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利用PIC(particle-in-cell)方法模拟研究了超短强激光与锥型三明治结构靶相互作用快电子束的产生和传输,并与锥通道靶、锥丝靶和锥靶在相同激光参数下的作用结果进行了比较.研究发现强激光与锥三明治靶作用产生的快电子能被不同密度材料产生的准静态界面强磁场有效地准直传输.相对其他三种锥型结构靶,锥三明治靶能产生更多数目及更高能量的快电子,提高了激光到快电子的能量转换效率和快电子束的品质,这对快点火能量沉积是有利的.
Using PIC (particle-in-cell) method to simulate the generation and transmission of fast electron beam interaction between ultra-short laser and conical sandwich structure target, and with the same laser parameters of cone channel target, cone wire target and cone target The results show that the fast electrons generated by the strong laser and the conical sandwich can be effectively collimated and transported by the quasi-static interface strong magnetic field generated by different density materials.Compared with the other three conical structure targets, the conical sandwich target Fast electrons, which produce a greater number and higher energy, increase the energy conversion efficiency of laser-to-fast electrons and the quality of fast electron beams, which is advantageous for rapid ignition energy deposition.