激光等离子体密度标长对高能质子加速的影响

Effect of Plasma Density Scale Length on Energetic Protons Generation in Laser-Plasma Interaction

超短超强激光与等离子体相互作用中产生的高能质子在激光惯性约束核聚变、新型台面质子加速器以及医学等研究领域已成为广泛关注的热点。超强激光与等离子体相互作用中密度标长对超热电子或高能质子加速影响很大,所以为了确定超热电子或高能质子的加速机制,需要确定等离子体的密度标长。利用粒子模型(PIC)法得到的模拟结果研究了超强激光与等离子体相互作用中高能质子产生的物理机制以及前表面等离子体密度标长对超热电子或高能质子加速的影响。

Studies on the high energy ion beams generated in ultra-intense laser-plasma interactions have made considerable progress recently due to the development of high power laser technologies, such as fast ignition of inertial confinement fusion, tabletop proton accelerators, and medical applications. Now the research of energetic proton is one of the hotspots. During ultra-intense laser-plasma interaction, the effect of plasma density scale length on accelerated hot electrons and high energy proton is great. Therefore, in order to know the hot electrons or high-energy proton acceleration mechanisms, it is necessary to determine the density of the plasma density scale length. We discuss the generation mechanisms, beam characteristics, diagnostics, potential applications and recent studies of high energy particles, especially protons, produced by irradiating solid targets with ultra-intense laser pulses.