反常趋肤效应理论研究  

Study on Anomalous Skin Effect with Fourier Transformation

作　　者：马国彬 谭维翰[1] 

机构地区：[1]中国科学院上海光机所,上海大学物理系

出　　处：《中国激光》1996年第4期315-320,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金

摘　　要：借助等离子体色散函数．在傅里叶变换的基础上，建立了描述高强度超短脉冲激光与稠密等离子体作用中正常及反常趋肤效应的简化物理模型。采用此模型，等离子体中激光场的幅度可用电导显含地表示．正常及反常趋肤效应可用一个方程描述。与文献相比，此模型计算量大大减小，且物理意义较为明晰。对相同的参数，计算结果与文献一致，对文献未曾研究过的参数区域（比如靶层深处）．计算发现，即使对不随速度变化的碰撞频率，由于反常趋肤效应．激光场的穿透深度也明显增大。此外．还研究了碰撞频率对反常趋肤效应的影响。In this peper, we present a new method based on Fourier transformation to studythe skin effects in the interaction of short laser pulses with dense plasmas.With thismethod.the field amplitude in a plasma can be lepresented explicitly in terms of electricconductivity. The normal and anomalous skin effects can be described through one equationby omitting the plasma dispersion function or by including it in the conductivity. The resultsare in Weement with other Publications(e.g.J.P.Matte and K.Aguenaou,Phes.Rad.A,1992,45:2558)for equivalent parameters.But for deeper POSitions inside a target,which have not been studied Set,we have found that the field amplitude is considerablyenhanced due to the anomalous skin effect,even for constant collision frequency. Inaddition, we also present some Calculation results of anomalous skin effect for differentcollision frequencies.

关 键 词：趋肤效应 短脉冲激光 等离子体 

分 类 号：O53[理学—等离子体物理]