient Computing and Data Centers /
    Autor: Brochard, Luigi
    Beteiligte Person(en): Kamath, Vinod , Corbalan, Julita
    Ausgabe: 1. Aufl.
    Verlag: Wiley & Sons Ltd,
    Erscheinungsjahr: 2019
    Seiten: 234 Seiten
    ISBN: 978-1-78630-185-7
    Materialart: Buch
    Sprache: Englisch
    URL: http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=2226921&site=ehost-live
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  • 17
    Buch
    Buch
    Introductory econometrics : a modern approach (2019)
    Beazil ; Mexico ; Singapore :Cengage Learning,
    Details
    Titel: Introductory econometrics : a modern approach
    Autor: Wooldridge, Jeffrey M.
    Ausgabe: 7th edition
    Verlag: Beazil ; Mexico ; Singapore :Cengage Learning,
    Erscheinungsjahr: 2019
    Seiten: XXII, 826 Seiten
    ISBN: 978-0-357-90016-1
    Materialart: Buch
    Sprache: Englisch
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  • 18
    Buch
    Buch
    ¬Die¬ Verwendung von TurboCAD in technischen Berufen : zur Erstellung von technischen Zeichnungen und Konstruktionen für Zeichner, Techniker und Ingebie´ure (2019)
    Norderstedt :BoD - Books on Demand,
    Details
    Titel: ¬Die¬ Verwendung von TurboCAD in technischen Berufen : zur Erstellung von technischen Zeichnungen und Konstruktionen für Zeichner, Techniker und Ingebie´ure
    Autor: Bosse, Matthias
    Ausgabe: 3. Aufl.
    Verlag: Norderstedt :BoD - Books on Demand,
    Erscheinungsjahr: 2019
    Seiten: 284 S.
    ISBN: 978-3-7460-1226-1
    Materialart: Buch
    Sprache: Deutsch
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  • 19
    Buch
    Buch
    Linux-Server : das umfassende Handbuch (2019)
    Details
    Titel: Linux-Server : das umfassende Handbuch
    Autor: Deimeke, Dirk
    Beteiligte Person(en): Kania, Stefan , Soest, Daniel van , Heinlein, Peer , Miesen, Axel
    Ausgabe: 5., aktualisierte und erweiterte Auflage
    Erscheinungsjahr: 2019
    Seiten: 1270 Seiten : , Illustrationen ; , 24 cm x 19 cm
    ISBN: 978-3-8362-6092-3 , 3-8362-6092-1
    Materialart: Buch
    Sprache: Deutsch
    URL: Inhaltstext
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  • 20
    Buch
    Buch
    Parallel Computing Hits the Power Wall : Principles, Challenges, and a Survey of Solutions (2019)
    Basel u.a. :Springer,
    Details
    Titel: Parallel Computing Hits the Power Wall : Principles, Challenges, and a Survey of Solutions
    Autor: Lorenzon, Arthur Francisco
    Beteiligte Person(en): Beck Filho, Antonio Carlos Schneider
    Verlag: Basel u.a. :Springer,
    Erscheinungsjahr: 2019
    ISBN: 9783030287191
    Materialart: Buch
    Sprache: Deutsch
    URL: http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=2289471&site=ehost-live
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  • 21
    Buch
    Buch
    c't wissen DSGVO : Was 2019 wirklich wichtig ist (2019)
    Details
    Titel: c't wissen DSGVO : Was 2019 wirklich wichtig ist
    Autor: c't-Redaktion
    Erscheinungsjahr: 2019
    ISBN: 978-3-95788-223-3
    Materialart: Buch
    Sprache: Deutsch
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  • 22
    Buch
    Buch
    Deep Learning Kochbuch : Praxisrezepte für einen schnellen Einstieg (2019)
    Details
    Titel: Deep Learning Kochbuch : Praxisrezepte für einen schnellen Einstieg
    Autor: Osinga, Douwe
    Ausgabe: 1. Auflage
    Erscheinungsjahr: 2019
    Seiten: XVI, 244 Seiten
    ISBN: ISBN 978-3-96009-097-7
    Materialart: Buch
    Sprache: Deutsch
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  • 23
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    Buch
    Reviews in computational chemistry; 31 (2019)
    Details
    Titel: Reviews in computational chemistry; 31
    Erscheinungsjahr: 2019
    Seiten: XXVII, 336 S.
    Serie: Reviews in computational chemistry 31
    Materialart: Buch
    Sprache: Englisch
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  • 24
    Buch
    Buch
    TV-L Kommentar 2019 : Jahrbuch zum Tarifvertrag der Länder mit allen wichtigen Tariftexten und den Entgeltordnungen (2019)
    Details
    Titel: TV-L Kommentar 2019 : Jahrbuch zum Tarifvertrag der Länder mit allen wichtigen Tariftexten und den Entgeltordnungen
    Autor: Effertz, Jörg
    Ausgabe: 1. Aufl.
    Erscheinungsjahr: 2019
    Seiten: 1500 S.
    Serie: Wissen für die Praxis
    ISBN: 978-3-8029-7925-5
    Materialart: Buch
    Sprache: Deutsch
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  • 25
    Buch
    Buch
    Eingruppierung TVöD-Bund in der Praxis : die neue Entgeltordnung: Verwaltung, körperliche/handwerkliche Tätigkeiten (2019)
    Details
    Titel: Eingruppierung TVöD-Bund in der Praxis : die neue Entgeltordnung: Verwaltung, körperliche/handwerkliche Tätigkeiten
    Autor: Richter, Achim
    Beteiligte Person(en): Gamisch, Annett , Mohr, Thomas
    Ausgabe: 2. Aufl.
    Erscheinungsjahr: 2019
    Seiten: 190 S.
    Serie: Wissen für die Praxis
    ISBN: 978-3-8029-1597-0
    Materialart: Buch
    Sprache: Deutsch
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  • 26
    Buch
    Buch
    Tätigkeitsbewertung nach TVöD und TV-L : Eingruppierung, Bewertungsverfahren, Stellenbeschreibung, Arbeitshilfen (2019)
    Details
    Titel: Tätigkeitsbewertung nach TVöD und TV-L : Eingruppierung, Bewertungsverfahren, Stellenbeschreibung, Arbeitshilfen
    Autor: Kaufung, Harald
    Ausgabe: 3. Aufl.
    Erscheinungsjahr: 2019
    Seiten: 88 Seiten : , Illustrationen
    ISBN: 978-3-415-06464-5
    Materialart: Buch
    Sprache: Deutsch
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  • 27
    Buch
    Buch
    Urlaubsrecht : Basiskommentar zum BUrlG und zu anderen urlaubsrechtlichen Vorschriften (2019)
    Details
    Titel: Urlaubsrecht : Basiskommentar zum BUrlG und zu anderen urlaubsrechtlichen Vorschriften
    Autor: Heilmann, Joachim
    Ausgabe: 6., aktualisierte und überarbeitete Auflage
    Erscheinungsjahr: 2019
    Seiten: 403 Seiten
    ISBN: 978-3-7663-6871-3
    Materialart: Buch
    Sprache: Deutsch
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  • 28
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    Buch
    Riemannian geometric statistics in medical image analysis : (to appear) (2019)
    Amsterdam :Elsevier / Academic Press,
    Details
    Titel: Riemannian geometric statistics in medical image analysis : (to appear)
    Autor: Pennec, Xavier
    Verlag: Amsterdam :Elsevier / Academic Press,
    Erscheinungsjahr: 2019
    Seiten: 550 S.
