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

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

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number043504
JournalReview of Scientific Instruments
Volume76
Issue number4
DOIs
Publication statusPublished - Apr 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation

Fingerprint Dive into the research topics of 'Consideration of magnetic field fluctuation measurements in torus plasma with a heavy ion beam probe'. Together they form a unique fingerprint.

Cite this