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Measurement of Radiated Power Using an InfraRed Imaging Video Bolometer System in the Upstream of GAMMA 10/PDX Divertor Simulation Plasma

Naoki SHIGEMATSU, Naomichi EZUMI, Kiyofumi MUKAI^1,2), Takumi SETO, Takuma OKAMOTO, Kosuke TAKANASHI, Satoshi TAKAHASHI, Reina MIYAUCHI, Satoshi TOGO, Mafumi HIRATA, Junko KOHAGURA, Masayuki YOSHIKAWA, Ryutaro MINAMI, Yousuke NAKASHIMA and Mizuki SAKAMOTO

Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan

1)

National Institute for Fusion Science, Toki 509-5292, Japan

2)

The Graduate University for Advanced Studies, SOKENDAI Toki 509-5292, Japan

(Received 9 January 2023 / Accepted 26 March 2023 / Published 12 May 2023)

Abstract

Plasma radiation intensity distribution plays a crucial role in the energy balance and impurity transport during plasma detachment. An InfraRed imaging Video Bolometer (IRVB) is a radiation distribution measurement system, that uses an infrared camera to measure the temperature distribution on a thin foil caused by plasma radiation. Herein, an IRVB measurement system is installed in the west plug/barrier cell of the GAMMA10/PDX, which is upstream of the divertor-simulated plasma. In the case of Ar injection, a clear difference is observed in the plasma radiation intensity depending on the incident gas pressure. However, during Ne injection, the difference in the plasma radiation intensity is not clear. Compared with the case of Ne, the radiation intensity is higher when Ar gas was injected.

Copyright (c) 2023 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

radiation, bolometer, IRVB, plasma detachment, divertor, D-module, GAMMA 10/PDX

DOI: 10.1585/pfr.18.2402031

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