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Enhanced microwave pulse backscattering off externally excited lower-hybrid waves

B Brusehaber, M Kramer1995年Plasma Physics and Controlled FusionIF 2.2出版社

Enhanced scattering is a sensitive diagnostic tool for detecting small-scale density fluctuations in small tokamaks as well as in laboratory plasmas with high spatial resolution. It makes use of a hybrid resonance in which the wavenumbers as well as the amplitudes of the incident probe wave and the backscattered wave increase strongly. The pulse (RADAR) modification of the enhanced scattering diagnostic additionally permits the measurement of the wavenumber spectra of the fluctuations. This method is experimentally studied on an RF generated linear discharge at which externally excited lower-hybrid waves serving as test fluctuations are diagnosed.

日本語訳

増強散乱は、高空間分解能で小型トカマクおよび実験室プラズマにおける小さな密度ゆらぎを検出するための高感度な診断手法である。これは、入射プローブ波と後方散乱波の波数および振幅がともに強く増大する混成共鳴を利用する。増強散乱診断のパルス(RADAR)変調により、さらにゆらぎの波数スペクトルの測定が可能となる。本手法は、試験ゆらぎとして外部励起された下混成波を診断対象とするRF生成線状放電において実験的に研究された。

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Lower hybrid
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