Optimisation of multi-petawatt laser-driven proton acceleration in the relativistic transparency regime
Optimisation of multi-petawatt laser-driven proton acceleration in the relativistic transparency regime
复制标题
DOI：
10.1088/1367-2630/ac681f
复制
发表时间：
2022-05-01
影响因子：
3.3
通讯作者：
McKenna, P.
中科院分区：
文献类型：
--
作者：
Goodman, J.;King, M.;McKenna, P.
采用二维和三维粒子模拟方法研究了相对论透明区激光驱动质子从薄膜中加速的过程。最大质子能量的优化和整体的激光到质子的能量转换效率与透明度的发病率进行了研究，线性和圆偏振的激光强度高达2 × 10（23）W cm（-2）。考虑了激光强度分布上升沿和最大激光强度下辐射反应的影响。它被发现，在其中的透明度发生相对于与等离子体相互作用的激光脉冲的峰值的时间是一个定义参数在质子加速的优化，在整个范围内的参数探索。
Laser-driven proton acceleration from ultrathin foils in the relativistic transparency regime is investigated using 2D and 3D particle-in-cell simulations. The optimisation of the maximum proton energy and the overall laser-to-proton energy conversion efficiency with the onset of transparency is investigated for linearly and circularly polarised laser light at intensities up to 2 x 10(23) W cm(-2). The effects of the rising edge of the laser intensity profile and radiation reaction at the most extreme laser intensity are considered. It is found that the time at which transparency occurs relative to the peak of the laser pulse interacting with the plasma is a defining parameter in the optimisation of proton acceleration, over the full range of parameters explored.