Consideration of magnetic field fluctuation measurements in torus plasma with a heavy ion beam probe

A. Shimizu, A. Fujisawa, S. Ohshima, H. Nakano

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)

抄録

The article proposes a method of magnetic fluctuation measurement using a heavy ion beam probe (HIBP) in an axisymmetric torus configuration. The method is based on the detection of the toroidal position (not velocity) of the secondary beam in the analyzer. However, the method needs careful consideration with respect to path integral fluctuations along the probing beam orbit to evaluate local magnetic fluctuation, similarly to density fluctuation measurements with a HIBP. Here, we present an analytic formula to estimate and calculate the path integral effects for different fluctuation patterns in the profile, the correlation length, the radial wavelength, and the poloidal mode number. As a result, it is found that a large distance between the plasma and the detector lessens the importance of the path integral effect, and that local fluctuation of the magnetic field can be properly detected with a HIBP.

本文言語英語
論文番号043504
ジャーナルReview of Scientific Instruments
76
4
DOI
出版ステータス出版済み - 4 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • Instrumentation

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