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Scattering of electromagnetic waves by a nonuniform cylindrical plasma in the eikonal approximation

S K Sharma, B Dasgupta1987年Plasma Physics and Controlled FusionIF 2.2出版社

The scattering of a uniform plane electromagnetic wave form an inhomogeneous cylindrical plasma in the presence of an axial static magnetic field has been treated in the eikonal approximation. A simple expression is presented for the scattering function for ordinary wave scattering. This expression is expected to be a good approximation at small angles and for refractive indices close to unity ( omega 2<< omega p2). In order to show the accuracy of the eikonal approximation numerical comparisons with the exact results have been presented for the simple model of homogeneous plasma. Implications of the eikonal results in the plasma diagnostics have been discussed.

日本語訳

一様な平面電磁波が、軸方向の静磁場の存在下にある不均質な円筒プラズマから散乱される問題が、アイコナール近似を用いて扱われた。通常波の散乱に対する散乱関数の簡潔な表現が提示された。この表現は、小角度かつ屈折率が1に近い場合(ω²≪ωp²)に良い近似となることが期待される。アイコナール近似の精度を検証するため、均質プラズマの単純なモデルに対して厳密解との数値比較が提示された。プラズマ診断におけるアイコナール近似結果の応用について議論された。

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Electromagnetic waves
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