Extended locally constant field approximation for nonlinear Compton scattering

被引：116

作者：

Ilderton, A. ^{[1
]}

King, B. ^{[1
]}

Seipt, D. ^{[2
,3
,4
]}

机构：

[1] Univ Plymouth, Ctr Math Sci, Plymouth PL4 8AA, Devon, England

[2] Univ Lancaster, Phys Dept, Lancaster LA1 4YW, England

[3] Cockcroft Inst, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

[4] Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW A | 2019年 / 99卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

RADIATION THEORY; LASER; ELECTRONS; MASS;

D O I：

10.1103/PhysRevA.99.042121

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The locally constant field approximation(LCFA) has to date underpinned the numerical simulation of quantum processes in laser-plasma physics and astrophysics, but its validity has recently been questioned in the parameter regime of current laser experiments. While improvements are needed, literature corrections to the LCFA show inherent problems. Using nonlinear Compton scattering in laser fields to illustrate, we show here how to overcome the problems in LCFA corrections. We derive an LCFA+, which, compared with the full QED result, shows an improvement over the LCFA across the whole photon emission spectrum. We also demonstrate an implementation of our results in the type of numerical code used to design and analyze intense laser experiments.

引用

页数：11

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