Scale invariance and scaling law of Thomson backscatter spectra of electrons moving in the resonance regime in combined laser and magnetic fields

被引：12

作者：

Fu, Yi-Jia ^{[1
]}

Jiang, Chun ^{[1
]}

Lv, Chong ^{[1
]}

Wan, Feng ^{[1
]}

Sang, Hai-Bo ^{[1
]}

Xie, Bai-Song ^{[1
,2
]}

机构：

[1] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China

[2] Beijing Radiat Ctr, Beijing 100875, Peoples R China

来源：

PHYSICAL REVIEW A | 2016年 / 94卷 / 05期

基金：

中国国家自然科学基金;

关键词：

HARMONIC-GENERATION; EMISSION SPECTRA; ACCELERATION; SCATTERING; PULSE; DYNAMICS; LIGHT; INTENSITY;

D O I：

10.1103/PhysRevA.94.052102

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The Thomson backscatter spectra by an electron moving in the resonance acceleration regime are derived analytically and computed numerically in the simultaneous presence of a superintense laser field and a strong uniform magnetic field. The dependences of fundamental frequency of harmonic spectra on the laser intensity and magnetic resonance parameter are examined carefully. By calculating the emission of a single electron in a circularly polarized laser field of plane-wave form and a constant external magnetic field, the scale invariance of the radiation spectra is evident in terms of harmonic orders. The scaling law of backscattered spectra is exhibited remarkably for the laser intensity as well as for the initial axial momentum of the electron when the cyclotron frequency of the electron approaches the laser frequency. The results indicate that the magnetic resonance parameter plays an important role in the strength of emission. And the found rich features of backscattering spectra may be useful to the tunability of the radiation source.

引用

页数：8