    ISBN: 978-0-12-814725-2
    Materialart: Buch
    Sprache: Englisch
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  • 29
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    Buch
    Beck'scher Bilanz-Kommentar : Handels- und Steuerbilanz, §§ 238 bis 339, 342 bis 342e HGB (2019)
    Details
    Titel: Beck'scher Bilanz-Kommentar : Handels- und Steuerbilanz, §§ 238 bis 339, 342 bis 342e HGB
    Ausgabe: 12. Auflage
    Erscheinungsjahr: 2019
    Seiten: LVIII, 3000 Seiten
    ISBN: 978-3-406-73388-8
    Materialart: Buch
    Sprache: Deutsch
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  • 30
    Buch
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    Umsatzsteuerrecht : Umsatzsteuergesetz mit Umsatzsteuer-Durchführungsverordnung, Umsatzsteuer-Anwendungserlass, Mehrwertsteuer-Systemrichtlinie, EU-Verordnung 282/2011, EG-Richtlinie 2008/9/EG, 13. EG-Richtlinie : Textausgabe mit ausführlichem Sachregister; 5546 (2019)
    Details
    Titel: Umsatzsteuerrecht : Umsatzsteuergesetz mit Umsatzsteuer-Durchführungsverordnung, Umsatzsteuer-Anwendungserlass, Mehrwertsteuer-Systemrichtlinie, EU-Verordnung 282/2011, EG-Richtlinie 2008/9/EG, 13. EG-Richtlinie : Textausgabe mit ausführlichem Sachregister; 5546
    Beteiligte Person(en): Wagner, Wilfried , Deutschland [Normerlassende Gebietskörperschaft]
    Ausgabe: 37., überarbeitete Auflage, Stand: 1. Februar 2019, Sonderausgabe
    Erscheinungsjahr: 2019
    Seiten: XV, 1302 Seiten
    Serie: dtv 5546
    ISBN: 978-3-423-05546-8
    Materialart: Buch
    Sprache: Deutsch
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  • 31
    Buch
    Buch
    SQL : der Grundkurs für Ausbildung und Praxis : mit Beispielen in MySQL/MariaDB, PostgreSQL und T-SQL (2019)
    Details
    Titel: SQL : der Grundkurs für Ausbildung und Praxis : mit Beispielen in MySQL/MariaDB, PostgreSQL und T-SQL
    Autor: Adams, Ralf
    Ausgabe: 3., aktualisierte Auflage
    Erscheinungsjahr: 2019
    Seiten: 490 S. : , Illustrationen, Diagramme
    ISBN: 978-3-446-46110-9
    Materialart: Buch
    Sprache: Deutsch
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  • 32
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    Processing, Analyzing and Learning of Images, Shapes, and Forms : Part 2; 20 (2019)
    Amsterdam :Elsevier, North-Holland,
    Details
    Titel: Processing, Analyzing and Learning of Images, Shapes, and Forms : Part 2; 20
    Autor: Kimmel, Ron
    Beteiligte Person(en): Tai, Xue-Cheng
    Verlag: Amsterdam :Elsevier, North-Holland,
    Erscheinungsjahr: 2019
    Seiten: XIX, 684 Seiten
    Serie: Handbook of numerical analysis 20
    ISBN: 978-0-444-64140-3
    Materialart: Buch
    Sprache: Englisch
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    Programmieren in TypeScript : Skalierbare JavaScript-Applikationen entwickeln (2019)
    Details
    Titel: Programmieren in TypeScript : Skalierbare JavaScript-Applikationen entwickeln
    Autor: Cherny, Boris
    Beteiligte Person(en): Lang, Jørgen W.
    Ausgabe: 2. Auflage
    Erscheinungsjahr: 2019
    Seiten: XVIII, 310 Seiten
    ISBN: 978-3-96009-122-6
    Materialart: Buch
    Sprache: Deutsch
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    Buch
    Einführung in Data Science : Grundprinzipien der Datenanalyse mit Python (2019)
    Details
    Titel: Einführung in Data Science : Grundprinzipien der Datenanalyse mit Python
    Beteiligte Person(en): Rother, Kristian , Demmig, Thomas
    Ausgabe: 2. Auflage
    Erscheinungsjahr: 2019
    Seiten: 432 Seiten
    ISBN: 978-3-96009-123-3
    Materialart: Buch
    Sprache: Deutsch
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    Buch
    Mathematical theory of scattering resonances; 200, 200 (2019)
    Providence, RI :American Mathematical Society,
    Details
    Titel: Mathematical theory of scattering resonances; 200, 200
    Autor: Dyatlov, Semyon
    Beteiligte Person(en): Zworski, Maciej
    Verlag: Providence, RI :American Mathematical Society,
    Erscheinungsjahr: 2019
    Seiten: XI, 634 S.
    Serie: Graduate studies in mathematics 200
    ISBN: 978-1-4704-4366-5
    Materialart: Buch
    Sprache: Englisch
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    CQRS : Command Query Responsibility Segregation (2019)
    Independently published,
    Details
    Titel: CQRS : Command Query Responsibility Segregation
    Autor: Kumar, Ajay
    Verlag: Independently published,
    Erscheinungsjahr: 2019
    Seiten: 212 S.
    ISBN: 978-1-7958-7477-9
    Materialart: Buch
    Sprache: Deutsch
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    Stationärmaschinen - Bandsäge / (2019)
    Details
    Titel: Stationärmaschinen - Bandsäge /
    Autor: Henn, Guido
    Ausgabe: 1. Auflage
    Erscheinungsjahr: 2019
    Seiten: 186 Seiten : , Illustrationen +
    Serie: Werkstattwissen für Holzwerker
    ISBN: 978-3-7486-0194-4 , 3-7486-0194-8
    Materialart: Buch
    Sprache: Deutsch
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  • 38
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    Computing : archives for informatics and numerical computation; Supplementum (1977-2003)
    Wien [u.a.] :Springer, ; 1.1977 - 16.2003; damit Ersch. eingest.
    Details
    Titel: Computing : archives for informatics and numerical computation; Supplementum
    Verlag: Wien [u.a.] :Springer,
    Erscheinungsjahr: 1977-2003
    Erscheinungsverlauf: 1.1977 - 16.2003; damit Ersch. eingest.
    Materialart: Buch
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  • 39
    Zeitschrift/Serie
    Zeitschrift/Serie
    SIGBIO newsletter / (ab 1969-2001)
    New York, NY :ACM, ; 1.1969 - 7.1975/76; N.S. 1.1976 - 21.2001,1; damit Ersch. eingest.
    Details
    Titel: SIGBIO newsletter /
    Autor: Association for Computing Machinery / Special Interest Group on Biomedical Computing
    Verlag: New York, NY :ACM,
    Erscheinungsjahr: 1969-2001
    Erscheinungsverlauf: 1.1969 - 7.1975/76; N.S. 1.1976 - 21.2001,1; damit Ersch. eingest.
    ISSN: 0163-5697
    Materialart: Zeitschrift/Serie
    Sprache: Unbestimmte Sprache
    Paralleltitel: Internetausg. ---〉:Biomedical computing
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  • 40
    Zeitschrift/Serie
    Zeitschrift/Serie
    IEEE concurrency / (ab 1997-2000)
    Los Alamitos, Calif. :Soc., ; 5.1997 - 8.2000; damit Ersch. eingest.
    Details
    Titel: IEEE concurrency /
    Autor: Institute of Electrical and Electronics Engineers / Computer Group
    Verlag: Los Alamitos, Calif. :Soc.,
    Erscheinungsjahr: 1997-2000
    Erscheinungsverlauf: 5.1997 - 8.2000; damit Ersch. eingest.
