A Calibration of Setting of Mach Probes by Observing GAM Oscillations

Kimitaka ITOH; Kaijun ZHAO; Jiaqi DONG; Sanae-I. ITOH; Akihide FUJISAWA; Shigeru INAGAKI; Makoto SASAKI; Yoshihiko NAGASHIMA; Yusuke KOSUGA; Jun CHENG; Tatsuya KOBAYASHI

doi:10.1585/pfr.11.1402002

Regular Articles

A Calibration of Setting of Mach Probes by Observing GAM Oscillations

Kimitaka ITOH, Kaijun ZHAO, Jiaqi DONG, Sanae-I. ITOH, Akihide FUJISAWA, Shigeru INAGAKI, Makoto SASAKI, Yoshihiko NAGASHIMA, Yusuke KOSUGA, Jun CHENG, Tatsuya KOBAYASHI

著者情報

キーワード: geodesic acoustic mode, probe measurement, Mach probe, probe alignment

ジャーナルフリー

2016 年 11 巻 p. 1402002

DOI https://doi.org/10.1585/pfr.11.1402002

詳細

抄録

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.

責任著者(Corresponding author)

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