Dielectric laser accelerators
Dielectric laser accelerators
复制标题
DOI：
10.1103/revmodphys.86.1337
复制
发表时间：
2014-12-23
影响因子：
44.1
通讯作者：
Yoder, Rodney B.
中科院分区：
文献类型：
--
作者：
England, R. Joel;Noble, Robert J.;Yoder, Rodney B.
利用红外激光来驱动光学尺度的光刻制造的粒子加速器是一个正在发展的研究领域，近年来引起了越来越多的兴趣。综述了介质激光加速(DLA)方法的物理和技术原理。在典型激光脉冲长度为0.1到1ps的DLA方案中，坚固介质材料的激光损伤通量对应于GV/m区域内的峰值表面电场。相应的加速场增强表示加速器的有效长度在1到2个数量级之间的潜在缩短。在同等平均功率水平下，基于DLA的加速器(激光器)的电源成本低于微波源(速调管)，这是因为更广泛的可获得性和私营部门的投资。由于激光到粒子的高耦合效率，所需的脉冲能量与桌面微焦耳级激光器一致。结合这些激光器可以提供的非常高的重复频率(MHz)，DLA方法似乎有望用于各种应用，包括未来的高能物理对撞机、紧凑型光源、便携式医疗扫描仪和放射治疗机。
The use of infrared lasers to power optical-scale lithographically fabricated particle accelerators is a developing area of research that has garnered increasing interest in recent years. The physics and technology of this approach is reviewed, which is referred to as dielectric laser acceleration (DLA). In the DLA scheme operating at typical laser pulse lengths of 0.1 to 1 ps, the laser damage fluences for robust dielectric materials correspond to peak surface electric fields in the GV/m regime. The corresponding accelerating field enhancement represents a potential reduction in active length of the accelerator between 1 and 2 orders of magnitude. Power sources for DLA-based accelerators (lasers) are less costly than microwave sources (klystrons) for equivalent average power levels due to wider availability and private sector investment. Because of the high laser-to-particle coupling efficiency, required pulse energies are consistent with tabletop microJoule class lasers. Combined with the very high (MHz) repetition rates these lasers can provide, the DLA approach appears promising for a variety of applications, including future high-energy physics colliders, compact light sources, and portable medical scanners and radiative therapy machines.