掠入射驱动产生x射线激光的数值模拟

利用一维流体力学数值模拟程序MEDUSA和原子物理程序包，以类镍钼189nm x射线激光为例，对掠入射驱动x射线激光方案进行了研究.掠入射驱动x射线激光方案可以通过调整掠入射角来选择适合的增益区间.与正入射驱动方案相比，掠入射驱动方案加强了驱动激光在增益区内的吸收，提高了驱动激光向x射线激光的转换效率.模拟结果与实验结果符合较好. 关键词： x射线激光 掠入射辐照 激光等离子体

Numerical simulation of x-ray lasers pumped by grazing incidence pulses

Numerical simulation of the Ni-like Mo x-ray laser at 189 nm (4d→4p, J=0→1) pumped by grazing incidence pulses is performed using a modified one-dimensional hydrodynamic code MEDUSA. By comparing the electron density, the electron temperature, and the absorbed laser energy density obtained by the grazing incidence and the normal incidence schemes respectively, it is clearly shown that the absorption efficiency is greatly increased in the grazing incidence scheme due to the increased absorption of driver laser in the gain region.