论文标题
在Sulf-10 PW Laser的调试实验中，60 MEV质子梁的加速度加速
Acceleration of 60 MeV proton beams in the commissioning experiment of SULF-10 PW laser
论文作者
论文摘要
我们报告了上海超生激光设施（Sulf）的10个PW激光束线中调试阶段的实验结果。峰值功率在目标上达到2.4 PW，而无需在实验过程中进行最后放大。 72 \ pm 9 J的激光能在30 fs脉冲持续时间内直径为〜6μm（FWHM）的焦点，在2.0 \ times 10^{21} w/cm^2附近产生聚焦的峰强度。使用普通铜和塑料靶标进行第一个激光 - 普罗顿加速度实验。通过目标正常护套加速度（TNSA），使用铜箔以4μM的最佳目标厚度（TNSA）实现了最大截止能量最高62.5 MeV的高能量质子梁。对于厚度为纳米厚的塑料靶标，质子切断能量约为20 meV，显示了环状或丝状密度分布。这些实验结果反映了Sulf-10 PW梁线的功能，例如超高强度和相对良好的梁对比度。对这些关键参数的进一步优化正在进行中，其中预计10^{22} -10^{23} w/cm^2的峰值激光强度将支持极端现场物理学的各种实验。
We report the experimental results of the commissioning phase in the 10 PW laser beamline of Shanghai Superintense Ultrafast Laser Facility (SULF). The peak power reaches 2.4 PW on target without the last amplifying during the experiment. The laser energy of 72\pm 9 J is directed to a focal spot of ~6 μm diameter (FWHM) in 30 fs pulse duration, yielding a focused peak intensity around 2.0 \times 10^{21} W/cm^2. First laser-proton acceleration experiment is performed using plain copper and plastic targets. High-energy proton beams with maximum cut-off energy up to 62.5 MeV are achieved using copper foils at the optimum target thickness of 4 μm via target normal sheath acceleration (TNSA). For plastic targets of tens of nanometers thick, the proton cut-off energy is approximately 20 MeV, showing ring-like or filamented density distributions. These experimental results reflect the capabilities of the SULF-10 PW beamline, e.g., both ultrahigh intensity and relatively good beam contrast. Further optimization for these key parameters is underway, where peak laser intensities of 10^{22}-10^{23} W/cm^2 are anticipated to support various experiments on extreme field physics.
