论文标题
激光质量质子质子加速度与联合气管靶标
Laser-plasma proton acceleration with a combined gas-foil target
论文作者
论文摘要
使用新型的气翼靶标在目标正常护套加速度（TNSA）方向上研究了激光质量质子加速度。该目标旨在达到箔平面上较高的激光强度，这是由于相对论的自我关注和对气体脉冲的自我压缩。使用数值3D粒子中的粒子（PIC）模拟来研究气体中的脉冲传播，显示峰强度增加了近7倍。在实验中，最大质子能表现出对激光通过气体的能量传递的高度依赖性，并且对脉冲的大小和形状的依赖性较小。在高气密度下，激光能量耗竭和脉冲失真抑制了质子能量。在低密度下，观察到自我关注，并用气体测量可比或更高的质子能量。
Laser-plasma proton acceleration was investigated in the Target Normal Sheath Acceleration (TNSA) regime using a novel gas-foil target. The target is designed for reaching higher laser intensity at the foil plane owing to relativistic self-focusing and self compression of the pulse in the gas layer. Numerical 3D particle-in-cell (PIC) simulations were used to study pulse propagation in the gas, showing a nearly seven-fold increase in peak intensity. In the experiment, maximum proton energies showed high dependence on the energy transmission of the laser through the gas and a lesser dependence on the size and shape of the pulse. At high gas densities, laser energy depletion and pulse distortion suppressed proton energies. At low densities, self-focusing was observed and comparable or higher proton energies were measured with the gas.
