Modelling gamma-ray photon emission and pair production in high-intensity laser-matter interactions
Modelling gamma-ray photon emission and pair production in high-intensity laser-matter interactions
复制标题
DOI：
10.1016/j.jcp.2013.12.007
复制
发表时间：
2014-03-01
影响因子：
4.1
通讯作者：
Bell, A. R.
中科院分区：
文献类型：
--
作者：
Ridgers, C. P.;Kirk, J. G.;Bell, A. R.
在高强度（> 10（21）W cm（-2））激光与物质相互作用中，电子发射的γ射线光子能强烈地影响电子的动力学，并且发射的光子能产生大量的电子-正电子对。我们展示了如何将这些过程可以包括在模拟耦合的Monte Carlo算法描述的排放到一个粒子在细胞的代码。蒙特卡罗算法包括量子校正的光子发射，我们必须包括如果对生产率是正确的确定。在简单的测试问题中，分析了Monte Carlo算法的精度、收敛性和能量守恒性质。(C)2013 Elsevier Inc. All rights reserved.
In high-intensity (>10(21) W cm(-2)) laser-matter interactions gamma-ray photon emission by the electrons can strongly affect the electron's dynamics and copious numbers of electron-positron pairs can be produced by the emitted photons. We show how these processes can be included in simulations by coupling a Monte Carlo algorithm describing the emission to a particle-in-cell code. The Monte Carlo algorithm includes quantum corrections to the photon emission, which we show must be included if the pair production rate is to be correctly determined. The accuracy, convergence and energy conservation properties of the Monte Carlo algorithm are analysed in simple test problems. (C) 2013 Elsevier Inc. All rights reserved.