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On the applicability of the fluid approach to the description of bilinear interaction and scattering of waves in plasmas

H Bindslev1996年Plasma Physics and Controlled FusionIF 2.2出版社

The cold fluid (CF) and the more general low-temperature kinetic (LTK) models of bilinear wave interaction and collective Thomson scattering have been the subject of exhaustive investigations. These have revealed that the CF model is inappropriate for its intended use: the modelling of scattering from thermal fluctuations in the limit where the plasma may be treated as cold for the incident and scattered waves, but not cold for the fluctuations. Assuming the plasma to be cold for the fluctuations would be inconsistent with their thermal nature. In response it has been argued that the CF model is in accord with the LTK model when scattering is from cold collective oscillations. This is true, but irrelevant.

日本語訳

冷流体(CF)モデルと、より一般的な低温動力学(LTK)モデルによる、波動の双一次結合および集団トムソン散乱の記述は、徹底的な研究の対象となってきた。これらの研究により、CFモデルはその意図された用途、すなわち入射波と散乱波に対してプラズマが冷流体として扱われ得る一方で、揺らぎに対しては冷流体として扱われない極限における、熱揺らぎからの散乱のモデル化には不適切であることが明らかにされている。揺らぎに対してプラズマが冷流体であると仮定することは、その熱的性質と矛盾する。これに対して、散乱が冷たい集団的振動からのものである場合には、CFモデルはLTKモデルと一致すると論じられてきた。これは事実ではあるが、無関係である。

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