论文标题
激光脉冲和电子束等离子体韦克菲尔德加速器
Laser-Pulse and Electron-Bunch Plasma Wakefield Accelerator
论文作者
论文摘要
激光脉冲的传播距离和通过等离子体的高电荷电子束分别受衍射和自我定位的限制。这对两个主要高级加速器概念的性能施加了严重的限制：激光和血浆Wakefield加速器。使用数值模拟，我们证明，当两个光束在等离子体中互助时，它们可以协同相互作用并扩展彼此的行进距离。发现负责协同作用的关键相互作用是通过电子束引导的激光通道，并且通过激光脉冲直接对束电子的激光加速。值得注意的是，尽管具有较小的能量含量，但通过引导电子束将从激光脉冲传递到等离子体的能量量可以增加几倍。讨论了这种协同相互作用对外部注射证人指控高梯度加速度的影响，并制定了激光脉冲和电子束等离子体加速器（LEPA）的新概念。
Propagation distances of intense laser pulses and high-charge electron beams through the plasma are, respectively, limited by diffraction and self-deceleration. This imposes severe constraints on the performance of the two major advanced accelerator concepts: laser and plasma wakefield accelerators. Using numerical simulations, we demonstrate that when the two beams co-propagate in the plasma, they can interact synergistically and extend each other's travel distances. The key interactions responsible for the synergy are found to be laser channeling by the electron bunch, and direct laser acceleration of the bunch electrons by the laser pulse. Remarkably, the amount of energy transferred from the laser pulse to the plasma can be increased by several times by the guiding electron bunch despite its small energy content. Implications of such synergistic interactions for the high-gradient acceleration of externally injected witness charges are discussed, and a new concept of a Laser-pulse and Electron-bunch Plasma Accelerator (LEPA) is formulated.
