利用量子辐射压缩产生准单能质子束
Generation of quasi-monoenergetic proton beams via quantum radiative compression
摘要：
高能量单能质子束的稠密性是其广泛应用的关键，现代激光等离子体离子加速方法的目标是获得能量分布尽可能小的高能质子束。在这项工作中，我们提出了一种量子辐射压缩的方法来后压缩高加速质子束，并将其转换成一个密集的准单能。我们发现，当辐射压加速产生的相对论等离子体与超强激光束正面碰撞时，由于量子辐射反应和有质动力的作用，等离子体会激发出大振幅的振荡，导致处于加速相的质子相空间以负梯度压缩.我们的三维自旋分辨QED粒子模拟结果表明，峰值能量为$\sim$ GeV，相对能量扩展为几个量子点，粒子数为$N_p\sim10^{10}$的空心结构质子束（或具有$1\%$能量扩展的$N_p\sim 10^9$）的材料，其可以满足重要应用的要求，例如，用于超厚致密材料的射线照相术，或作为强子对撞机的注入器。
英文摘要：
Dense high-energy monoenergetic proton beams are vital for wide applications, thus modern laser-plasma-based ion acceleration methods are aiming to obtain high-energy proton beams with energy spread as low as possible. In this work, we put forward a quantum radiative compression method to post-compress a highly accelerated proton beam and convert it to a dense quasi-monoenergetic one. We find that when the relativistic plasma produced by radiation pressure acceleration collides head-on with an ultraintense laser beam, large-amplitude plasma oscillations are excited due to quantum radiation-reaction and the ponderomotive force, which induce compression of the phase space of protons located in its acceleration phase with negative gradient. Our three-dimensional spin-resolved QED particle-in-cell simulations show that hollow-structure proton beams with a peak energy $\sim$ GeV, relative energy spread of few percents and number $N_p\sim10^{10}$ (or $N_p\sim 10^9$ with a $1\%$ energy spread) can be produced in near future laser facilities, which may fulfill the requirements of important applications, such as, for radiography of ultra-thick dense materials, or as injectors of hadron colliders.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
