Generating Overcritical Dense Relativistic Electron Beams via Self-Matching Resonance Acceleration
Generating Overcritical Dense Relativistic Electron Beams via Self-Matching Resonance Acceleration
复制标题
通过自匹配谐振加速产生超临界致密相对论电子束
DOI：
10.1103/physrevlett.110.045002
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发表时间：
2013-01-22
影响因子：
8.6
通讯作者：
He, X. T.
中科院分区：
文献类型：
--
作者：
Liu, B.;Wang, H. Y.;He, X. T.
我们提出了一种新的自匹配共振加速机制，用于在近临界密度等离子体中利用超强圆偏振激光脉冲产生稠密的相对论电子束。当自生准静态轴向磁场足够强时，在激光通道中心形成过密的电子聚束。在捕获过程中，电子感应加速器的频率和相位可以自动调节，以匹配谐振条件。匹配后的电子被连续加速，从而产生了具有超临界密度、螺旋结构和平台轮廓能谱的准直电子束。DOI：10.1103/PhysRevLett.110.045002
We show a novel self-matching resonance acceleration regime for generating dense relativistic electron beams by using ultraintense circularly polarized laser pulses in near-critical density plasmas. When the self-generated quasistatic axial magnetic field is strong enough to pinch and trap thermal relativistic electrons, an overdense electron bunch is formed in the center of the laser channel. In the trapping process, the electron betatron frequencies and phases can be adjusted automatically to match the resonance condition. The matched electrons are accelerated continuously and a collimated electron beam with overcritical density, helical structure, and plateau profile energy spectrum is hence generated. DOI: 10.1103/PhysRevLett.110.045002