论文标题
来自近临界等离子体的激光驱动的无碰撞冲击加速度
Laser-driven Collisionless Shock Acceleration of Ions from Near-critical plasmas
论文作者
论文摘要
本文概述了通过1 UM（Omega EP）和10 UM（UCLA Neptune Laboratory）激光器以接近临界密度CH和PLASMAS驱动的静电无碰撞冲击波加速狭窄能量扩散离子光束的加速度。 CH目标中的冲击波产生了高能50 MEV质子（能量扩散<30％）和314 MeV C6+离子（能量传播<10％）。观察质子和碳离子到相似速度的加速度观察与冲击阵线移动电势的反射相一致。对于在气射流中由二氧化碳激光驱动的冲击，检测到离子光谱中的30 meV峰。粒子中的模拟表明，无论目标如何进一步控制其密度曲线，都需要在能量传播，产量和最大动能的一部分中优化加速离子束。
This paper overviews experimental and numerical results on acceleration of narrow energy spread ion beams by an electrostatic collisionless shockwave driven by 1 um (Omega EP) and 10 um (UCLA Neptune Laboratory) lasers in near critical density CH and He plasmas, respectively. Shock waves in CH targets produced high-energy 50 MeV protons (energy spread of <30%) and 314 MeV C6+ ions (energy spread of <10%). Observation of acceleration of both protons and carbon ions to similar velocities is consistent with reflection of particles off the moving potential of a shock front. For shocks driven by CO2 laser in a gas jet, 30 MeV peak in He ion spectrum was detected. Particle-in-cell simulations indicate that regardless of the target further control over its density profile is needed for optimization of accelerated ion beams in part of energy spread, yield and maximum kinetic energy.
