Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Regular Articles
A Calibration of Setting of Mach Probes by Observing GAM Oscillations
Kimitaka ITOHKaijun ZHAOJiaqi DONGSanae-I. ITOHAkihide FUJISAWAShigeru INAGAKIMakoto SASAKIYoshihiko NAGASHIMAYusuke KOSUGAJun CHENGTatsuya KOBAYASHI
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2016 Volume 11 Pages 1402002

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Abstract

The influence of relative displacement of Mach probe (which is placed near the top of magnetic surface) on the interference of signals is discussed. An error can arise in measured value of poloidal electric field. The Mach number perturbation at the GAM frequency has an interference from the density perturbation. The interference from the density perturbation can propagate to all of Mach number measurement. By observing the signals associated with GAM oscillations, the error in setting the probe arrays can be detected. This result can be applied to correct the positioning of probes.

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© 2016 by The Japan Society of Plasma Science and Nuclear Fusion Research
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