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Controlling the internal transport barrier oscillations in high-performance tokamak plasmas with a dominant fraction of bootstrap current

J.P.S. Bizarro, X. Litaudon, T.J.J. Tala, JET EFDA Contributors2007年被引用 15Nuclear FusionIF 3出版社

It is shown that relaxation oscillations associated with repetitive internal transport barrier (ITB) buildup and collapse in high-performance, overdriven tokamak plasmas, with ion-cyclotron resonance heating (ICRH), neutral-beam injection (NBI) and lower-hybrid current drive (LHCD), and with a dominant fraction of bootstrap current, can be overcome if the LHCD power is sufficiently high. This result has been obtained using a benchmarked, fully predictive transport model iterated with given ICRH profiles and self-consistently with NBI and LHCD modules, the stabilizing role of the E × B flow shear being combined with that of reversed magnetic shear in the simulation of ITB dynamics.

日本語訳

高性能な過駆動トカマクプラズマにおいて、イオンサイクロトロン共鳴加熱(ICRH)、中性粒子ビーム入射(NBI)、低混成波電流駆動(LHCD)を伴い、かつブートストラップ電流が支配的な割合を占める場合に、内部輸送障壁(ITB)の繰り返し形成と崩壊に伴う緩和振動は、LHCDパワーが十分に高い場合には克服できることが示された。この結果は、与えられたICRHプロファイルと反復計算され、NBIおよびLHCDモジュールと自己無撞着に結合された、ベンチマーク済みの完全予測型輸送モデルを用いて得られたものであり、ITBダイナミクスのシミュレーションにおいて、E × Bフローシアーの安定化効果が反転磁気シアーの安定化効果と組み合わされている。

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Transport barrierInternal transport barrierBootstrap current
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