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A kinematic model of relativistic laser absorption in an overdense plasma

P Gibbon, A A Andreev, K Yu Platonov2012年Plasma Physics and Controlled FusionIF 2.2出版社

An analytical model of laser absorption for planar radiation on steep, high density plasma surfaces is presented. Within the constraints of classical electrodynamics, the model is valid for arbitrary intensity and incidence angle, and is insensitive to the details of the absorption mechanism. At intensities beyond 1020 W cm−2, consistently high (>50%) absorption with a flat angular dependence is found. The model's convenient closed form makes it widely applicable to laser-driven ion acceleration schemes, hard x-ray sources and the fast igniter fusion concept.

日本語訳

高密度で急峻なプラズマ表面における平面放射に対するレーザー吸収の解析モデルを提示する。古典電磁気学の範囲内で、このモデルは任意の強度と入射角に対して有効であり、吸収機構の詳細には依存しない。10^20 W cm^-2を超える強度では、平坦な角度依存性を伴う一貫して高い(>50%)吸収が見られる。このモデルの簡便な閉形式表現により、レーザー駆動イオン加速スキーム、硬X線源、および高速点火核融合概念に広く適用可能である。

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