    ISSN: 1092-3063
    Materialart: Zeitschrift/Serie
    Sprache: Unbestimmte Sprache
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  • 41
    Zeitschrift/Serie
    Zeitschrift/Serie
    ¬The¬ journal of logic programming (ab 1984-2000)
    New York, NY :North-Holland, ; 1.1984 - 46.2000
    Details
    Titel: ¬The¬ journal of logic programming
    Verlag: New York, NY :North-Holland,
    Erscheinungsjahr: 1984-2000
    Erscheinungsverlauf: 1.1984 - 46.2000
    ISSN: 0743-1066
    Materialart: Zeitschrift/Serie
    Sprache: Unbestimmte Sprache
    Nachfolgender Titel: Forts. ---〉:¬The¬ journal of logic and algebraic programming
    Paralleltitel: Internetausg. ---〉:¬The¬ journal of logic and algebraic programming
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  • 42
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    Computer personnel : a quarterly publ. of the Special Interest Group on Computer Personnel Research, SIGCPR (1971-1999)
    New York, NY :ACM, ; Nachgewiesen 2.1971 - 20.1999,4; damit Ersch. eingest.
    Details
    Titel: Computer personnel : a quarterly publ. of the Special Interest Group on Computer Personnel Research, SIGCPR
    Verlag: New York, NY :ACM,
    Erscheinungsjahr: 1971-1999
    Erscheinungsverlauf: Nachgewiesen 2.1971 - 20.1999,4; damit Ersch. eingest.
    ISSN: 0160-2497
    Materialart: Buch
    Paralleltitel: Internetausg. ---〉:Computer personnel
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  • 43
    Zeitschrift/Serie
    Zeitschrift/Serie
    CWI quarterly (ab 1988-1999)
    Amsterdam :CWI, ; 1.1988 - 12.1999; damit Ersch. eingest.
    Details
    Titel: CWI quarterly
    Autor: Centrum voor Wiskunde en Informatica 〈Amsterdam〉
    Verlag: Amsterdam :CWI,
    Erscheinungsjahr: 1988-1999
    Erscheinungsverlauf: 1.1988 - 12.1999; damit Ersch. eingest.
    ISSN: 0168-826X , 0922-5366
    Materialart: Zeitschrift/Serie
    Sprache: Unbestimmte Sprache
    Vorheriger Titel: Vorg. ---〉:Centrum voor Wiskunde en Informatica 〈Amsterdam〉: CWI newsletter
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  • 44
    Zeitschrift/Serie
    Zeitschrift/Serie
    Computer networks and ISDN systems : the international journal of computer and telecommunications networking (ab 1985-1998)
    Amsterdam [u.a.] :Elsevier [u.a.], ; 9.1985 - 30.1998
    Details
    Titel: Computer networks and ISDN systems : the international journal of computer and telecommunications networking
    Verlag: Amsterdam [u.a.] :Elsevier [u.a.],
    Erscheinungsjahr: 1985-1998
    Erscheinungsverlauf: 9.1985 - 30.1998
    ISSN: 0169-7552 , 0376-5075
    Materialart: Zeitschrift/Serie
    Sprache: Unbestimmte Sprache
    Nachfolgender Titel: Vorg. u. Forts. ---〉:Computer networks
    Anmerkung: Computer networks for research in Europe
    Suppl.: In 14,1=15 von:Networkshop: Conference report
    Suppl.: 16,1/2=4; 17,4/5=5 von:European Networkshop: European Networkshop
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  • 45
    Zeitschrift/Serie
    Zeitschrift/Serie
    SIGART bulletin : a quarterly publ. of the Special Interest Group on Artificial Intelligence (ab 1990-1998)
    New York, NY :ACM, ; 1.1990 - 9.1998
    Details
    Titel: SIGART bulletin : a quarterly publ. of the Special Interest Group on Artificial Intelligence
    Autor: Association for Computing Machinery / Special Interest Group on Artificial Intelligence
    Verlag: New York, NY :ACM,
    Erscheinungsjahr: 1990-1998
    Erscheinungsverlauf: 1.1990 - 9.1998
    ISSN: 1053-4830
    Materialart: Zeitschrift/Serie
    Sprache: Unbestimmte Sprache
    Vorheriger Titel: Vorg. ---〉:Association for Computing Machinery / Special Interest Group on Artificial Intelligence: SIGART newsletter
    Nachfolgender Titel: Forts. ---〉:Intelligence
    Paralleltitel: Internetausg. ---〉:Artificial intelligence
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  • 46
    Zeitschrift/Serie
    Zeitschrift/Serie
    SIGNUM newsletter (ab 1969-1998)
    New York, NY :ACM, ; 4.1969 - 33.1998,2; damit Ersch. eingest
    Details
    Titel: SIGNUM newsletter
    Autor: Association for Computing Machinery / Special Interest Group on Numerical Mathematics
    Verlag: New York, NY :ACM,
    Erscheinungsjahr: 1969-1998
    Erscheinungsverlauf: 4.1969 - 33.1998,2; damit Ersch. eingest
    ISSN: 0163-5778
    Materialart: Zeitschrift/Serie
    Vorheriger Titel: Vorg. ---〉:Association for Computing Machinery / Special Interest Committee on Numerical Mathematics: SICNUM newsletter
    Suppl.: 16,3=3,2 von:Association for Computing Machinery / Technical Committee on Fortran: FORTEC forum
    Paralleltitel: Internetausg. ---〉:Numerical mathematics
    URL: Nur Table of Contents.
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  • 47
    Zeitschrift/Serie
    Zeitschrift/Serie
    Unix review : the publication for the Unix community (ab 1983-1998)
    San Francisco, Calif. :Miller Freeman, ; 1.1983 - 16.1998,3
    Details
    Titel: Unix review : the publication for the Unix community
    Verlag: San Francisco, Calif. :Miller Freeman,
    Erscheinungsjahr: 1983-1998
    Erscheinungsverlauf: 1.1983 - 16.1998,3
    ISSN: 0742-3136
    Materialart: Zeitschrift/Serie
    Sprache: Unbestimmte Sprache
    Nachfolgender Titel: Forts. ---〉:Unix review's performance computing
    Paralleltitel: Internetausg. ---〉:Unix review.com
    URL: Zugriff lizenzfrei
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  • 48
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    Computers in physics / (ab 1987-1998)
    Woodbury, NY :AIP, ; 1.1987,1(Nov./Dez.); 2.1988 - 12.1998
    Details
    Titel: Computers in physics /
    Beteiligte Person(en): American Institute of Physics
    Verlag: Woodbury, NY :AIP,
    Erscheinungsjahr: 1987-1998
    Erscheinungsverlauf: 1.1987,1(Nov./Dez.); 2.1988 - 12.1998
    ISSN: 0894-1866
    Materialart: Zeitschrift/Serie
    Sprache: Unbestimmte Sprache
    Nachfolgender Titel: Forts. ---〉:Computing in science & engineering
    URL: http://www.aip.org/cip/
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  • 49
    Digitale Medien
    Digitale Medien
    Exact order reduction method in mode conversion problems (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3129-3140 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The exact order reduction method solves the fourth-order system of equations from the Vlasov equations that describe mode conversion by breaking the solution into two steps. The first step is to find the numerical solutions of a pair of second-order equations for the fast waves and slow waves, respectively, which are easily obtained. The second step uses an associated integral equation to obtain the coupling between the fast and slow waves. Potential difficulties due to singularities in the kernel of the integral equations near the axis are resolved by altering the integration path. This allows accurate estimates for mode conversion efficiencies in realistic geometries as the integral equation is solved only in a narrow region near resonance, while the global fast wave solution of the reduced second-order equation covers the entire cross section. The method makes virtually no approximations except that it keeps only the lowest nontrivial order terms in the Larmor radius expansion. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872452
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  • 50
    Digitale Medien
    Digitale Medien
    Turbulization of nonlinear Langmuir oscillations in a cold plasma (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3200-3203 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: It is shown that the electric field of Langmuir oscillations in a cold plasma contains a component, independent of time, setting ions in motion. Using Lagrange variables, one-dimensional dynamics of plasma in respect to the interaction between electron oscillations and ion movement is investigated. As a consequence of this interaction, the crossing of electron trajectories occurs even at small amplitudes at time tc, i.e., one-dimensional turbulence appears in the system. The expression for tc is derived. In time tc ion displacements as well as ion energy are found to depend only on the electron–ion mass relationship. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872460
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  • 51
    Digitale Medien
    Digitale Medien
    The bootstrap current in a tokamak with electron cyclotron heating (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3211-3216 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The bootstrap current in a non-Maxwellian tokamak plasma with electron cyclotron heating is calculated. The calculation is exact in the limit of highly charged ions, where pitch-angle scattering dominates over quasilinear diffusion, and shows that the current is entirely determined by the pressure of the trapped electrons. If the ion charge is finite, the current is shown to consist of two terms: one driven by collisions, and one driven by the heating and losses. The former is calculated approximately by using a model collision operator, and is found to be determined by the distribution of trapped electrons alone; the latter is discussed qualitatively.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872462
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  • 52
    Digitale Medien
    Digitale Medien
    Anomalous width variations for ion acoustic rarefactive solitary waves in a warm ion plasma with two electron temperatures (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3204-3210 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Anomalous width–amplitude variations were observed in large amplitude rarefactive solitary waves which show increasing width with increasing amplitude, contrasting the usual reciprocal relation between the square of the width and the amplitude, beyond a certain value of the plasma parameters [S. S. Ghosh, K. K. Ghosh, and A. N. Sekar Iyengar, Phys. Plasmas, 3, 3939 (1996)]. For the limiting maximum amplitude, the "increasing width" solitary wave tends to a double layer-like solution. The overall variation was found to depend crucially on the specific parameter space. From a detailed investigation of the above behavior, a plausible physical explanation has been presented for such increases in the width. It is found that the ions' initial kinetic energies and the cold electron concentration within the perturbed region play a significant role in determining the observed width–amplitude variation. This contradicts the investigation of Sayal, Yadav, and Sharma [Phys. Scr. 47, 576 (1993)]. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872461
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  • 53
    Digitale Medien
    Digitale Medien
