Enhanced photon emission and pair production in laser-irradiated plasmas

Feng WAN (弯峰); Chong LV (吕冲); Moran JIA (贾默然); Baisong XIE (谢柏松)

doi:10.1088/2058-6272/aa64ed

Plasma Science and Technology > 2017 > 19(7): 75201-075201. > DOI: 10.1088/2058-6272/aa64ed

Feng WAN (弯峰), Chong LV (吕冲), Moran JIA (贾默然), Baisong XIE (谢柏松). Enhanced photon emission and pair production in laser-irradiated plasmas[J]. Plasma Science and Technology, 2017, 19(7): 75201-075201. DOI: 10.1088/2058-6272/aa64ed

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Enhanced photon emission and pair production in laser-irradiated plasmas

1 Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, People’s Republic of China 2 Beijing Radiation Center, Beijing 100875, People’s Republic of China

Funds: This work was supported by National Natural Science Foundation of China (NSFC) under Grant No. 11475026.

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Abstract

Abstract

Enhanced photon emission and pair production due to heavy ion mass in the interaction of an ultraintense laser with overdense plasmas is explored by particle-in-cell simulation. It is found that plasmas with heavier ion mass can excite a higher and broader electrostatic field, which causes the enhancement of backward photon emission. The pair yields are then enhanced due to the increase of backwards photons colliding with the incoming laser pulse. By examining the density evolution and angle distribution of each particle species, the origin of pair yield enhancement is clarified.
- laser-plasma interaction physics,
- γ-ray and particle generation,
- positron emission,
- PIC simulation

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