Universal scalings for laser acceleration of electrons in ion channels

被引：50

作者：

Khudik, Vladimir ^{[1
,2
]}

Arefiev, Alexey ^{[3
]}

Zhang, Xi ^{[1
,2
]}

Shvets, Gennady ^{[1
,2
,4
]}

机构：

[1] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

[2] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA

[3] Univ Texas Austin, Ctr High Energy Dens Sci, Austin, TX 78712 USA

[4] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA

来源：

PHYSICS OF PLASMAS | 2016年 / 23卷 / 10期

关键词：

Phase space methods - Electron energy levels - Electrons - Electromagnetic wave propagation in plasma;

D O I：

10.1063/1.4964901

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We analytically investigate the acceleration of electrons undergoing betatron oscillations in an ion channel, driven by a laser beam propagating with superluminal (or luminal) phase velocity. The universal scalings for the maximum attainable electron energy are found for arbitrary laser and plasma parameters by deriving a set of dimensionless equations for paraxial ultra-relativistic electron motion. One of our analytic predictions is the emergence of forbidden zones in the electrons' phase space. For an individual electron, these give rise to a threshold-type dependence of the final energy gain on the laser intensity. The universal scalings are also generalized to the resonant laser interaction with the third harmonic of betatron motion and to the case when the laser beam is circularly polarized. Published by AIP Publishing.

引用

页数：13

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