Electron vacuum acceleration in a regime beyond Brunel absorption.
Electron vacuum acceleration in a regime beyond Brunel absorption.
复制标题
DOI：
10.1103/physrevlett.104.135001
复制
发表时间：
2010-04
影响因子：
8.6
通讯作者：
J. Geindre;R. Marjoribanks;P. Audebert
中科院分区：
文献类型：
--
作者：
J. Geindre;R. Marjoribanks;P. Audebert
我们描述了由相对论强度的超快脉冲驱动的激光等离子体中电子加速的新机制，其中空间电荷分离导致激光吸收强烈增强，并产生在真空中向外驱动的 20 MeV (p/m{sub 0}c{approx_equal}40) 电子。一维 PIC 模拟表明，在临界密度附近产生的强烈阿秒脉冲可以将电子向外扫描多个波长的距离。随着相互作用尺度长度的增加，吸收从布鲁内尔体系推广到吸收主要进入能量>>5 MeV的电子的吸收体系。
We describe a new regime of electron acceleration in laser plasmas driven by ultrafast pulses of relativistic intensity, in which space-charge separation leads to strongly enhanced laser absorption and the production of 20 MeV (p/m{sub 0}c{approx_equal}40) electrons driven outward in vacuum. 1D PIC simulations show that intense attosecond pulses generated around critical density can sweep electrons outward over many wavelengths in distance. With increasing interaction scale length, absorption generalizes from the Brunel regime to one in which absorption is primarily into electrons of energy >>5 MeV.