    Aspect ratio scaling of toroidal plasma equilibria and the tokamak bootstrap effect (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3254-3261 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The aspect ratio scaling of toroidal plasma equilibria is examined using a parametrization of an exact Solov'ev solution to the Grad–Shafranov equation in Boozer coordinates. The equilibrium analysis suggests that simultaneous enhancements in magnetohydrodynamic (MHD) stability and the bootstrap effect are possible in tight aspect ratio (A→1) tokamaks. The fundamental physical mechanism causing the enhancements is shown to be the natural increase of the MHD safety factor q in tight aspect ratio toroidal geometries. The results of the scaling model suggest that the lowest bootstrap current fractions are obtained in tokamaks with aspect ratios A(approximate)3. It is also shown that a tight aspect ratio bootstrapped tokamak can be a weakly paramagnetic device. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872410
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  • 54
    Digitale Medien
    Digitale Medien
    Resistive pressure gradient-driven turbulence at stellarator plasma edge (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3282-3292 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: High resolution calculations of resistive pressure gradient-driven turbulence for the plasma edge parameters of the Advanced Toroidal Facility (ATF) [J. F. Lyon et al., Fusion Technol. 10, 179 (1986)] electron cyclotron heated discharges give fluctuation levels, consistent with the experimental measurements. This turbulence model is also used to simulate the transition from the low confinement to the high confinement mode. The transition is triggered through the poloidal flow amplification induced by the Reynolds stress. After the transition, the confinement improvement is relatively low (30%–40%), even for unrealistically low poloidal viscosity. In the high confinement mode, the characteristic radial scale length of the poloidal flow in the three-dimensional calculations (separation between the lowest-n resonant surfaces) is different from the single helicity results (radial correlation length of the fluctuations). The simple criterion based on the ratio of shearing rate to the linear growth rate does not quantitatively account for the fluctuation reduction. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872469
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  • 55
    Digitale Medien
    Digitale Medien
    Extended neoclassical transport theory for incompressible tokamak plasmas (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3320-3322 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Conventional neoclassical transport theory is extended to include the effects of orbit squeezing, and to allow the effective poloidal Mach number UpM=[(V(parallel)/vt)+(VEB/vtBp)] of the order of unity for incompressible tokamak plasmas. Here, V(parallel) is the parallel mass flow, vt is the ion thermal speed, VE is the poloidal E×B drift speed, B is the magnetic field strength, and Bp is the poloidal magnetic field strength. It is found that ion thermal conductivity is reduced from its conventional neoclassical value in both banana and plateau regimes if UpM〉1 and S〉1. Here, S=[1+cI2Φ′′/(Ω0B0)] is the orbit squeezing factor with c the speed of light, I=RBt, R the major radius, Φ the electrostatic potential, B0 the magnetic field strength on the axis, Ω0=eB0/Mc, M the ion mass, e the ion charge, Φ′′=d2Φ/dψ2, and ψ the poloidal flux function. However, there is an irreducible minimum for the ion thermal conductivity in the banana-plateau regime set by the conventional Pfirsch–Schlüter transport. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872472
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  • 56
    Digitale Medien
    Digitale Medien
    Studies of instability and transport in sheared-slab plasmas with very weak magnetic shear (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3334-3340 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Ion temperature gradient (ITG or ηi) driven microinstabilities are studied, using kinetic theory, for tokamak plasmas with very weak (positive or negative) magnetic shear (VWS). The gradient of magnetic shear as well as the effects of parallel and perpendicular velocity shear (v(parallel)′ and vE′) are included in the defining equations. Two eigenmodes: the double (D) and the global (G) are found to coexist. Parametric dependence of these instabilities, and of the corresponding quasilinear transport is systematically analyzed. It is shown that, in VWS plasmas, a parallel velocity shear (PVS) may stabilize or destabilize the modes, depending on the individual as well as the relative signs of PVS and of the gradient of magnetic shear. The quasilinear transport induced by the instabilities may be significantly reduced with PVS in VWS plasmas. The vE′ values required to completely suppress the instabilities are much lower in VWS plasmas than they are in normal plasmas. Possible correlations with tokamak experiments are discussed. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872474
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  • 57
    Digitale Medien
    Digitale Medien
    Effect of a wiggler on two-stream instability (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3380-3381 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In a plasma-filled free electron laser two-stream instability is a serious consideration. The growth rate of the instability could be significantly reduced by coupling it to the electromagnetic modes/quasimodes through the wiggler. The effect is important near wiggler plasma resonance, where plasma frequency equals the product of wiggler wave number and beam velocity. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872478
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  • 58
    Digitale Medien
    Digitale Medien
    A high-efficiency free-electron laser-peniotron hybrid with a longitudinal wiggler magnetic field (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3390-3393 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Stimulated emission from the interaction of a cold, relativistic beam of electrons gyrating in a combined solenoidal and longitudinally polarized periodic wiggler magnetic field is considered as a source of high-efficiency and short-wavelength radiation. The analysis of electron motion in such a combined field shows the motion covers rich Fourier components. The first Fourier component, with the cyclotron frequency of ωc+kwv(parallel), has relatively large transverse velocity compared with the velocity of the motion. The study of the interaction of this Fourier component with the peniotron electromagnetic mode indicates that a high efficiency of 36% is obtained. Its working mechanism is explained and the influence of the wiggler field on the saturation efficiency is analyzed. The electron bunching in the transverse plane and the evolution of the efficiency with the interaction distance is given.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872480
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  • 59
    Digitale Medien
    Digitale Medien
    Fishbone mode excitation in the ion kinetic regime (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2785-2787 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: By solving the dispersion relation in the ion kinetic regime, it is found that the threshold of the plasma beta value for exciting the ion-fishbone mode is lowered. Thus, for most of the present-day tokamaks where the Bussac criterion [Bussac et al., Phys. Rev. Lett. 35, 1638 (1975)] is not satisfied, it will still be possible to excite the ion-fishbone mode. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872445
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  • 60
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    Digitale Medien
    Production of sheared flow during ion cyclotron resonance heating in tokamak plasmas (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2788-2790 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: An approach of producing the poloidal ion rotation by using ion cyclotron resonance heating (ICRH) is presented in core tokamak plasmas. The mechanism employed here is inducing a poloidal density inhomogeneity by rf cyclotron heating and then destabilizing the anomalous Stringer spin-up. A criterion for destabilization of the poloidal ion rotation in the presence of a rf wave is given, which depends on the ratio of the characteristic time of inhomogeneous density formation to the ion collision time. The numerical results have shown that the poloidal ion rotation can be destabilized in the present ICRH power level. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872446
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  • 61
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    Digitale Medien
    Rarefactive ion acoustic soliton excitation using a modulated high-frequency sinusoidal wave in a negative ion plasma (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2893-2898 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Experiments on the excitation of rarefactive ion acoustic solitons using a fine mesh grid in a negative ion plasma are described. The excitation is novel in that a modulated high-frequency sinusoidal wave voltage signal is applied to the grid. An interpretation of the velocity modulation and bunching of free-streaming ions that pass through the grid to which the signal is applied is given. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872420
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  • 62
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    Digitale Medien
    Description of turbulent transport in tokamaks by invariants (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2907-2919 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In general, turbulent transport drives a plasma toward a state of turbulent equipartition, in which Lagrangian invariants are uniformly distributed. Different invariants decay with different rates, and in tokamaks the frozen-in law of particles in the poloidal magnetic field survives longer than the corresponding law for the toroidal field, assuming that the trapped particles dominate the turbulent transport. Therefore, the plasma profiles depend on the safety factor q(r), and the condition for convection of trapped particles is that the shear dq/dr is positive. There are two ways to suppress this convection and thereby enhance confinement. The first one is to reverse the magnetic shear. The energy of typical trapped particles then increases outward instead of inward, which suppresses instabilities. The second method is to eliminate the trapped ions by poloidal rotation, and thereby create a transport barrier. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872422
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  • 63
