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ECCD calculations in ITER by means of the quasi-optical code

N. Bertelli, A.A. Balakin, E. Westerhof, M.N. Buyanova2010年被引用 11Nuclear FusionIF 3出版社

Electron cyclotron current drive (ECCD) calculations for the case of the ITER electron cyclotron resonant heating upper port launcher are presented making use of a quasi-optical (QO) code (Balakin et al2008 Nucl. Fusion48 065003). The QO code describes accurately the behaviour of the wave beam in the electron cyclotron resonance layer, taking into account spatial inhomogeneity and dispersion. The ECCD efficiency is obtained using the adjoint calculation as presented by (Lin-Liu et al 2003 Phys. Plasmas10 4064). The results show a broadening of the EC driven current density profiles in the range 15–30% as compared with beam-tracing calculations using TORBEAM. Consistently, peak driven current density values are found to be decreased by 10–20%. These results have significant consequences for the determination of the requirements on ECCD power to control magnetohydrodynamic instabilities such as neoclassical tearing modes and sawteeth.

日本語訳

ITERの電子サイクロトロン共鳴加熱用上部ポートランチャーに対する電子サイクロトロン電流駆動(ECCD)の計算結果を、準光学コード(Balakinら2008 Nucl. Fusion48 065023)を用いて提示する。この準光学コードは、電子サイクロトロン共鳴層における波動ビームの挙動を、空間的不均一性と分散を考慮して正確に記述する。ECCD効率は、(Linら2003 Phys. Plasmas10 4064)によって提示された随伴法を用いて算出される。結果は、TORBEAMを用いたビームトレーシング計算と比較して、EC駆動電流密度分布が15〜30%の範囲で広がることを示している。これに対応して、ピーク駆動電流密度の値は10〜20%減少することが見出された。これらの結果は、新古典テアリングモードや鋸歯状振動などの磁気流体力学的不安定性を制御するためのECCDパワーの要件決定に重要な影響を及ぼす。

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ITERElectron cyclotron current drive
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