Impact of the Upstream Plasma Parameters on the Spectroscopic Measurement in the GAMMA 10/PDX Divertor Simulation Experiments

Takayuki YOKODO; Yousuke NAKASHIMA; Akiyoshi HATAYAMA; Takaaki IIJIMA; Md. Shahinul ISLAM; Tsubasa YOSHIMOTO; Kazuya ICHIMURA; Md. Maidul ISLAM; Guanyi LEE; Sotaro YAMASHITA; Akihiro TERAKADO; Kunpei NOJIRI; Masayuki YOSHIKAWA; Junko KOHAGURA; Naomichi EZUMI; Mizuki SAKAMOTO; Tsuyoshi IMAI

doi:10.1585/pfr.13.3402032

Regular Articles

Impact of the Upstream Plasma Parameters on the Spectroscopic Measurement in the GAMMA 10/PDX Divertor Simulation Experiments

Takayuki YOKODO, Yousuke NAKASHIMA, Akiyoshi HATAYAMA, Takaaki IIJIMA, Md. Shahinul ISLAM, Tsubasa YOSHIMOTO, Kazuya ICHIMURA, Md. Maidul ISLAM, Guanyi LEE, Sotaro YAMASHITA, Akihiro TERAKADO, Kunpei NOJIRI, Masayuki YOSHIKAWA, Junko KOHAGURA, Naomichi EZUMI, Mizuki SAKAMOTO, Tsuyoshi IMAI

Author information

Takayuki YOKODO
Plasma Research Center, University of Tsukuba
Yousuke NAKASHIMA
Plasma Research Center, University of Tsukuba
Akiyoshi HATAYAMA
Graduate School of Science and Technology, Keio University
Takaaki IIJIMA
Plasma Research Center, University of Tsukuba
Md. Shahinul ISLAM
Plasma Research Center, University of Tsukuba
Tsubasa YOSHIMOTO
Plasma Research Center, University of Tsukuba
Kazuya ICHIMURA
Graduate School of Engineering, Kobe University
Md. Maidul ISLAM
Plasma Research Center, University of Tsukuba
Guanyi LEE
Plasma Research Center, University of Tsukuba
Sotaro YAMASHITA
Plasma Research Center, University of Tsukuba
Akihiro TERAKADO
Plasma Research Center, University of Tsukuba
Kunpei NOJIRI
Plasma Research Center, University of Tsukuba
Masayuki YOSHIKAWA
Plasma Research Center, University of Tsukuba
Junko KOHAGURA
Plasma Research Center, University of Tsukuba
Naomichi EZUMI
Plasma Research Center, University of Tsukuba
Mizuki SAKAMOTO
Plasma Research Center, University of Tsukuba
Tsuyoshi IMAI
Plasma Research Center, University of Tsukuba

Keywords: GAMMA 10/PDX, divertor, spectroscopic measurement, noble gas, impurity transport

JOURNAL FREE ACCESS

2018 Volume 13 Pages 3402032

DOI https://doi.org/10.1585/pfr.13.3402032

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Abstract

Detailed results of spectral measurements in the gas injection performed in GAMMA 10/PDX divertor simulation experiments are presented. From the comparison of the emission intensity at the end-cell and plug/barrier-cell, impurity behavior along the magnetic field line is discussed in GAMMA 10/PDX. The emission intensity of Ar II is decreased due to the increase in the background plasma density and the end loss particle flux, which consequently suppresses the Ar particle transport towards the upstream region. The ECH in the plug-cell (EP-ECH) was applied to investigate the influence of the heating on the emission of injected impurities. Ar II intensity slightly increased EP-ECH. On the other hand, Kr II and Xe II decreased at the plug/barrier-cell.

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