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The nonlinear theory of the double Mandel'shtam-Brillouin scattering (DSBS) in plasmas

M V Chegotov, V P Silin, V T Tikhonchuk, A A Zozulya1986年Plasma Physics and Controlled FusionIF 2.2出版社

Double Mandel'shtam-Brillouin scattering (DSBS) nonlinear theory in laser-produced plasma is presented. DSBS is characterized by the nonlinear coherent interaction of the pump wave components incident on a plasma and reflected from the critical surface with the scattered Stokes components. The excitation thresholds and the stationary nonlinear states corresponding to the main and the higher scattering modes are examined taking into account the effects of electromagnetic wave absorption and density and temperature inhomogeneity. It is shown, that under strong electromagnetic wave absorption DSBS is generated from the relatively narrow rarefied plasma region. For the principal DSBS mode weak excitation takes place whereas for the higher modes hard excitation regimes are revealed.

日本語訳

レーザー生成プラズマにおけるダブル・マンデリシュタム-ブリルアン散乱(DSBS)の非線形理論を提示する。DSBSは、臨界表面で反射されるポンプ波の成分と、散乱されるストークス成分との非線形コヒーレント相互作用によって特徴づけられる。電磁波の吸収と密度・温度の不均一性の影響を考慮しつつ、主散乱モードおよび高次散乱モードに対応する励起閾値と定常非線形状態を調べる。強い電磁波吸収の下では、DSBSが比較的狭い希薄プラズマ領域から生成されることが示される。主DSBSモードでは弱励起が生じるのに対し、高次モードでは硬励起が明らかになる。

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