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A comparison of the kinetic and 2 electron fluid models of the collisional Weibel instability in laser-plasmas

E M Epperlein1985年Plasma Physics and Controlled FusionIF 2.2出版社

A new model is developed for the collisional Weibel instability based upon a Cartesian tensor expansion of the electron Fokker-Planck equation. Its results are substantially different from those predicted by an equivalent 2 electron fluid model (Mochizuki et al. 1980). Growth rates ( approximately 1011 s-1) and optimum wavelengths ( approximately 10 mu m) correlate well with experimental observations of filamentary structures in laser-plasmas. The model suggests that the instability may disrupt implosion symmetry, particularly for high-Z targets irradiated by short wavelength lasers.

日本語訳

衝突性ワイベル不安定性に対する新しいモデルが、電子フォッカー・プランク方程式のカルテシアンテンソル展開に基づいて開発された。その結果は、同等の2流体電子モデル(Mochizuki et al. 1980)によって予測されたものと実質的に異なる。成長率(約10^11 s^-1)および最適波長(約10 μm)は、レーザープラズマ中のフィラメント構造の実験的観測とよく一致する。このモデルは、特に短波長レーザーで照射された高Zターゲットにおいて、この不安定性が爆縮対称性を乱す可能性があることを示唆している。

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Weibel instability
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