论文标题
在一个阶段创建和直接激光加速度
Creation and direct laser acceleration of positrons in a single stage
论文作者
论文摘要
非线性强场QED，等离子体物理学和实验室天体物理学的基础研究需要相对论正电子束。正电子因其寿命短而难以创建和操纵，并且它们的能量收益受到传统设施中的加速器大小的限制。等离子体中的替代紧凑型加速器概念在电子中越来越成熟，但是正电子的产生和加速度仍然是一个杰出的挑战。在这里，我们提出了一个新的设置，在等离子体通道中强烈的激光传播期间，我们可以在一个阶段生成，注入和加速它们。正电子是由90度的激光电子碰撞产生的，在该碰撞中，通过800 NC电子束负载使注入和引导成为可能，从而逆转了背景静电场的符号。我们获得了20 fc正电子束，具有GEV级中央能量在0.5 mm的等离子体内。
Relativistic positron beams are required for fundamental research in nonlinear strong field QED, plasma physics, and laboratory astrophysics. Positrons are difficult to create and manipulate due to their short lifetime, and their energy gain is limited by the accelerator size in conventional facilities. Alternative compact accelerator concepts in plasmas are becoming more and more mature for electrons, but positron generation and acceleration remain an outstanding challenge. Here we propose a new setup where we can generate, inject and accelerate them in a single stage during the propagation of an intense laser in a plasma channel. The positrons are created from a laser-electron collision at 90 degrees, where the injection and guiding are made possible by an 800 nC electron beam loading which reverses the sign of the background electrostatic field. We obtain a 20 fC positron beam, with GeV-level central energy within 0.5 mm of plasma.
