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Potential of the ITER electron cyclotron equatorial launcher for heating and current drive at nominal and reduced fields

D. Farina, M. Henderson, L. Figini, G. Ramponi, G. Saibene2012年被引用 21Nuclear FusionIF 3出版社

Electron cyclotron (EC) heating and current drive (HCD), at 170 GHz, 20 MW, is one of the heating systems foreseen to assist and sustain the development of various ITER scenarios since the early phase of ITER. It is usually assumed that EC is efficient only at magnetic fields operating around full field (5.3 T) and half field (2.65 T), and most of the analyses presented so far have focused on the ECRH&CD performances at flat-top. Here, the EC capabilities are investigated for different plasma parameters corresponding to different phases of the ITER plasma discharge, from current ramp-up up to burn, and for a wide range of magnetic fields, focusing in particular on the EC potential for heating and for L- to H-mode assist. It is found that the EC system can contribute to a wide range of heating scenarios during the ramp-up of the magnetic field, significantly increasing the applicable range as a function of magnetic field as compared with traditional views.

日本語訳

電子サイクロトロン(EC)加熱および電流駆動(HCD)は、170 GHz、20 MWで、ITERの初期段階から様々なITERシナリオの開発を支援・持続するために計画されている加熱システムの一つである。通常、ECは全磁場(5.3 T)および半磁場(2.65 T)でのみ効率的であると想定されており、これまでに提示された解析のほとんどは、フラットトップにおけるECRH&CD性能に焦点を当ててきた。ここでは、ECの能力を、ITERプラズマ放電の電流ランプアップからバーンアップまでの異なる位相に対応する異なるプラズマパラメータ、および広範囲の磁場に対して調査し、特に加熱およびL-H遷移支援におけるECの可能性に焦点を当てる。その結果、ECシステムは、従来の見解と比較して、適用可能な磁場範囲を大幅に拡張し、磁場ランプアップ中の幅広い加熱シナリオに貢献できることが見出された。

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