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

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Article number1402002
JournalPlasma and Fusion Research
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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