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Measurement of stray millimeter-wave radiation from a 70-GHz ECH/ECCD system in Heliotron J
https://repo.qst.go.jp/records/75757
https://repo.qst.go.jp/records/757573da45add-fd29-446e-a0a9-d59d026f4d45
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-05-07 | |||||
| タイトル | ||||||
| タイトル | Measurement of stray millimeter-wave radiation from a 70-GHz ECH/ECCD system in Heliotron J | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Nagasaki, K.
× Nagasaki, K.× Watanabe, S.× Sakamoto, K.× Isayama, Akihiko× Okada, H.× Minami, T.× Kado, S.× Kobayashi, S.× Yamamoto, S.× Ohshima, S.× Konoshima, S.× Mizuuchi, T.× Nakamura, Y.× Ishizawa, A.× Kubo, S.× Igami, H.× Weir, G.× Marushchenko, N.× Isayama, Akihiko |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Stray millimeter-wave radiation from a 70-GHz electron cyclotron heating and current drive (ECH/ECCD) system has been measured in the Heliotron J helical device. Two rotatable diode detectors located at the out- board side ports are used to pick up the stray radiation: one is installed at the ECH launcher port and the other is installed at a toroidal angle of 135 deg far from the ECH launcher port. Both detectors are rotated to measure the polarization of the stray radiation. The results show that at the toroidal position far from the ECH launcher, the polarization is not fully randomized before plasma breakdown, whereas the polarization is uniform after a quasi- stationary plasma is generated. The polarization near the ECH launcher is not uniform even in a quasi-stationary plasma. Plasma experiments scanning the electron density indicate that the EC power absorption estimated from the stray radiation at the toroidal position far from the ECH launcher is correlated with the single-pass ab- sorption rate calculated by the TRAVIS ray-tracing code. These results indicate that the diagnostic using a simple diode detector can be used as a real-time monitor of EC power absorption only when the plasma with finite density is produced and the detector is placed far from the ECH launcher port. | |||||
| 書誌情報 |
Fusion Engineering and Design 巻 144, p. 40-45, 発行日 2019-05 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0920-3796 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.fusengdes.2019.04.051 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.sciencedirect.com/science/article/pii/S092037961930585X | |||||
