Generation and control of high intermittent heat load pattern for divertor simulation studies in GAMMA 10 tandem mirror

Ryutaro Minami; Tsuyoshi Imai; Tsuyoshi Kariya; Tomoharu Numakura; Taku Eguchi; Ryo Kawarasaki; Kazuhiro Nakazawa; Takaki Kato; Fumiya Sato; Hirotaka Nanzai; Makoto Uehara; Yoichi Endo; Mafumi Hirata; Makoto Ichimura; Ryuya Ikezoe; Isao Katanuma; Junko Kohagura; Yousuke Nakashima; Kensuke Oki; Mizuki Sakamoto; Masayuki Yoshikawa

doi:10.1585/pfr.9.3402116

Generation and control of high intermittent heat load pattern for divertor simulation studies in GAMMA 10 tandem mirror

Ryutaro Minami, Tsuyoshi Imai, Tsuyoshi Kariya, Tomoharu Numakura, Taku Eguchi, Ryo Kawarasaki, Kazuhiro Nakazawa, Takaki Kato, Fumiya Sato, Hirotaka Nanzai, Makoto Uehara, Yoichi Endo, Mafumi Hirata, Makoto Ichimura, Ryuya Ikezoe, Isao Katanuma, Junko Kohagura, Yousuke Nakashima, Kensuke Oki, Mizuki SakamotoMasayuki Yoshikawa

Research output: Contribution to journal › Article › peer-review

Abstract

Development of high power gyrotrons and electron cyclotron heating (ECH) systems for the power modulation experiments in GAMMA 10 have been started in order to generate and control the high heat flux and to make the ELM (edge localized mode) like intermittent heat load pattern for divertor simulation studies. ECH for potential formation at plug region (P-ECH) produces electron flow with high energy along the magnetic filed line. By modulating the ECH power, we can obtain arbitrary pulse heat load patterns. By changing the on/off timing, we can simulate the ELM intermittent heat pulses. The heat flux factor increases almost linearly with ECH power. An intense axial electron flow with energy from hundreds of eV to a few keV generated by fundamental P-ECH is observed. When ECH is turned off, a short burst appears in the end loss ion current due to the axial drain of the confined plasma.

Original language	English
Article number	3402116
Journal	Plasma and Fusion Research
Volume	9
Issue number	SpecialIssue2
DOIs	https://doi.org/10.1585/pfr.9.3402116
Publication status	Published - 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1585/pfr.9.3402116

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Minami, R., Imai, T., Kariya, T., Numakura, T., Eguchi, T., Kawarasaki, R., Nakazawa, K., Kato, T., Sato, F., Nanzai, H., Uehara, M., Endo, Y., Hirata, M., Ichimura, M., Ikezoe, R., Katanuma, I., Kohagura, J., Nakashima, Y., Oki, K., ... Yoshikawa, M. (2014). Generation and control of high intermittent heat load pattern for divertor simulation studies in GAMMA 10 tandem mirror. Plasma and Fusion Research, 9(SpecialIssue2), [3402116]. https://doi.org/10.1585/pfr.9.3402116

Generation and control of high intermittent heat load pattern for divertor simulation studies in GAMMA 10 tandem mirror. / Minami, Ryutaro; Imai, Tsuyoshi; Kariya, Tsuyoshi; Numakura, Tomoharu; Eguchi, Taku; Kawarasaki, Ryo; Nakazawa, Kazuhiro; Kato, Takaki; Sato, Fumiya; Nanzai, Hirotaka; Uehara, Makoto; Endo, Yoichi; Hirata, Mafumi; Ichimura, Makoto; Ikezoe, Ryuya; Katanuma, Isao; Kohagura, Junko; Nakashima, Yousuke; Oki, Kensuke; Sakamoto, Mizuki; Yoshikawa, Masayuki.

In: Plasma and Fusion Research, Vol. 9, No. SpecialIssue2, 3402116, 2014.

Research output: Contribution to journal › Article › peer-review

Minami, R, Imai, T, Kariya, T, Numakura, T, Eguchi, T, Kawarasaki, R, Nakazawa, K, Kato, T, Sato, F, Nanzai, H, Uehara, M, Endo, Y, Hirata, M, Ichimura, M, Ikezoe, R, Katanuma, I, Kohagura, J, Nakashima, Y, Oki, K, Sakamoto, M & Yoshikawa, M 2014, 'Generation and control of high intermittent heat load pattern for divertor simulation studies in GAMMA 10 tandem mirror', Plasma and Fusion Research, vol. 9, no. SpecialIssue2, 3402116. https://doi.org/10.1585/pfr.9.3402116

Minami, Ryutaro ; Imai, Tsuyoshi ; Kariya, Tsuyoshi ; Numakura, Tomoharu ; Eguchi, Taku ; Kawarasaki, Ryo ; Nakazawa, Kazuhiro ; Kato, Takaki ; Sato, Fumiya ; Nanzai, Hirotaka ; Uehara, Makoto ; Endo, Yoichi ; Hirata, Mafumi ; Ichimura, Makoto ; Ikezoe, Ryuya ; Katanuma, Isao ; Kohagura, Junko ; Nakashima, Yousuke ; Oki, Kensuke ; Sakamoto, Mizuki ; Yoshikawa, Masayuki. / Generation and control of high intermittent heat load pattern for divertor simulation studies in GAMMA 10 tandem mirror. In: Plasma and Fusion Research. 2014 ; Vol. 9, No. SpecialIssue2.

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abstract = "Development of high power gyrotrons and electron cyclotron heating (ECH) systems for the power modulation experiments in GAMMA 10 have been started in order to generate and control the high heat flux and to make the ELM (edge localized mode) like intermittent heat load pattern for divertor simulation studies. ECH for potential formation at plug region (P-ECH) produces electron flow with high energy along the magnetic filed line. By modulating the ECH power, we can obtain arbitrary pulse heat load patterns. By changing the on/off timing, we can simulate the ELM intermittent heat pulses. The heat flux factor increases almost linearly with ECH power. An intense axial electron flow with energy from hundreds of eV to a few keV generated by fundamental P-ECH is observed. When ECH is turned off, a short burst appears in the end loss ion current due to the axial drain of the confined plasma.",

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AU - Imai, Tsuyoshi

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AU - Numakura, Tomoharu

AU - Eguchi, Taku

AU - Kawarasaki, Ryo

AU - Nakazawa, Kazuhiro

AU - Kato, Takaki

AU - Sato, Fumiya

AU - Nanzai, Hirotaka

AU - Uehara, Makoto

AU - Endo, Yoichi

AU - Hirata, Mafumi

AU - Ichimura, Makoto

AU - Ikezoe, Ryuya

AU - Katanuma, Isao

AU - Kohagura, Junko

AU - Nakashima, Yousuke

AU - Oki, Kensuke

AU - Sakamoto, Mizuki

AU - Yoshikawa, Masayuki

PY - 2014

Y1 - 2014

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