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Calculation of prompt loss and toroidal field ripple loss under neutral beam injection on EAST

Bin Wu, Baolong Hao, Roscoe White, Jinfang Wang, Qing Zang, Xiaofeng Han, Chundong Hu2017年Plasma Physics and Controlled FusionIF 2.2出版社

Neutral beam injection is a major auxiliary heating method in the EAST experimental campaign. This paper gives detailed calculations of beam loss with different plasma equilibria using the guiding center code ORBIT and NUBEAM/TRANSP. Increasing plasma current can dramatically lower the beam ion prompt loss and ripple loss. Countercurrent beam injection gives a much larger prompt loss fraction than co-injection, and ripple-induced collisionless stochastic diffusion is the dominant loss channel.

日本語訳

中性ビーム入射は、EAST実験における主要な補助加熱方法である。本論文では、ガイドセンターコードORBITとNUBEAM/TRANSPを用いて、異なるプラズマ平衡状態におけるビーム損失の詳細な計算を行う。プラズマ電流を増加させることで、ビームイオンの即時損失とリップル損失を劇的に低減できることが示された。また、逆方向(カウンター)ビーム入射は、同方向(コ)入射に比べて即時損失割合がはるかに大きく、リップル誘起の無衝突確率拡散が支配的な損失チャネルとなる。

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east高精度(タイトル一致)

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EASTNeutral beamNeutral beam injectionField ripple
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