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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/10655/3042
523e93b3-3890-4c17-8f8f-d0c0c5610acd
Item type 研究報告書 / Research Paper(1)
公開日 2010-02-05
タイトル
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
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_18ws
資源タイプ research report
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 "Igami, H.

× "Igami, H.

en "Igami, H.

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Yoshimura, Y.

× Yoshimura, Y.

en Yoshimura, Y.

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Kubo, S.

× Kubo, S.

en Kubo, S.

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Shimozuma, T.

× Shimozuma, T.

en Shimozuma, T.

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Takahashi, H.

× Takahashi, H.

en Takahashi, H.

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Akiyama, T.

× Akiyama, T.

en Akiyama, T.

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Takahashi, C.

× Takahashi, C.

en Takahashi, C.

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Nagaoka, K.

× Nagaoka, K.

en Nagaoka, K.

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Minami, T.

× Minami, T.

en Minami, T.

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Matsuoka, K.

× Matsuoka, K.

en Matsuoka, K.

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Okamura, S.

× Okamura, S.

en Okamura, S.

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Tanaka, H.

× Tanaka, H.

en Tanaka, H.

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Nagasaki, K.

× Nagasaki, K.

en Nagasaki, K.

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Inagaki, S.

× Inagaki, S.

en Inagaki, S.

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Mutoh, T.

× Mutoh, T.

en Mutoh, T.

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Komori, A.

× Komori, A.

en Komori, A.

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the, LHD experimental group

× the, LHD experimental group

en the, LHD experimental group

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the, CHS experimental group"

× the, CHS experimental group"

en 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
報告書番号
NIFS-903
ISSN
収録物識別子タイプ ISSN
収録物識別子 0915-633X
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