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Inference of the microwave absorption coefficient from stray radiation measurements in Wendelstein 7-X

D. Moseev, H.P. Laqua, S. Marsen, N. Marushchenko, T. Stange, H. Braune, F. Gellert, M. Hirsch, U. Hoefel, J. Knauer2017年被引用 8Nuclear FusionIF 3出版社

The efficiency of electron cyclotron heating is determined by the microwave absorption of the plasma. Good microwave absorption is also crucial for the machine safety. In this paper we present a method of evaluating the microwave absorption coefficient from stray radiation measurements. The discussed method is computationally simple and can be applied potentially in real time. Evolution of the second harmonic extraordinary mode (X2) microwave absorption coefficient in Wendelstein 7-X during the start-up phase is presented, as well as an estimate of the absorption coefficient for the second harmonic ordinary mode (O2) wave.

日本語訳

電子サイクロトロン加熱の効率は、プラズマのマイクロ波吸収によって決定される。良好なマイクロ波吸収は、装置の安全性にとっても極めて重要である。本論文では、迷走放射測定からマイクロ波吸収係数を評価する方法を提示する。議論される方法は計算的に単純であり、潜在的にはリアルタイムで適用可能である。Wendelstein 7-Xにおける立ち上げ段階中の第2高調波異常モード(X2)マイクロ波吸収係数の時間発展とともに、第2高調波通常モード(O2)波の吸収係数の推定値を提示する。

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