激光等离子体波电子加速器

LASER PLASMA WAVE ELECTRON ACCELERATORS

本文分别用理论分析和粒子模拟方法讨论了等离子体尾波加速器和拍波加速器的物理机制。结果表明,只要激光等离子体波足够强,加上适当强度的横向磁场,就可以把MeV数量级的电子在公尺距离内加速到GeV数量级的能量。另外,还用粒子模拟方法,研究了激光对热等离子体受激向后喇曼散射产生低相速度的等离子体静电波对低能电子加速的问题,探讨了多级或多波加速的可能性。结果表明,利用激光等离子体波加速器,在一般的实验室条件下,就可获得GeV数量级的高能电子。

In this paper, we discuss the physical mechanism of laser plasma wake wave and beat wave accelerators by means of theoretical analysis and particle simulation methods. The results show that: as long as laser plasma wave has VpΛ≈c and is strong enough, and with a proper transverse magnetic field applied, we may accelerate relativistic electrons to the order of magnitude of GeV within a distance of meters. We have also studied the problem of ES wave with low phase velocity generated by laser plasma Raman scattering to accelerate non-relativistic electrons by using particle simulation methods, and possibility of multistage, or multiwave, acceleration is explored as well. The results show that: taking the advantage of laser plasma wave accelerator, we will be able to get high energy electrons of the order of magnitude of Gev under ordinary laboratory conditions.