Plasma and Fusion Research

Volume 17, 1402100 (2022)

Regular Articles

Effects from the Target Plate Geometry on Fluctuations of Helium Plasma in the Linear Divertor Simulator Magnum-PSI
Masayuki YOSHIKAWA, Hirohiko TANAKA1), Yuki HAYASHI2), Shin KAJITA3), Hennie van der MEIDEN4), Jordy VERNIMMEN4), Thomas MORGAN4), Junko KOHAGURA, Yoriko SHIMA, Satoshi TOGO, Naomichi EZUMI, Yousuke NAKASHIMA and Mizuki SAKAMOTO
Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
1)
Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
2)
National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
3)
Graduate School of Frontier Sciences, University of Tokyo, Kashiwa 277-8561, Japan
4)
DIFFER-Dutch Institute for Fundamental Energy Research, 5612 AJ Eindhoven, The Netherlands
(Received 1 May 2022 / Accepted 21 August 2022 / Published 7 October 2022)

Abstract

With the help of the linear divertor simulation device Magnum-PSI, a fluctuation investigation of the impact of the target plate geometry was conducted. We simultaneously quantify coherent low-frequency fluctuations with a newly built 70-GHz microwave reflectometry system, a reciprocating probe, a light emission detector system, and a fast-framing camera system. The strong low-frequency fluctuations were observed at both the electron density and the plasma radiations by moving the target plate along the magnetic field line. Furthermore, a strong peak in fluctuation intensity and the influence of the target plate tilt angle on the fluctuation intensity were noted.

Keywords

fluctuation, divertor simulator, Magnum-PSI

DOI: 10.1585/pfr.17.1402100

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