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Author(s):
A. Shimizu, A. Fujisawa, S. Ohshima and H. Nakano
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Title:
Consideration of Magnetic Field Fluctuation Measurements in a Torus Plasma with Heavy Ion Beam Probe
Date of publication:
Mar. 2004
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Key words:
Heavy Ion Beam Probe (HIBP), magnetic field fluctuation, path integral effect, torus plasma
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Abstract:
The article discusses feasibility of magnetic fluctuation measurement with a heavy ion beam probe (HIBP) in an axisymmetric torus configuration. In the measurements, path integral fluctuation along the probing beam orbit should be considered as is similar to the density fluctuation measurements with HIBP.A calculation, based on an analytic formula, is performed to estimate the path integral effects for fluctuation patterns that have difference in profile, the correlation length, the radial wavelength, and the poloidal mode number. In addition, the large distance between the plasma and the detector is considered to lessen the path integral effect. As a result, it is found that local fluctuation of magnetic field can be properly detected with a heavy ion beam probe.
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