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  • 2000-2004
  • 1995-1999  (7)
  • 1996  (4)
  • 1995  (3)
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  • 2000-2004
  • 1995-1999  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    Electron cyclotron resonance heating near the turning point in inhomogeneous magnetic field (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 3318-3323 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cyclotron resonance heating of electrons in a magnetic beach is studied by rigorous numerical analysis of the electron trajectories. It is confirmed that a heating response function [Y. Kiwamoto et al., Phys. Plasmas 1 834 (1994)] connecting the velocity distributions in both sides of the resonance layer can be applied over a wider range of electron velocities than originally expected. For electrons mirror-reflected close to the resonance layer, however, the electron velocity distribution after heating substantially deviates from the prediction of the response function. The deviation is quantitatively evaluated to obtain a criterion of applicability of the response function. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871600
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Contribution of Yushmanov-trapped electrons to a thermal dike (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 1603-1611 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A substantial amount of Yushmanov-trapped electrons are generated as a result of electron cyclotron resonance heating employed for generating a thermal dike in an open magnetic field configuration. The production rate and the energy spectrum of the trapped electrons are calculated by using a heating response function. The calculated energy spectrum of the end-loss electrons driven from the Yushmanov-trapped region indicates a reduction in power efficiency of the thermal dike. The potential profile modified by the Yushmanov-trapped particles tends to reduce their production rate, leading to a stationary state. Their significance to a thermal dike basic experiment in the end region of the GAMMA 10 tandem mirror [Plasma Physics and Controlled Nuclear Fusion Research 1992 (International Atomic Energy Agency, Vienna, 1993), Vol. 2, p. 651] is discussed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872019
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Suppression of secondary electrons from an endplate of a tandem mirror by use of a biased mesh (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 352-354 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Negative bias is applied to a mesh placed in front of an endplate of the GAMMA 10 tandem mirror [Phys. Rev. Lett. 55, 939 (1985)]. A bias voltage of around 10 V results in an increase of the potential difference by an order of kV in the end region. The increment is about two times the temperature of end-loss electrons and most of that stems from the sheath potential drop in front of the endplate. Provided that almost all the secondary electrons emitted from endplate are reflected, these results agree with the prediction of a potential model for the open magnetic field configuration [J. Phys Soc. Jpn. 61, 3153 (1992)]. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871439
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Current–voltage characteristics of the end loss ion flux from a tandem mirror collected on a gridded energy analyzer (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 2207-2214 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Examination is made of the relation between the distribution function of the ions confined in a tandem mirror and the current–voltage (I–V) characteristics of the end loss ions collected on a gridded energy analyzer. To do this, a model ion distribution function characterized by two parameters, an anisotropy parameter χ and a decay parameter Y is used. The decay parameter represents depletion of ion distribution in the loss cone. A Maxwellian distribution as the limit of Y=∞ is shown not to reproduce the measured I–V curve as an energy spectrum of the ions lost from the central cell of the GAMMA 10 tandem mirror [Phys. Rev. Lett. 55, 939 (1985)]. The ions in the central cell are subject to strong ICRH and have a highly anisotropic velocity distribution. These ions are deeply trapped in the central cell and the loss cone is not fully occupied. The model distribution with a small value of Y represents such features of the ion distribution. From comparison between a measured loss current and calculated one, the decay parameter of the model distribution function is roughly determined. The model distribution with this parameter yields I–V characteristics similar to the measured one. The present article gives the relation between the apparent ion temperature Ti simply determined from the slope of the log plot of the measured I–V curve and the real parallel ion temperature Ti(parallel). When the ion distribution is of a loss cone type, Ti is almost equal to Ti(parallel). On the other hand, Ti can be more than two times as high as Ti(parallel) if the ion distribution is Maxwellian-like. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147038
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  • 5
    Electronic Resource
    Electronic Resource
    Performance of a materials science facility at the Photon Factory: Soft x-ray beamline BL 13C coupled with multipurpose analytical apparatus : Proceedings of the 5th international conference on synchrotron radiation instrumentation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 1780-1782 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The performance data of an undulator soft x-ray beamline based on the cylindrical element monochromator concept are described. Photon fluxes over 1012 photon/s 0.1% b.w. are achieved with the slit width of 100 μm at the harmonic peaks of a 13-period undulator. The maximum resolution obtained at the N K edge (E/ΔE) is ≈5000 with the slit width of 10 μm. The beamline is equipped with a multipurpose analytical instrument having a hemispherical electron analyzer and other detectors. The system is used for both x-ray photoelectron spectroscopy and x-ray absorption fine structure analyses for surface and materials science. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145848
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Raman and differential thermal analysis studies of aqueous CsF solution in the glassy state (1995)
    Springer
    Journal of solution chemistry 24 (1995), S. 633-639 
    Details
    ISSN: 1572-8927
    Keywords: Glass transition temperature ; aqueous CsF solution ; Raman spectra ; glassy state
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The glass transition temperature T g of an aqueous CsF solution was measured as a function of CsF concentration, and Raman spectra of the solution were obtained for both liquid and glassy states. The results were discussed in comparison with those for aqueous LiX (X=Cl, Br and I) and HF solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00973231
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  • 7
    Electronic Resource
    Electronic Resource
    Cell cycle-dependent expression of the mouseRad51 gene in proliferating cells (1996)
    Springer
    Molecular genetics and genomics 251 (1996), S. 1-12 
    Details
    ISSN: 1617-4623
    Keywords: DNA repair ; DNA replication ; Homologous recombination ; Meiosis ; RecA gene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The mouseRad51 gene is a mammalian homologue of theEscherichia coli recA and yeastRAD51 genes, both of which are involved in homologous recombination and DNA repair in mitosis and meiosis. The expression of mouseRad51 mRNA was examined in synchronized mouse m5S cells. TheRad51 transcript was observed from late G1 phase through to M phase. During the period of late G1-S-G2, the RAD51 proteins were observed exclusively in nuclei. Activation by mitogens of T cell and B cell proliferation in spleen induced the expression ofRad51 mRNA. By immunohistochemical analyses, the mouse RAD51 protein was detected in proliferating cells: spermatogonia in testis, immature T cells in thymus, germinal center cells of the secondary lymphatic nodules of spleen and intestine, follicle cells in ovary and epithelial cells in uterus and intestine. It was also expressed in spermatocytes during early and mid-prophase of meiosis and in resting oocytes before maturation. Thus, mouseRad51 expression is closely related to the state of cell proliferation and is presumably involved in DNA repair coupled with DNA replication, as well as in meiotic DNA recombination in spermatocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02174338
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    Paper (German National Licenses)
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