论文标题
通过激光脉冲从气体喷射靶标产生自旋偏振质子束
Spin polarized proton beam generation from gas-jet targets by intense laser pulses
论文作者
论文摘要
提出了一种通过使用多折线激光器从气流射流产生自旋偏振质子束的方法。通过目前可用的技术，可以从光解结合的卤化氢分子和Petawatt激光器中产生预偏的元素气体，因此可以获得能量〜50 MeV和〜80％极化的质子束。理论上，通过完全自洽的三维粒子模拟对质子的两阶段加速度和旋转动力学进行了研究。我们的结果预测了光束极化对驱动激光脉冲强度的依赖性。明亮的偏振质子束的产生将通过激光驱动的加速器打开极化研究的结构域，并具有潜在的应用，以实现量子染色体动力学探索的有效检测。
A method of generating spin polarized proton beams from a gas jet by using a multi-petawatt laser is put forward. With currently available techniques of producing pre-polarized monatomic gases from photodissociated hydrogen halide molecules and petawatt lasers, proton beams with energy ~ 50 MeV and ~ 80 % polarization are proved to be obtained. Two-stage acceleration and spin dynamics of protons are investigated theoretically and by means of fully self-consistent three dimensional particle-in-cell simulations. Our results predict the dependence of the beam polarization on the intensity of the driving laser pulse. Generation of bright energetic polarized proton beams would open a domain of polarization studies with laser driven accelerators, and have potential application to enable effective detection in explorations of quantum chromodynamics.