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    Digitale Medien
    Studies of transport scaling and reduction under feedback (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2933-2939 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A feedback control system using an ion beam as a remote suppressor has been previously shown to be very effective in suppressing plasma instabilities in the Columbia Linear Machine [G. A. Navratil et al., Plasma Phys. 24, 184 (1982)]. The first experimental measurements for the effect of this feedback system on anomalous particle transport, as determined from the cross-correlation of density and potential fluctuations is presented. It is shown that feedback reduces transport due to a rotational E×B mode by up to a factor of 3 in this experiment. Also, it was found that particle transport scales linearly with fluctuation amplitude and feedback control does not alter this scaling. Last, the experimentally observed scaling of particle transport does not agree with any theoretical predictions. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872425
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  • 64
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    Digitale Medien
    Role of finite parallel wave number in low frequency fluctuations in toroidal current less plasma (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2955-2961 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In this paper we present results related to studies of low frequency electrostatic fluctuations in a toroidal plasma of varying length and without a toroidal current. The toroidal length of plasma is varied from fully toroidal (major radius R=45 cm) to 278, 212 and 142 cm. The characteristics of fluctuations changed, showing the effect of finite system length on the nature of the fluctuations. The major results are (1) a drastic reduction in the amplitude of fluctuations, (2) this reduction is mainly due to the disappearance of coherent peaks at 3 kHz and its harmonics observed in unbounded system, (3) the presence of a broad coherent feature around 10 kHz, only in bad curvature region, at low magnetic field (200 G) and (4) the appearance of a large number of coherent peaks, in one particular system length, at a higher magnetic field (400 G). These results indicate that the Rayleigh–Taylor instability with finite k|| may be excitable in the device. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872428
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  • 65
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    Digitale Medien
    Signatures of deuterium recombination in the DIII-D divertor (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2989-2996 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Thomson scattering measurements performed in the divertor of the DIII-D tokamak [Plasma Physics Controlled Nuclear Fusion Research, 1986 (International Atomic Energy Agency, Vienna, 1987), Vol. I, p. 159] during detached operation show that the electron temperatures are typically between 0.8 and 2.0 eV throughout a region which may extend several centimeters above the target plate. At such low temperatures the excitation of recycling deuterium atoms or impurities should be weak. Nevertheless, significant radiation is frequently detected in these locations. It has been suggested that recombination processes, which become important only below about 1.5 eV for deuterium, are responsible for the observed emission. This hypothesis has been investigated by comparing ratios of deuterium lines from attached and detached plasmas with theoretical ratios expected for ionizing or recombining conditions. The analysis of several discharges indicates that the mechanism for production of the emission changes from being collisional excitation of atomic deuterium to a mixture of collisional-radiative recombination and collisional excitation as plasmas evolve from attached to detached states. Localization of D-α emission to low-temperature regions using tangentially viewing camera data together with Thomson scattering results and measurements of deuterium atom temperatures are consistent with these conclusions. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872432
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  • 66
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    Digitale Medien
    High-intensity illumination of an exploding foil (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3006-3011 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In an experiment relevant to the fast ignitor fusion concept, a preformed plasma simulating the corona of a fusion target has been probed with laser intensities exceeding 1018 W/cm2. It is seen that the f number of the probe beam is increased as it propagates through the target plasma—a channeling of the power. The transmission and backscatter of the probe beam have been examined, and the analysis suggests anomalous absorption of laser light in shorter scale length plasmas. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872435
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  • 67
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    Digitale Medien
    Signatures of target performance and mixing in titanium-doped, laser-driven target implosions (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3021-3030 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Absorption-spectroscopy measurements using an embedded titanium layer have been performed on laser implosions of spherical shells. Predicted absorption features formed by the titanium layer were observed: absorption lines due to 1s–2p transitions in titanium ions of incomplete L shell, as well as K-edge absorption in cold titanium. Also observed were oscillations due to EXAFS (Extended X-Ray Absorption Fine Structure) above the Ti K edge. The core temperature and shell areal density and temperature are derived from the measurements and are found to fall short of the values predicted by one-dimensional code simulations. This shortfall is attributed to the lack of irradiation symmetry, which leads to hydrodynamic instability and mixing (smoothing by phase plates was not used in this experiment). Signatures of mixing include the emission of the He-α line of Ti+20 due to titanium migrating to the core, as well as the EXAFS spectrum indicating cold titanium close to peak compression.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872443
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  • 68
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    Digitale Medien
    Particle-in-cell (PIC) simulations of beam instabilities in gyrotrons (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3043-3048 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Extensive simulations are performed to investigate effects of electron cyclotron instabilities on the gyrotron beam quality, using two-dimensional axisymmetric particle-in-cell (PIC) codes. Both electrostatic and electromagnetic models, as well as realistic geometries of the gyrotron, are considered. It is found that a large beam density can lead to an electrostatic-instability-induced energy spread which substantially degrades the gyrotron efficiency. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872439
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  • 69
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    Digitale Medien
    Confinement of a neutral plasma using nested electric potential wells (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2313-2315 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A self-consistent, two-dimensional analysis is presented on confining a region of neutral plasma with a Penning/Malmberg type plasma trap using a nested well configuration. It is found that a neutral plasma region having disparate electron and ion temperatures or having high charge state ions can be confined with static fields. For confining a neutral region comprised of electrons and equal temperature low charge state ions, a quasistatic approach appears promising. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872404
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  • 70
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    Digitale Medien
    Linear stability of the collisionless, large Larmor radius Z-pinch (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2322-2330 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The Vlasov fluid model is used to study the m=0 and m=1 internal and free boundary modes in a collisionless, large Larmor radius Z pinch. Two methods (initial value and variational) are employed, and give good agreement. The growth rate can be reduced from its zero Larmor radius value by a factor of up to 10 for m=1, and up to 3 for m=0. Stability thresholds and the role of resonant ions are discussed. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872237
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  • 71
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    Digitale Medien
    Impulsive and transient excitation of Bohm–Gross waves in a dissipative plasma (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2336-2347 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Based on the resolution of the partial differential equation describing the external excitation of the Bohm–Gross longitudinal wave, analytical expressions for causal responses of a dissipative macroscopic plasma are derived. Both impulsive and harmonic solutions representing the spatial Green's functions of the radiation problem are given. These exact responses of the plasma, expressed in terms of two-variable Lommel functions, are then used to gain some better understanding of the excitation and dynamics of the well-known thermal wave. Special attention is paid to the resonant excitation case. Intrinsic characteristics of the secular behavior of the radiated signal are illustrated and analyzed. It is shown that the proffered algebraic solutions constitute a generalization of previous results inferred from an asymptotic representation of the Green's functions, or from the familiar steady state harmonic approach. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872239
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  • 72
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    Digitale Medien
    Ion acoustic soliton excitation using a modulated high-frequency sinusoidal wave (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2436-2442 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Experiments on the excitation of ion acoustic solitons using a fine mesh grid in a normal two component plasma are described. The excitation is novel in that a modulated high-frequency sinusoidal wave voltage signal is applied to the grid. The carrier frequency of the high-frequency sinusoidal wave is above the ion plasma frequency. An interpretation of the velocity modulation and bunching of free streaming ions that pass through the grid to which the signal is applied is given. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872224
