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  • 1985-1989  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Ion temperature profile measurements using the far line wings of Hα (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 2026-2028 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We present ion temperature profiles for the outer half of the TEXT plasma using the Doppler broadened far line wings of the Hα line profile. The technique depends on the assumption that the hydrogen neutrals have equilibrated with the ions through charge-exchange collisions. Data reduction depends upon going far enough out on the line wing that the remaining intensity in the profile originates in the hottest portion of the line of sight, thus removing the need for an inversion procedure. A scanning Fabry–Perot interferometer is used to measure the line profiles because of its superior instrumental profile. This technique and its results will be compared with the charge-exchange technique and impurity Doppler broadening results. The application to ion temperature measurements using a diagnostic neutral beam will also be discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138779
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Digital complex demodulation applied to interferometry (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 1989-1991 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The objective of this paper is to describe the principles of digital complex demodulation, and to summarize its advantages with respect to rapid time response and insensitivity to noise. These advantages are demonstrated by application to interferometry data collected on the Texas experimental tokamak (TEXT).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138762
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Measurements of neutral density profiles on the TEXT tokamak (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 1494-1496 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Neutral density profiles are measured in the outer third of the plasma of the TEXT tokamak in conjunction with ion temperature measurements using the far line wings of a Hα profile. The advantage of this technique is that it does not require a radial inversion of the data to obtain a measure of the local neutral density. The ion temperature profiles are compared with the results from a neutral particle analyzer, and the neutral profiles with the results of a numerical code which solves a system of coupled linear equations describing particle transport from a neutral source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140174
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Temperature fluctuations and transport in a tokamak edge plasma (1989)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 1 (1989), S. 2027-2030 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using the technique first described by Robinson and Rusbridge [Plasma Phys. 11, 73 (1969)] electron temperature fluctuations have been measured in the scrape-off layer of the TEXT tokamak [Nucl. Technol. Fusion 1, 479 (1981)] to be T˜e/Te (approximately-equal-to)0.4ñe/ne. Particle and energy transport were estimated from 〈ñe E˜θ〉 and 〈T˜e E˜θ〉 correlations. The fluctuation-driven particle transport was consistent with earlier measurements and with measurements of global particle confinement. A high correlation of temperature and electric field fluctuations and a low but positive correlation between density and temperature fluctuations were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859066
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    Paper (German National Licenses)
    Fulltext
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