Jirka Martin, Klimo Ondrej, Gu Yan-Jun, Weber Stefan
Institute of Physics of the CAS, ELI-Beamlines Project, Na Slovance 2, Prague, 182 21, Czech Republic.
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, Prague, 115 19, Czech Republic.
Sci Rep. 2020 Jun 1;10(1):8887. doi: 10.1038/s41598-020-65778-4.
In this paper we study photon emission in the interaction of the laser beam with an under-dense target and the attached reflecting plasma mirror. Photons are emitted due to the inverse Compton scattering when accelerated electrons interact with a reflected part of the laser pulse. The enhancement of photon generation in this configuration lies in using the laser pulse with a steep rising edge. Such a laser pulse can be obtained by the preceding interaction of the incoming laser pulse with a thin solid-density foil. Using numerical simulations we study how such a laser pulse affects photon emission. As a result of employing a laser pulse with a steep rising edge, accelerated electrons can interact directly with the most intense part of the laser pulse that enhances photon emission. This approach increases the number of created photons and improves photon beam divergence.
在本文中，我们研究了激光束与低密度靶及附着的反射等离子体镜相互作用时的光子发射。当加速电子与激光脉冲的反射部分相互作用时，会因逆康普顿散射而发射光子。这种配置中光子产生的增强在于使用具有陡峭上升沿的激光脉冲。这样的激光脉冲可以通过入射激光脉冲与薄固体密度箔的先前相互作用获得。我们使用数值模拟来研究这样的激光脉冲如何影响光子发射。由于采用了具有陡峭上升沿的激光脉冲，加速电子可以直接与增强光子发射的激光脉冲最强烈部分相互作用。这种方法增加了产生的光子数量并改善了光子束发散度。
