ECW/EBW heating and current drive experiment results and prospects for CW operation in QUEST

Hiroshi Idei; Hideki Zushi; Kazuaki Hanada; Evgeniya Kalinnikova; Kazuo Nakamura; Akihide Fujisawa; Yoshihiko Nagashima; Makoto Hasegawa; Keisuke Matsuoka; Tsuyoshi Kariya; Tsuyoshi Imai; Ryutaro Minami; Naoaki Yoshida; Mizuki Sakamoto; Hideo Watanabe; Kazutoshi Tokunaga; Akira Ejiri; Masatsugu Sakaguchi; Masaki Ishiguro; Saya Tashima; Atsushi Fukuyama; Hiroe Igami; Shin Kubo; Mitsutaka Isobe; Kenichi Nagaoka; Hideya Nakanishi; Nobuhiro Nishino; Shoji Kawasaki; Hisatoshi Nakashima; Aki Higashijima; Yuichi Takase; Takashi Maekawa; Osamu Mitarai; Mitsuru Kikuchi; Kazuo Toi

doi:10.1585/pfr.7.2402112

ECW/EBW heating and current drive experiment results and prospects for CW operation in QUEST

Hiroshi Idei, Hideki Zushi, Kazuaki Hanada, Evgeniya Kalinnikova, Kazuo Nakamura, Akihide Fujisawa, Yoshihiko Nagashima, Makoto Hasegawa, Keisuke Matsuoka, Tsuyoshi Kariya, Tsuyoshi Imai, Ryutaro Minami, Naoaki Yoshida, Mizuki Sakamoto, Hideo Watanabe, Kazutoshi Tokunaga, Akira Ejiri, Masatsugu Sakaguchi, Masaki Ishiguro, Saya TashimaAtsushi Fukuyama, Hiroe Igami, Shin Kubo, Mitsutaka Isobe, Kenichi Nagaoka, Hideya Nakanishi, Nobuhiro Nishino, Shoji Kawasaki, Hisatoshi Nakashima, Aki Higashijima, Yuichi Takase, Takashi Maekawa, Osamu Mitarai, Mitsuru Kikuchi, Kazuo Toi

Division of Nuclear Fusion Dynamics

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

11 Citations (Scopus)

Abstract

A CW phased-array antenna system for electron cyclotron/Bernstein wave heating and current drive (ECWH/CD, EBWH/CD) experiments was developed in the QUEST. The antenna was designed to excite an elliptically polarized pure O-mode wave in oblique injection for the O-X-B mode conversion scenario, and its good performance was confirmed at a high power level. Long pulse discharges with a plasma current of 10 kA and 15 kA were non-inductively attained for 37 s and 20 s, respectively, with only radio frequency (RF) power. Divertor configurationswere also obtained in the RF-sustained plasmas. A new operational window for sustained plasma current was observed in the high-density plasma with a higher RF incident power. Two new heating and current drive systems with an 8.56GHz klystron and a 28GHz gyrotron are being prepared to conduct CW EBWH/CD experiments in the high-density plasma.

Original language	English
Article number	2402112
Journal	Plasma and Fusion Research
Volume	7
Issue number	SPL.ISS.1
DOIs	https://doi.org/10.1585/pfr.7.2402112
Publication status	Published - 2012

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1585/pfr.7.2402112

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Idei, H., Zushi, H., Hanada, K., Kalinnikova, E., Nakamura, K., Fujisawa, A., Nagashima, Y., Hasegawa, M., Matsuoka, K., Kariya, T., Imai, T., Minami, R., Yoshida, N., Sakamoto, M., Watanabe, H., Tokunaga, K., Ejiri, A., Sakaguchi, M., Ishiguro, M., ... Toi, K. (2012). ECW/EBW heating and current drive experiment results and prospects for CW operation in QUEST. Plasma and Fusion Research, 7(SPL.ISS.1), Article 2402112. https://doi.org/10.1585/pfr.7.2402112

Idei, H, Zushi, H, Hanada, K, Kalinnikova, E, Nakamura, K, Fujisawa, A , Nagashima, Y , Hasegawa, M, Matsuoka, K, Kariya, T, Imai, T, Minami, R, Yoshida, N, Sakamoto, M, Watanabe, H , Tokunaga, K, Ejiri, A, Sakaguchi, M, Ishiguro, M, Tashima, S, Fukuyama, A, Igami, H, Kubo, S, Isobe, M, Nagaoka, K, Nakanishi, H, Nishino, N, Kawasaki, S, Nakashima, H, Higashijima, A, Takase, Y, Maekawa, T, Mitarai, O, Kikuchi, M & Toi, K 2012, 'ECW/EBW heating and current drive experiment results and prospects for CW operation in QUEST', Plasma and Fusion Research, vol. 7, no. SPL.ISS.1, 2402112. https://doi.org/10.1585/pfr.7.2402112

