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Electron Bernstein wave heating via the slow X-B mode conversion process with direct launching from the high field side in LHD
http://hdl.handle.net/10655/3042
http://hdl.handle.net/10655/3042523e93b3-3890-4c17-8f8f-d0c0c5610acd
Item type | 研究報告書 / Research Paper(1) | |||||||||||||||||||||||||||||||||||||||||
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公開日 | 2010-02-05 | |||||||||||||||||||||||||||||||||||||||||
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タイトル | Electron Bernstein wave heating via the slow X-B mode conversion process with direct launching from the high field side in LHD | |||||||||||||||||||||||||||||||||||||||||
言語 | en | |||||||||||||||||||||||||||||||||||||||||
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言語 | eng | |||||||||||||||||||||||||||||||||||||||||
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資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||||||||||||||||||||||||||||||||||||||
資源タイプ | research report | |||||||||||||||||||||||||||||||||||||||||
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アクセス権 | metadata only access | |||||||||||||||||||||||||||||||||||||||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||||||||||||||||||||||||||||||||
著者 |
"Igami, H.
× "Igami, H.
× Yoshimura, Y.
× Kubo, S.
× Shimozuma, T.
× Takahashi, H.
× Akiyama, T.
× Takahashi, C.
× Nagaoka, K.
× Minami, T.
× Matsuoka, K.
× Okamura, S.
× Tanaka, H.
× Nagasaki, K.
× Inagaki, S.
× Mutoh, T.
× Komori, A.
× the, LHD experimental group
× the, CHS experimental group"
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抄録 | ||||||||||||||||||||||||||||||||||||||||||
内容記述タイプ | Abstract | |||||||||||||||||||||||||||||||||||||||||
内容記述 | "In the large helical device (LHD), direct oblique launching of the extraordinary (X-) mode from the high magnetic field side is available without installation of any additional mirror or installation of a launcher in the inner side of the torus. The launched X-mode first encounters the electron cyclotron resonance (ECR) layer from the high magnetic field side and then approaches the upper hybrid resonance (UHR) layer where mode conversion from the X-mode to electron Bernstein wave (EBW) occurs. Complete power absorption with a finite parallel component of the refractive index is promising whether the launched wave power is absorbed as the electromagnetic X-mode or is absorbed as electrostatic EBW even in the peripheral region. In the experiment, strong power absorption has been observed by direct oblique launching of the X-mode. Observation of the parametric decay wave suggests a fraction of the launched power reached the UHR layer that is located near the plasma boundary. The result of numerical analysis with three dimensional ray-tracing calculation using the dispersion equation in hot plasmas suggests that the launched X-mode is refracted toward the magnetic axis and strongly absorbed very close to the ECR layer that is located around ρ~0.5. The main part of the launched power is absorbed as the X-mode in the ECR layer where the electron temperature is sufficient high, while a fraction of the power reaches the UHR that is located in almost the plasma boundary." | |||||||||||||||||||||||||||||||||||||||||
書誌情報 |
en : Research Report NIFS-Series 発行日 2008-10-01 |
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報告書番号 | ||||||||||||||||||||||||||||||||||||||||||
NIFS-903 | ||||||||||||||||||||||||||||||||||||||||||
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収録物識別子タイプ | ISSN | |||||||||||||||||||||||||||||||||||||||||
収録物識別子 | 0915-633X |