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  • 73
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    Digitale Medien
    Numerical observation of turbulence enhanced growth rates (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2508-2518 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: An enhancement of the velocity diffusion over the quasilinear value is observed in the regime where the autocorrelation time is much smaller than the linear growth time or resonance broadening time. The diffusion enhancement occurs when the resonance broadening time is small compared with the linear growth time. These simulations are self consistent and have enough modes to be in the continuous spectrum limit. That is, even at the initial amplitudes the intermode spacing is sufficiently small that the resonance overlap parameter is large. A possible mechanism for the enhanced diffusion (spontaneous spectrum discretization) is discussed. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872230
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  • 74
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    Digitale Medien
    Radiative and three-body recombination in the Alcator C-Mod divertor (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2555-2566 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Significant recombination of the majority ion species has been observed in the divertor region of Alcator C-Mod [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] under detached conditions. This determination is made by analysis of the visible spectrum from the divertor, in particular the Balmer series line emission and the observed recombination continuum, including an apparent recombination edge at ∼375 nm. The analysis shows that the electron temperature in the recombining plasma is 0.8–1.5 eV. The measured volume recombination rate is comparable to the rate of ion collection at the divertor plates. The dominant recombination mechanism is three-body recombination into excited states (e+e+D+⇒D0+e), although radiative recombination (e+D+⇒D0+hν) contributes ∼5% to the total rate. Analysis of the Balmer series line intensities (from nupper=3 through 10) shows that the upper levels of these transitions are populated primarily by recombination. Thus the brightnesses of the Balmer series (and Lyman series) are directly related to the recombination rate. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872234
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  • 75
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    Digitale Medien
    Comments on "Dispersion relation of a plasma in the periodic magnetic field of a wiggler" [Phys. Plasmas 3, 1773 (1996)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2768-2768 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: It is argued that the equilibrium state of a wiggler background magnetoplasma corresponds to a zero momentum rather than to a plasma acquiring a non-zero velocity. (AIP)
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872398
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  • 76
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    Digitale Medien
    Comment on "Dynamic plasma screening effects on semiclassical inelastic electron–ion collisions in dense plasmas" [Phys. Plasmas 4, 21 (1997)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2770-2771 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Jung's analysis of dynamics screening appears to be flawed by attempting to patch many-body effects into a single-body theory and a more rigorous foundation is necessary. Jung's result and dynamical screening have been previously analyzed many times.(AIP)
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872400
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  • 77
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    Digitale Medien
    Comment on "Explanation for MARFE formation and subsequent evolution into a detached symmetric plasma edge" [Phys. Plasmas 3, 2673 (1996)], "MARFE impurity density limits in tokamaks with poloidal asymmetry and rotation" [Phys. Plasmas 3, 3032 (1996)], and "MARFE suppression by external edge heating" [Phys. Plasmas 4, 134 (1997)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2774-2775 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: W. M. Stacey presents stability criteria for the thermal instability based on a linear one-dimensional (1D) slab model including the effects of ionization recombination [Phys. Plasmas 3, 2673 (1996)], large radial gradients and rotation [Phys. Plasmas 3, 3032 (1996)] and external edge heating [Phys. Plasmas 4, 134 (1997)]. The second paper is incorrectly presented as a two-dimensional (2D) analysis. The hypothesis for the poloidal asymmetry of the multifaceted asymmetric radiation from the edge (MARFE) is based on a misinterpretation of the linear results and contradicted by our own linear analyses in a 1D cylindrical [Phys. Plasmas 1, 2623 (1994)] and a 2D tokamak model [Plasma Phys. Controlled Fusion 39, 423 (1997)]. The explanation for the evolution into a detached plasma and for MARFE suppression by external edge heating are interesting hypotheses, supported by experimental observations. However, a 1D linear analysis does not offer the basis to support these hypotheses theoretically.© 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872401
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  • 78
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    Digitale Medien
    Enhanced coupling of the fast wave to electrons through mode conversion to the ion hybrid wave (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2031-2043 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: An analysis of ion cyclotron resonance heating in a plasma containing two ion species is given. Particular emphasis is placed on the important case of comparable concentrations of the two species. The properties of ion-Bernstein waves in such a plasma are discussed. A summary of the cutoff–resonance (Budden) and cutoff–resonance–cutoff (triplet) configurations is given and an analytic expression obtained for the Budden transmission coefficient (relevant also to the triplet case), which is valid for any concentration ratio of the two-ion species. A formula for the damping coefficient of the ion hybrid wave is obtained and a ray tracing code is used to illustrate the absorption of this mode by electrons close to the two-ion hybrid resonance. The reduced, second-order fast wave equation is solved numerically, illustrating the transition from strong electron heating through mode conversion at the two-ion hybrid resonance to direct electron damping of the fast wave in a high beta plasma.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872369
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  • 79
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    Digitale Medien
    Diamagnetism in a plasma (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2072-2080 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: This is an extension of a study of electric currents and force balance orthogonal to a unidirectional magnetic field of induction (B) in a collisionless plasma [K. D. Cole, Phys. Plasmas 3, 2717 (1996)]. All quantities are assumed to vary only in one direction orthogonal to B. Two new concepts are introduced, which are not in conventional plasma physics. First a magnetic polarization effect corresponding to electric polarization is found. This defines a contribution to the magnetic moment per unit volume of −ρmc2E2/B3. Second the conduction current is defined in terms of the curl of the magnetic field intensity H, in accordance with Maxwell. In this scheme, when there is no electric field, (1/4π)(∂H/∂z)B+(∂p⊥/∂z)=0, instead of the conventional equation with B/μ0 in place of H. In both schemes, j×B−(bold del)p⊥=0. Though this makes no difference to the electric current intensity calculated in the two schemes, and no difference to the force balance equation, it makes a significant difference to the relationship between B and p⊥ in many plasma conditions of interest. When the electric field is nonzero, the situation is more complex. It is shown that the new diamagnetism of this paper and the dielectric current of the earlier one are consistent with special relativity. Some applications of the theory are discussed. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872373
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  • 80
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    Digitale Medien
    Explosion of soliton in a multicomponent plasma (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2095-2100 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A three-dimensional nonlinear Kadomtsev–Petviashvili (K–P) wave equation is derived to discuss the solitons in multicomponent plasma contaminated with negative ions. A new formalism of the simple wave solution method is developed for finding the soliton behaviors caused by the presence of negative ions in plasmas. It is seen that the nonlinear wave equation leads, in some cases, to an ordinary differential equation and a straight way for solving the soliton propagation in plasmas. The overall observations describe the natures of compressive and rarefactive solitons along with the shock-like wave caused by the interaction of negative ions. Also discussed are the possible controls of the scenarios of soliton behaviors. Moreover it is believed, from present investigations, that the observations of collapses or explosions in solitons could enhance the understanding of the soliton phenomena in laboratory and space plasmas. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872545
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  • 81
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    Digitale Medien
    Statistical theory of resistive drift-wave turbulence and transport (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2116-2133 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Resistive drift-wave turbulence in a slab geometry is studied by statistical closure methods and direct numerical simulations. The two-field Hasegawa–Wakatani (HW) fluid model, which evolves the electrostatic potential and plasma density self-consistently, is a paradigm for understanding the generic nonlinear behavior of multiple-field plasma turbulence. A gyrokinetic derivation of the HW model is sketched. The recently developed Realizable Markovian Closure (RMC) is applied to the HW model; spectral properties, nonlinear energy transfers, and turbulent transport calculations are discussed. The closure results are also compared to direct numerical simulation results; excellent agreement is found. The transport scaling with the adiabaticity parameter, which measures the strength of the parallel electron resistivity, is analytically derived and understood through weak- and strong-turbulence analyses. No evidence is found to support previous suggestions that coherent structures cause a large depression of saturated transport from its quasilinear value in the hydrodynamic regime of the HW model. Instead, the depression of transport is well explained by the spectral balance equation of the (second-order) statistical closure when account is taken of incoherent noise. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872377
