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Electron cyclotron current drive calculated for ITER conditions using different models

N.B. Marushchenko, H. Maassberg, Yu. Turkin2008年被引用 34Nuclear FusionIF 3出版社

The current drive efficiency for the ITER reference scenario 2 has been calculated by the newly developed ray-tracing code TRAVIS for both the upper and the equatorial launchers. For comparison, two adjoint approach models are applied, the high-speed-limit model and a model with the parallel momentum conservation taken into account. It is shown that in the angle range expected as optimal launch angles the momentum conservation correction produces a non-negligible contribution in ECCD, leading to the necessity to revise the previous predictions carefully. Additionally, the scenario with reduced magnetic field is checked. It is shown that the ECCD efficiency (as well as the deposition profile) for the equatorial launcher may be significantly changed due to unwanted absorption at the higher (parasitic) harmonics.

日本語訳

ITER参照シナリオ2における電流駆動効率は、新たに開発されたレイトレーシングコードTRAVISを用いて、上部および赤道面ランチャーの両方について計算された。比較のため、2つの随伴法モデルが適用された。すなわち、高速極限モデルと、平行方向運動量保存を考慮したモデルである。最適な入射角と予想される角度範囲において、運動量保存の補正はECCDにおいて無視できない寄与を生じることが示され、従来の予測を修正する必要性が示された。さらに、低減磁場シナリオについても検証が行われた。その結果、赤道面ランチャーにおけるECCD効率(および堆積プロファイル)は、高次(寄生)高調波における不要な吸収により、有意に変化する可能性があることが示された。

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