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title = "ECW/EBW heating and current drive experiment results and prospects for CW operation in QUEST",

abstract = "A CW phased-array antenna system for electron cyclotron/Bernstein wave heating and current drive (ECWH/CD, EBWH/CD) experiments was developed in the QUEST. The antenna was designed to excite an elliptically polarized pure O-mode wave in oblique injection for the O-X-B mode conversion scenario, and its good performance was confirmed at a high power level. Long pulse discharges with a plasma current of 10 kA and 15 kA were non-inductively attained for 37 s and 20 s, respectively, with only radio frequency (RF) power. Divertor configurationswere also obtained in the RF-sustained plasmas. A new operational window for sustained plasma current was observed in the high-density plasma with a higher RF incident power. Two new heating and current drive systems with an 8.56GHz klystron and a 28GHz gyrotron are being prepared to conduct CW EBWH/CD experiments in the high-density plasma.",

author = "Hiroshi Idei and Hideki Zushi and Kazuaki Hanada and Evgeniya Kalinnikova and Kazuo Nakamura and Akihide Fujisawa and Yoshihiko Nagashima and Makoto Hasegawa and Keisuke Matsuoka and Tsuyoshi Kariya and Tsuyoshi Imai and Ryutaro Minami and Naoaki Yoshida and Mizuki Sakamoto and Hideo Watanabe and Kazutoshi Tokunaga and Akira Ejiri and Masatsugu Sakaguchi and Masaki Ishiguro and Saya Tashima and Atsushi Fukuyama and Hiroe Igami and Shin Kubo and Mitsutaka Isobe and Kenichi Nagaoka and Hideya Nakanishi and Nobuhiro Nishino and Shoji Kawasaki and Hisatoshi Nakashima and Aki Higashijima and Yuichi Takase and Takashi Maekawa and Osamu Mitarai and Mitsuru Kikuchi and Kazuo Toi",

year = "2012",

doi = "10.1585/pfr.7.2402112",

language = "English",

volume = "7",

journal = "Plasma and Fusion Research",

issn = "1880-6821",

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T1 - ECW/EBW heating and current drive experiment results and prospects for CW operation in QUEST

AU - Idei, Hiroshi

AU - Zushi, Hideki

AU - Hanada, Kazuaki

AU - Kalinnikova, Evgeniya

AU - Nakamura, Kazuo

AU - Fujisawa, Akihide

AU - Nagashima, Yoshihiko

AU - Hasegawa, Makoto

AU - Matsuoka, Keisuke

AU - Kariya, Tsuyoshi

AU - Imai, Tsuyoshi

AU - Minami, Ryutaro

AU - Yoshida, Naoaki

AU - Sakamoto, Mizuki

AU - Watanabe, Hideo

AU - Tokunaga, Kazutoshi

AU - Ejiri, Akira

AU - Sakaguchi, Masatsugu

AU - Ishiguro, Masaki

AU - Tashima, Saya

AU - Fukuyama, Atsushi

AU - Igami, Hiroe

AU - Kubo, Shin

AU - Isobe, Mitsutaka

AU - Nagaoka, Kenichi

AU - Nakanishi, Hideya

AU - Nishino, Nobuhiro

AU - Kawasaki, Shoji

AU - Nakashima, Hisatoshi

AU - Higashijima, Aki

AU - Takase, Yuichi

AU - Maekawa, Takashi

AU - Mitarai, Osamu

AU - Kikuchi, Mitsuru

AU - Toi, Kazuo

PY - 2012

Y1 - 2012

N2 - A CW phased-array antenna system for electron cyclotron/Bernstein wave heating and current drive (ECWH/CD, EBWH/CD) experiments was developed in the QUEST. The antenna was designed to excite an elliptically polarized pure O-mode wave in oblique injection for the O-X-B mode conversion scenario, and its good performance was confirmed at a high power level. Long pulse discharges with a plasma current of 10 kA and 15 kA were non-inductively attained for 37 s and 20 s, respectively, with only radio frequency (RF) power. Divertor configurationswere also obtained in the RF-sustained plasmas. A new operational window for sustained plasma current was observed in the high-density plasma with a higher RF incident power. Two new heating and current drive systems with an 8.56GHz klystron and a 28GHz gyrotron are being prepared to conduct CW EBWH/CD experiments in the high-density plasma.

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JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

IS - SPL.ISS.1

M1 - 2402112

ER -

ECW/EBW heating and current drive experiment results and prospects for CW operation in QUEST

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