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  • 82
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    Digitale Medien
    Nonlinear dynamics of a beam-driven magnetic plasma: Streaming or mass motion (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2146-2150 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Explicit results pertaining to nonlinear oscillations in a magnetoactive beam–plasma system that shows transient or streaming phenomena are analytically presented. The nonlinear differential equation is formulated and solved in terms of a modified elliptic integral of motion. The phase-space mappings, and their striking features both in strong streaming and nonstreaming situations, are shown. The new features concerning streaming plasma analysis are illustrated in the form of frequency modulation, especially at the onset of chaos. The diminishing trend of modulated frequency in the strong streaming regions is concluded. The findings may have important implications for magnetospheric and cosmic plasma settings where beam plasma interactions exist. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872625
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  • 83
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    Digitale Medien
    The influence of fast ions on the magnetohydrodynamic stability of negative shear profiles (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2181-2187 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The influence of energetic ions on the stability of ideal double kink modes in a tokamak plasma with negative magnetic shear is investigated. It is found that the fast ions play a similar role as for the ordinary m=n=1 internal kink. In particular, phenomena analogous to sawtooth stabilization and fishbone excitation are possible.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872381
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  • 84
    Digitale Medien
    Digitale Medien
    Frequency dependent effects in helicon plasmas (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2741-2747 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Variations in the plasma parameters of a large volume, helicon source as a function of applied rf power (0–2 kW), driving frequency (8–18 MHz), magnetic field (0–1.4 kG) and fill pressure (2–10 mTorr) have been studied. The transitions between the capacitive, inductive, and resonant helicon mode are consistent with previous experiments. Our data indicate that the transition to the helicon mode occurs at a unique magnetic field, independent of the driving frequency. Based on the helicon wave dispersion relation, from which helicon wavelengths can be calculated, the observed variations in plasma density as a function of driving frequency suggest that the wavelength of the helicon wave is a weak function of driving frequency. Calculation of the electron energies which correspond to the phase velocity of the driving wave (i.e., Landau damping) suggest that either Landau damping cannot be responsible for the efficient ionization of helicon sources, or that the helicon portion of the discharge does not extend over the entire radius of the apparatus. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872142
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  • 85
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    Digitale Medien
    Modeling ionization by helicon waves (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2748-2755 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The response of the electron distribution function in one dimension to a traveling wave electric field is modeled for parameters relevant to a low-pressure helicon wave plasma source, and the resulting change in the ionization rate calculated. This is done by calculating the trajectories of individual electrons in a given wave field and assuming no collisions to build up the distribution function as the distance from the antenna is increased. The ionization rate is calculated for argon by considering the ionization cross section and electron flux at a specified position and time relative to the left-hand boundary, where the distribution function is assumed to be Maxwellian and the wave travels to the right. The simulation shows pulses in the ionization rate that move away from the antenna at the phase velocity of the wave, demonstrating the effect of resonant electrons trapped in the wave's frame of reference. It is found that the ionization rate is highest when the phase velocity of the wave is between 2 and 3×106 m/s, where the electrons interacting strongly with the wave (i.e., electrons with velocities inside the wave's "trapping width") have initial energies just below the ionization threshold. Results from the model are compared with experimental data and show reasonable qualitative agreement. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872143
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  • 86
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    Digitale Medien
    Dynamic plasma screening effects on electron capture process in hydrogenic ion–fully stripped ion collisions in dense plasmas (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2756-2759 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In dense plasmas, dynamic plasma screening effects are investigated on electron capture from hydrogenic ions by past fully stripped ions. The classical Bohr–Lindhard model has been applied to obtain the electron capture probability. The interaction potential in dense plasmas is represented in terms of the longitudinal dielectric function. The classical straight-line trajectory approximation is applied to the motion of the projectile ion in order to visualize the electron capture probability as a function of the impact parameter, projectile energy, and plasma parameters. The electron capture probability including the dynamic plasma screening effect is always greater than that including the static plasma screening effect. When the projectile velocity is smaller than the electron thermal velocity, the dynamic polarization screening effect becomes the static plasma screening effect. When the projectile velocity is greater than the plasma electron thermal velocity, the interaction potential is almost unshielded. The difference between the dynamic and static plasma screening effects is more significant for low energy projectiles. It is found that the static screening formula obtained by the Debye–Hückel model overestimates the plasma screening effects on the electron capture processes in dense plasmas. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872144
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  • 87
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    Digitale Medien
    Neoclassical transport in an annular penning trap (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2760-2762 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A modified Penning trap is described with an annular confinement region and a toroidal magnetic field. A non-neutral electron plasma is confined axially by an electrostatic field and, in the radial direction, particles are constrained to lie within a small drift distance of a cylindrical flux surface. Drift orbits of all particles are banana-shaped and collisions cause neoclassical transport. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872145
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  • 88
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    Digitale Medien
    Response to "Comments on ‘Dispersion relation of a plasma in the periodic magnetic field of a wiggler' " [Phys. Plasmas 3, 1773 (1996)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2769-2769 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: It is argued that a wiggler plasma may acquire a non-zero velocity in the equilibrium and that it should be somehow consistent with the conservation of energy. (AIP)
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872399
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  • 89
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    Digitale Medien
    Response to "Comment on ‘Dynamic plasma screening effects on semiclassical inelastic electron–ion collisions in dense plasmas' " [Phys. Plasmas 4, 21 (1997)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2772-2773 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We used a semiclassical technique to calculate the interaction energy between the electron (velocity v) and the target electron by including the dynamic screening effect and effects on atomic transition processes. This differs from previous work. (AIP)
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872407
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  • 90
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    Digitale Medien
    Erratum: "Current driven nonlinear Langmuir structures in plasmas" [Phys. Plasmas 4, 230 (1997)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2778-2778 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872622
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  • 91
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    Digitale Medien
    Alfvén wave forces, affecting the tokamak edge plasma in the presence of impurities or dust (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3436-3438 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Dust particles appear on the edge of tokamak plasmas as a result of disruptions and plasma interactions with divertor plates, limiters, or blankets, as well as of pellet injections. It is shown that the presence of the dust impurities can lead to an effective decrease of the slow Alfvén wave absorption in the region. These waves are used for heating, current drive, and control of the low-to-high (L–H) confinement transition. Radio-frequency forces can also be strongly changed in the presence of dust particles. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872488
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  • 92
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    Digitale Medien
