Enhanced Multi-MeV Photon Emission by a Laser-Driven Electron Beam in a Self-Generated Magnetic Field

被引：178

作者：

Stark, D. J. ^{[1
]}

Toncian, T. ^{[2
]}

Arefiev, A. V. ^{[1
,2
]}

机构：

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

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

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 18期

基金：

英国工程与自然科学研究理事会;

关键词：

COMPTON BACKSCATTERING;

D O I：

10.1103/PhysRevLett.116.185003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use numerical simulations to demonstrate that a source of collimated multi-MeV photons with high conversion efficiency can be achieved using an all-optical single beam setup at an intensity of 5 x 10(22) W/cm(2) that is already within reach of existing laser facilities. In the studied setup, an unprecedented quasistatic magnetic field (0.4 MT) is driven in a significantly overdense plasma, coupling three key aspects of laser-plasma interactions at high intensities: relativistic transparency, direct laser acceleration, and synchrotron photon emission. The quasistatic magnetic field enhances the photon emission process, which has a profound impact on electron dynamics via radiation reaction and yields tens of TW of directed MeV photons for a PW-class laser.

引用

页数：5

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