Photon emission by bremsstrahlung and nonlinear Compton scattering in the interaction of ultraintense laser with plasmas*
1 College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P.R. China
2 Beijing Radiation Center, Beijing 100875, P.R. China
Received: 23 December 2016
Received in final form: 6 April 2017
Published online: 12 September 2017
A Monte Carlo algorithm describing the bremsstrahlung of energetic electrons is implemented into a particle-in-cell code, and used for studies of laser plasma interactions. The simulations are performed for laser pulses of different intensities interacting with low-Z or high-Z targets. The relative strength of photon emission from bremsstrahlung and nonlinear Compton scattering is compared. The nonlinear Compton scattering dominates at ultra-high intensities (I ≥ 1022 W / cm2) and thin high Z targets, while the bremsstrahlung emission makes a comparable contribution at lower laser intensities.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2017