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The pitch angle of the internal magnetic field is obtained using a newly developed method where only sigma-components of the motional stark spectrum are analyzed to avoid difficulty due to the pi-component asymmetry caused by appreciable beam divergence. Radial profiles of intemal poloidal magnetic field and safety factor are successfully obtained in a current ramp-up discharge. The safety factor at the magnetic axis q(0) is about 1.7 just before the current ramp-up and gradually decreases close to unity during the current ramping phase till the appearance of sawtooth oscillations. 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Measurement of Internal Magnetic Field with Motional Stark Polarimetry in Current Ramp-Up Experiments of JIPP T-IIU
http://hdl.handle.net/10655/2312
http://hdl.handle.net/10655/231212ddd29e-89fe-452a-90cf-46f9ee249a45
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 | Measurement of Internal Magnetic Field with Motional Stark Polarimetry in Current Ramp-Up Experiments of JIPP T-IIU | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Tokamak | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Motional Stark Effect Polarimetry | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Internal Poloidal Magnetic Field | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Sawtooth | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Partial Reconnection | |||||
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 |
"Xu, J.
× "Xu, J.× Toi, K.× Kuramoto, H.× Nishizawa, A.× Fujita, J.× Ejiri, A.× Narihara, K.× Seki, T.× Sakakita, H.× Kawahata, K.× Ida, K.× Adachi, K.× Akiyama, R.× Hamada, Y.× Hirokura, S.× Kawasumi, Y.× Kojima, M.× Nomura, I.× Ohdachi, S.× Sato, K.N." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "Multichannel polarization measurements of the Balmer alpha line of beam emission are performed using a 15-channel four-polarizer optical system on the JIPP T-IIU tokamak. The pitch angle of the internal magnetic field is obtained using a newly developed method where only sigma-components of the motional stark spectrum are analyzed to avoid difficulty due to the pi-component asymmetry caused by appreciable beam divergence. Radial profiles of intemal poloidal magnetic field and safety factor are successfully obtained in a current ramp-up discharge. The safety factor at the magnetic axis q(0) is about 1.7 just before the current ramp-up and gradually decreases close to unity during the current ramping phase till the appearance of sawtooth oscillations. In the sawtoothing phase, q(0) is further decreased to be obviously below unity, i.e., 0.7-0.8, which suggests that no complete reconnection of the poloidal magnetic flux takes place at the sawtooth crash." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 1996-06-01 |
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報告書番号 | ||||||
NIFS-419 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |