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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.\"", "subitem_description_type": "Abstract"}]}, "item_5_source_id_10": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0915-633X", "subitem_source_identifier_type": "ISSN"}]}, "item_5_text_25": {"attribute_name": "登録情報", "attribute_value_mlt": [{"subitem_text_value": "Made available in DSpace on 2010-02-05T10:19:29Z (GMT). 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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) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
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 | ||||||
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.× 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" |
|||||
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 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |