双短脉冲驱动的瞬态电子碰撞激发类镍银13.9 nm X光激光

 研究了两个皮秒短脉冲驱动的瞬态电子碰撞激发类镍银13.9 nm X光激光，考察了脉宽分别为1,2,3 ps驱动的情况，分别给出了输出X光激光的角分布特性。模拟表明，(330 ps, 1 ps, 1 ps)驱动条件下，第二短脉冲延迟约500 ps，可以充分利用临界面附近的高增益。通过与相同长脉冲条件下单短脉冲驱动的结果相比较，分析了第一个短脉冲的作用及双脉冲驱动的优点。

Characteristics of transient collisional excited Ni-like Ag 13.9 nm XRL driven by two picosecond pulses

The transient collisional excited Ni-like Ag 13.9 nm X-ray laser was simulated. Driven by two picosecond short pulses preceded by a 330 ps long prepulse, different short pulses of 1 ps, 2 ps and 3 ps were considered and for each case the angular characteristics of the output X-ray laser are presented in this paper. Detailed analysis shows that the (330 ps,1 ps,1 ps) pumping combinations delayed by about 500 ps can extract higher gains near critical surface and it works best. To get the effect of the first short pulse, X-ray lasers driven by only one short pulse following the same long prepulse was simulated and optimization was made. By comparing the optimized case of the two pumping scheme, the advantages of the two short pulses pumping scheme was indicated.