Generating "Superponderomotive" Electrons due to a Non-Wake-Field Interaction between a Laser Pulse and a Longitudinal Electric Field
Generating "Superponderomotive" Electrons due to a Non-Wake-Field Interaction between a Laser Pulse and a Longitudinal Electric Field
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DOI：
10.1103/physrevlett.111.065002
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发表时间：
2013-08-05
影响因子：
8.6
通讯作者：
Neely, D.
中科院分区：
文献类型：
--
作者：
Robinson, A. P. L.;Arefiev, A. V.;Neely, D.
结果表明，当激光脉冲和纵向电场通过非尾场机制与电子相互作用时，可以产生动量超过“自由电子”极限m（e）ca（0）（2）/2的电子.该机制包括两个阶段：通过电场加速区降低电子退相速率γ- p（x）/m（e）c和通过洛伦兹力由激光加速电子。这种机制原则上可以产生纵向动量是m（e）ca（0）（2）/2的重要倍数的电子。一个相对简单的激光-等离子体相互作用的二维粒子模拟表明，产生的superponderomotive电子的强烈影响，这种“antidesphase”的机制。
It is shown that electrons with momenta exceeding the "free electron'' limit of m(e)ca(0)(2)/2 can be produced when a laser pulse and a longitudinal electric field interact with an electron via a non-wake-field mechanism. The mechanism consists of two stages: the reduction of the electron dephasing rate gamma - p(x)/m(e)c by an accelerating region of electric field and electron acceleration by the laser via the Lorentz force. This mechanism can, in principle, produce electrons that have longitudinal momenta that is a significant multiple of m(e)ca(0)(2)/2. 2D particle-in-cell simulations of a relatively simple laser-plasma interaction indicate that the generation of superponderomotive electrons is strongly affected by this "antidephasing'' mechanism.