Spontaneous emergence of non-planar electron orbits during direct laser acceleration by a linearly polarized laser pulse

被引：21

作者：

Arefiev, A. V. ^{[1
]}

Khudik, V. N. ^{[1
]}

Robinson, A. P. L. ^{[2
]}

Shvets, G. ^{[1
]}

Willingale, L. ^{[3
]}

机构：

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

[2] STFC Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England

[3] Univ Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109 USA

来源：

PHYSICS OF PLASMAS | 2016年 / 23卷 / 02期

关键词：

GENERATION;

D O I：

10.1063/1.4942036

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：

An electron irradiated by a linearly polarized relativistic intensity laser pulse in a cylindrical plasma channel can gain significant energy from the pulse. The laser electric and magnetic fields drive electron oscillations in a plane making it natural to expect the electron trajectory to be flat. We show that strong modulations of the relativistic gamma-factor associated with the energy enhancement cause the free oscillations perpendicular to the plane of the driven motion to become unstable. As a consequence, out of plane displacements grow to become comparable to the amplitude of the driven oscillations and the electron trajectory becomes essentially three-dimensional, even if at an early stage of the acceleration it was flat. The development of the instability profoundly affects the x-ray emission, causing considerable divergence of the radiation perpendicular to the plane of the driven oscillations, while also reducing the overall emitted energy. (C) 2016 AIP Publishing LLC.

引用

页数：9

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