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Scattering of an electromagnetic wave in a plasma close to a cut-off layer. Application to fluctuation measurements

X L Zou, L Laurent, J M Rax1991年Plasma Physics and Controlled FusionIF 2.2出版社

The problem of wave scattering by fluctuations close to a cut-off layer is investigated. A generalized wavenumber selection rule is introduced. It provides a simple tool for analyzing the localization of scattering and defining which turbulence wavenumbers are at the origin of the observed scattered signal. Moreover, absolutely-calibrated measurements of fluctuation rates can be envisaged. Applications to four diagnostics (one- and two-antennae reflectometry, correlation reflectometry and cross-polarization scattering) are discussed.

日本語訳

遮断層近傍のゆらぎによる波の散乱の問題を調査する。一般化された波数選択則を導入する。これは、散乱の局在性を解析し、観測された散乱信号の起源となる乱流波数を特定するための簡便なツールを提供する。さらに、ゆらぎレベルの絶対較正測定が可能となる。4つの診断法(1アンテナおよび2アンテナ反射測定、相関反射測定、交差偏光散乱)への応用について議論する。

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