TEMPERATURE ANISOTROPY MEASUREMENT USING DIAMAGNETIC LOOP ARRAY

The anisotropy of the ion distribution function in the velocity space is observed in the ion cyclotron range of frequency heating experiments on the tandem mirror GAMMA 10. The anisotropy, defined as T(perpendicular-to)/T(parallel-to) (ratio of ion temperatures perpendicular and parallel to the magn...

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Bibliographic Details
Published in:JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 1992-07, Vol.31 (7), p.2249-2254
Main Authors: KATSUMATA, R, INUTAKE, M, ICHIMURA, M, HINO, N, ONDA, H, KATANUMA, HOJO, H, MASE, A, MIYOSHI, S
Format: Article
Language:English
Subjects:
Exact sciences and technology
Physical Sciences
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Physics, Applied
Plasma diagnostic techniques and instrumentation
Science & Technology
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Summary:The anisotropy of the ion distribution function in the velocity space is observed in the ion cyclotron range of frequency heating experiments on the tandem mirror GAMMA 10. The anisotropy, defined as T(perpendicular-to)/T(parallel-to) (ratio of ion temperatures perpendicular and parallel to the magnetic field line), is evaluated quantitatively using three diamagnetic loops aligned in the direction of the magnetic field line. Depending on the anisotropy and the plasma pressure, fluctuations below the ion cyclotron frequency are excited. In terms of the quantitative estimation of the anisotropy, it is established clear that the parameter region in which the fluctuations are observed agrees well with a theoretically predicted region of the convectively unstable Alfven ion cyclotron mode.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.31.2249