    Comment on "Two-dimensional solitary kinetic Alfvén waves and dipole vortex structures" [Phys. Plasmas 4, 611 (1997)] (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3445-3446 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872490
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  • 93
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    Digitale Medien
    An electrostatic magnetohydrodynamics theory for resistive-viscous helical instabilities of arc discharges (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2791-2797 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A simplified linear analysis for resistive-viscous magnetic helical instabilities of arc discharges in a cylindrical plasma is developed. Based on a set of electrostatic magnetohydrodynamic (MHD) equations, resistive-viscous m=1 modes with an external axial magnetic field are studied. Explicit analytic results are obtained, from which the growth rate and the stability criterion can be shown, and the electrostatic assumption can be justified. In comparison with the previous channel model calculations, this analytic treatment can provide a simplified model for instability estimates, while avoiding artificial assumptions and misorderings in the energy equation. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872411
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  • 94
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    Digitale Medien
    Electric field spikes formed by electron beam–plasma interaction in plasma density gradients (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2805-2812 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In the electron beam–plasma interaction at an electric double layer the beam density is much higher than in the classical beam–plasma experiments. The wave propagation takes place along the density gradient that is present at the high potential side of the double layer. Such a case is studied experimentally by injecting the electron beam from a plane cathode, without any grids suppressing the gradient, and by particle simulations. The high frequency field concentrates in a sharp "spike" with a half width of the order of one wavelength. The spike is found to be a standing wave surrounded by regions dominated by propagating waves. It forms at a position where its frequency is close to the local plasma frequency. The spike forms also when the electric field is well below the threshold for modulational instability, and long before a density cavity is formed in the simulations. Particle simulations reveal that, at the spike, there is a backward traveling wave that, when it is strongly damped, accelerates electrons back towards the cathode. In a simulation of a homogeneous plasma without the density gradient no spike is seen, and the wave is purely travelling instead of standing. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872413
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  • 95
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    Digitale Medien
    Frequency dependence of the plasma density for helicon plasmas (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 1463-1467 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Variations of plasma density are investigated as a function of frequency of rf power in a helicon plasma source. Abrupt, almost step-like changes in the plasma density are observed during the frequency scans under various conditions of the input rf power, the argon gas pressure, and the magnetic field. It is found that the transition frequencies shift to the lower value region as the input rf power and/or the argon gas pressure is increased, and to the higher value region as the magnetic field is increased. The observed density transitions are compared with semianalytical calculations based on the power balance relation and it has been shown that the results are in good agreement. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872325
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  • 96
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    Digitale Medien
    Dynamics of plasma containing a population of negatively charged heavy vortex elements (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 1484-1485 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Due to the presence of a population of heavy, negatively charged vortex elements, plasma becomes birefringent to a low frequency circularly polarized wave of infinitesimally small amplitude. The right circular polarization part remains dispersive whereas the left circular polarization part decays if the rotation associated with the vorticity is anticlockwise as seen by an observer looking antiparallel to the direction of the axis of rotation. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872321
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  • 97
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    Digitale Medien
    Antimatter plasmas and antihydrogen : The 38th annual meeting of the Division of Plasma Physics (DPP) of the American Physical Society (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 1528-1543 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Recent successes in confining antimatter in the form of positron and antiproton plasmas have created new scientific and technological opportunities. Plasma techniques have been the cornerstone of experimental work in this area, and this is likely to be true for the foreseeable future. Work by a number of groups on trapping antimatter plasmas is summarized, and an overview of the promises and challenges in this field is presented. Topics relating to positron plasmas include the use of positrons to study the unique properties of electron–positron plasmas, the interaction between positrons and ordinary matter, and the laboratory modeling of positron-annihilation processes in interstellar media. The availability of cold, trapped antiprotons and positrons makes possible the production of neutral antimatter in the form of antihydrogen. This is expected to enable precise comparisons of the properties of matter and antimatter, including tests of fundamental symmetries and the measurement of the interaction of antimatter with gravity. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872284
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  • 98
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    Digitale Medien
    Origin of diffusion in Hamiltonian dynamics : The 38th annual meeting of the Division of Plasma Physics (DPP) of the American Physical Society (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 1576-1581 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Without invoking any kind of "loss of memory" hypothesis, a diffusion equation is derived for the Hamiltonian dynamics defined by H=p2/2+(K/4π2)∑m=−MM cos(q−mt+cursive-phim), where the cursive-phims are fixed random phases. The key point of the derivation is a property of locality for the waves inducing transport. Using perturbation theory, it is shown that only waves whose phase velocities satisfy |m−p(t)|≤α(K/4π2)2/3, where α is a constant, approximately 5, play a relevant role for the statistical properties of the dynamics. This implies scaling properties for the dynamics, and leads to the understanding of the origin of force decorrelation and of diffusion, and to the prediction of their occurrence in time. Moreover, the convergence of the diffusion coefficient to its quasilinear value when K→∞ is shown, and is interpreted as the consequence of the crossover between two regimes of decorrelation that are of different natures. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872288
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  • 99
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    Digitale Medien
    Test particle transport from long-range collisions : The 38th annual meeting of the Division of Plasma Physics (DPP) of the American Physical Society (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 1552-1558 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Enhanced cross-magnetic-field diffusion of test particles in pure ion plasmas has been measured. The ion plasma is contained in a Penning-Malmberg trap for weeks near thermodynamic equilibrium, characterized by rigid rotation and uniform density and temperature. Plasma expansion and loss is suppressed by a "rotating wall" technique, i.e., a weak electrostatic potential rotating faster than the plasma. Test particle transport is then measured even though there is zero net transport, in a regime where neutral collisions are negligible. The observed test particle transport is diffusive, i.e., proportional to the gradient of the test particle concentration. The measured diffusion coefficients scale as nT−1/2B−2 over a range of 40 in density, 50 in temperature, and 5 in magnetic field. This diffusion is about ten times greater than predicted by classical collisional theory, which describes velocity-scattering collisions with impact parameters ρ(approximately-less-than)rc. The enhanced transport is thought to be due to non-velocity-scattering "E×B drift" collisions with rc〈ρ(approximately-less-than)λD. Initial estimates of diffusion due to these long-range collisions are three times less than the measurements, and substantial theory questions remain. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872359
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  • 100
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    Digitale Medien
    The stability of advanced operational regimes on the Tokamak Fusion Test Reactor : The 38th annual meeting of the Division of Plasma Physics (DPP) of the American Physical Society (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 1589-1595 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The performance of the Tokamak Fusion Test Reactor [D. Meade and the TFTR Group, in Plasma Physics and Controlled Nuclear Fusion Research, Washington, D.C., 1990 (International Atomic Energy Agency, Vienna, 1991), Vol. I, pp. 9–24], as defined by the maximum fusion power production, has been limited, not by confinement, but by stability to pressure-driven modes. Two classes of current profile modification have been investigated to overcome this limit. A new technique has been developed to increase the internal inductance of low-q (q(approximate)4), high-current (Ip〉2MA) plasmas. As was the case at higher edge q, the disruptive β limit has been found to increase roughly linearly with the internal inductance, li. Plasmas with hollow current profiles, i.e., reversed shear, are also predicted and experimentally observed to have increased stability in the negative shear region to ballooning and kink modes. However, performance of these plasmas is still limited by pressure-driven modes in the normal shear region. © 1997 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.872290
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