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Comparison of ECE spectra as observed from the high- and low-field side

J F M van Gelder, E Westerhof, F C Schüller, A J H Donné1998年Plasma Physics and Controlled FusionIF 2.2出版社

Non-thermal electron cyclotron emission (ECE) spectra are measured by comparison of low-field side and high-field side observed ECE. The asymmetry in the respective spectra can be ascribed to the existence of non-thermal populations. Optical-depth effects are directly determined from electron cyclotron absorption measurements. Measurements are compared with theoretical ECE spectra, obtained on the basis of calculations with a quasi-linear bounce-averaged Fokker-Planck simulation code, including a simple model for radial diffusion. This yields information on the non-thermal population responsible for the measured non-thermal spectra. The good agreement between experiment and simulation corroborates the quasi-linear bounce-averaged Fokker-Planck model.

日本語訳

非熱的電子サイクロトロン放射(ECE)スペクトルは、低磁場側と高磁場側で観測されたECEの比較によって測定される。それぞれのスペクトルにおける非対称性は、非熱的粒子群の存在に起因する。光学的厚さの効果は、電子サイクロトロン吸収測定から直接決定される。測定結果は、径方向拡散の簡単なモデルを含む準線形バウンス平均フォッカー・プランクシミュレーションコードを用いた計算に基づいて得られた理論的なECEと比較される。これにより、測定された非熱的スペクトルの原因となる非熱的粒子群に関する情報が得られる。実験とシミュレーションの間の良い一致は、準線形バウンス平均フォッカー・プランクモデルを裏付けるものである。

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Electron cyclotron emission
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