Plasma and Fusion Research

Volume 11, 1201091 (2016)

Rapid Communications

Improvement of the Reynolds Stress Probe for End-Plate Biasing Experiments in a Cylindrical Laboratory Plasma
Tomotsugu KANZAKI, Yoshihiko NAGASHIMA1), Shigeru INAGAKI1), Fumiyoshi KIN, Yudai MIWA, Makoto SASAKI1), Takuma YAMADA2), Akihide FUJISAWA1), Tatsuya KOBAYASHI3), Naohiro KASUYA1), Yusuke KOSUGA4), Sanae-I. ITOH1) and Kimitaka ITOH3)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
1)
Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
2)
Faculty of Arts and Science, Kyushu University, Kasuga, Fukuoka 819-0395, Japan
3)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
4)
Institute for Advanced Study, Kyushu University, Kasuga, Fukuoka 812-8581, Japan
(Received 18 March 2016 / Accepted 15 April 2016 / Published 10 June 2016)

Abstract

We improved the signal-to-noise ratio of a Reynolds stress (RS) probe in order to measure the Reynolds stress more accurately. By introducing a shield pipe in the probe, the power spectral density of the noise was suppressed to approximately one tenth in an electric biasing experiment. It was also confirmed that the leak current in the RS probe, which had been used in previous experiments, was small enough for the study of drift waves in our linear device.

Keywords

linear device, probe, electric bias experiment, Reynolds stress

DOI: 10.1585/pfr.11.1201091

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