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  • 1
    Digitale Medien
    Digitale Medien
    Characteristics of a novel ion energy spectrum f(E(parallel),E⊥) analyzer in measurements of plasma flow in a magnetic mirror throat : Proceedings of the 12th topical conference on high temperature plasma diagnostics (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 853-856 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: The new ion energy analyzer is developed to measure the energy distribution function f(E(parallel),E⊥) of ions lost along the confinement magnetic field [M. Okubo et al., J. Plasma Fusion Res. 70, 1102 (1994)]. The end-loss ions have larger E⊥ components compared with their E(parallel) components in the magnetic mirror throat. In this case, the ion energy distribution function is distorted because of the incident angle dependency of the retarding grid transmission. We try to compensate a measured energy distribution function by calculated grid transmission functions. © 1999 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1149446
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  • 2
    Digitale Medien
    Digitale Medien
    Numerical simulation of magnetic compression on a field-reversed configuration plasma (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 4672-4678 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A two-dimensional magnetohydrodynamic (MHD) simulation of an axial magnetic compression on a field-reversed configuration (FRC) plasma is carried out for the parameter range of a corresponding experiment conducted on the FRC Injection Experiment (FIX) [S. Okada et al., 17th IAEA Fusion Energy Conference 1998 (International Atomic Energy Agency, Vienna) (in press)]. The simulation results show that during the initial stage of the magnetic compression the front part of the FRC plasma is mainly compressed radially, and that after this stage, the compression is primarily axial. Of particular interest is expected that the closed magnetic flux surfaces of the FRC can be retained without any degradation during the magnetic compression process. Further, it is observed in the simulation that the axial magnetic compression enables a transition of the MHD equilibrium from a long and thin to a short and fat FRC. The effects of this magnetic compression on FRC plasmas are discussed. © 1999 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.873753
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  • 3
    Digitale Medien
    Digitale Medien
    Particle end loss in the edge plasma of a field-reversed configuration (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 3649-3655 
    Details
    ISSN: 1089-7674
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Plasma parameters, particle end loss flux, flow velocity, and pressure are measured using a radial array of magnetic probes and directional electrostatic probes, in order to investigate particle loss processes in the edge layer of a field-reversed configuration (FRC). A plasma flow toward the end region is detected outside the separatrix between the axial midplane and the end region. The exhaust flow is also found in the end region. These results imply that particles are lost radially across the separatrix and then axially to the end. Measured flow velocity in the end region agrees within an error of 20% with the fluid-theory prediction, in which isentropy and axial momentum balance along magnetic flux tubes are assumed. The existence of the sonic condition in the end region is also suggested, analogous to ordinary fluid flow in a nozzle. The magnetic flux embedded in the edge layer of the confinement region and in the end region agrees within an error of 30%. These results indicate the applicability of the magnetohydrodynamics (MHD) theory for particle end loss. The end loss time along the open field agrees with the MHD prediction within an error of 20%. The measured particle loss flux from the end region is explained by the MHD theory within an error of 20%. The plasma outside the separatrix is considered to behave as hydrodynamic flow through the magnetic loss channel, contrary to the previous work [L. C. Steinhaur, Phys. Fluids 29, 3379 (1986)]. It seems that the magnetic mirror field improves the particle confinement in the edge plasma of the FRC and thus assist the FRC confinement as previously predicted [Slough et al., Nucl. Fusion 24, 1537 (1984)]. © 1998 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.873083
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  • 4
    Digitale Medien
    Digitale Medien
    Pulse modulated electron cyclotron resonance plasma for chemical vapor deposition of diamond films (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 1602-1604 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Pulse operation of electron cyclotron resonance plasma was performed for the fabrication of diamond films by chemical vapor deposition. With square wave amplitude modulation of microwaves at 500 Hz in frequency, the growth rate became twice as large as one of continuous operation with the same microwave power. Time resolved measurement of the optical emission from the pulse modulated plasma was also carried out. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.113865
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  • 5
    Digitale Medien
    Digitale Medien
    Proton MR Spectroscopy in Solvent Abusers (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 801 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb17466.x
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  • 6
    Digitale Medien
    Digitale Medien
    Renal cysts and associated renal tumours in male ddY mice injected with ferric nitrilotriacetate (1995)
    Springer
    Virchows Archiv 427 (1995), S. 91-99 
    Details
    ISSN: 1432-2307
    Schlagwort(e): Ferric nitrilotriacetate ; Renal proximal tubules ; γ-glutamyltranspeptidase ; Renal cysts ; Renal tumours
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract In experiments using ferric nitrilotriacetate (Fe-NTA) as a renal carcinogen, multiple renal cysts are often observed in addition to renal tumours. In the present study, we used 3-week-old male ddY mice and examined the relation between renal cysts and cancer development. Four months after the start of Fe-NTA administration, we observed cysts in the renal cortex in all Fe-NTA-treated mice, but not in Fe-free NTA-treated mice. Three types of cysts were observed, but only those which originated from the renal proximal tubules showed multi-layered or papillary growth of cyst epithelial cells. Using histochemical staining, we found a cyst formation-tumour induction sequence, and the supposed cystic-papillary tumour induced by Fe-NTA was of proximal tubular cell origin. We also found that the minimum dose of Fe-NTA capable of inducing renal tumours in ddY mice was 10 mg of iron/kg/day, four times in 2 weeks.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00203743
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  • 7
    Digitale Medien
    Digitale Medien
    1,8-Bis(2-thienyl)-1,3,5,7-octatetrayne (1998)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 54 (1998), S. 1519-1521 
    Details
    ISSN: 1600-5759
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0108270198005605
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  • 8
    Digitale Medien
    Digitale Medien
    The range of the integration map of a vector measure (1995)
    Springer
    Archiv der Mathematik 64 (1995), S. 512-522 
    Details
    ISSN: 1420-8938
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01195133
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  • 9
    Digitale Medien
    Digitale Medien
    In-vacuum undulators of SPring-8 (1998)
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 5 (1998), S. 403-405 
    Details
    ISSN: 1600-5775
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Most of the SPring-8 insertion devices are in-vacuum undulators except for the soft X-ray devices and one elliptical wiggler. The standard-type SPring-8 in-vacuum undulator has a period of 32 mm and a minimum gap of 8 mm. The fundamental radiation energy ranges from 5.2 to 18.5 keV. Three standard in-vacuum undulators are already installed in the ring and are operating without any problems. The magnetic field correction, the vacuum system and the commissioning of the in-vacuum undulators are described in this paper.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0909049597015720
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  • 10
    Digitale Medien
    Digitale Medien
    Interaction between valproate formulation and phenytoin concentrations (1995)
    Springer
    European journal of clinical pharmacology 48 (1995), S. 61-63 
    Details
    ISSN: 1432-1041
    Schlagwort(e): Valproate ; Phenytoin ; drug interaction ; slow-release tablet
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Medizin
    Notizen: Abstract Changes in phenytoin concentrations caused by switching valproate formulations with different absorption rates were retrospectively investigated in eleven epileptic patients receiving treatment with both drugs. Total plasma phenytoin concentrations were measured before and after a standard tablet of valproate was replaced by the same dose as a slow-release tablet. The mean plasma phenytoin level rose significantly from 14.4 to 18.7 μg·ml−1. Nine of eleven patients had markedly increased phenytoin levels (by 21 to 72%), and two developed toxic symptoms. The results indicate that changing valproate formulations can cause major alterations in the plasma concentration of co-administered phenytoin.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00202174
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