Mizuguchi M, Yoshikawa M, Miyata Y, Goshu S, Nakada M, Oono Y, Nakashima Y, Imai T. Study of radial potential fluctuations by using a gold neutral beam probe system.
THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008;
79:10F309. [PMID:
19044622 DOI:
10.1063/1.2964227]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A study of fluctuation is one of the main issues in fusion plasma researches. The potential and its fluctuation are measured by a gold neutral beam probe (GNBP) in the tandem mirror GAMMA10. Since there is no stable isotope ((197)Au approximately 100%), there are little measurement errors. GNBP system can measure the potential with about +/-30 V of error. The time and spatial resolutions are estimated to be about 3 micros and 5 mm, respectively. During the formation of axial confining potentials, the radial profiles of the potential and its fluctuation were successfully measured in GAMMA10. GNBP is a useful tool for the study of radial potential fluctuation directly in plasmas.
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