All-optical generation of petawatt gamma radiation via inverse Compton scattering from laser interaction with tube target

作者：Long, T. Y.; Zhou, C. T.^*; Huang, T. W.; Jiang, K.; Ju, L. B.; Zhang, H.; Cai, T. X.; Yu, M. Y.; Qiao, B.; Ruan, S. C.; He, X. T.

来源：Plasma Physics and Controlled Fusion, 2019, 61(8): 085002.

DOI：10.1088/1361-6587/ab210c

• gamma radiation
• inverse Compton scattering
• structured target
• direct laser acceleration
• quantum electrodynamics
• laser-plasma interaction

A scheme for generating gamma photons from laser interaction with a hollow-tube target filled with near-critical-density plasma is investigated using quantum electrodynamics particle-in-cell simulation. The solid-density tube wall stabilizes the laser propagation in the tube, guides the laser-accelerated relativistic electrons, and its endplate reflects the laser light. As the electrons collide head-on with the reflected laser, a large number of MeV gamma photons are generated through inverse Compton scattering. It is found that bright gamma radiation with power up to 1.4 PW and 37% laser-to-gamma ray energy conversion efficiency can be obtained with 5 x 10(22) W cm(-2) laser pulse.

• 单位
  北京大学; 深圳技术大学; 深圳大学; 浙江大学; 上海交通大学; 中国工程物理研究院