论文标题
$γ$ photon在韦克菲尔德捕获和加速自旋偏振正上音
Trapping and acceleration of spin-polarized positrons from $γ$ photon splitting in wakefields
论文作者
论文摘要
对于前列研究，例如$ e^ - e^+$碰撞器物理学，充满活力的自旋偏振正值是极为需要的，但是制作紧凑的正电子来源仍然非常具有挑战性。在这里，我们提出了一个有效的陷阱和加速度的偏振正值方案。与双重激光碰撞的种子电子会产生偏振$γ$光子，然后通过非线性Breit-wheeler工艺分成$ E^ - e^+$对，平均（部分）正电子极化高于30 \％（70 \％）。超过70 \％的正上音被捕获并加速在由空心电子束驱动的回收韦克菲尔德中，并获得3.5 GEV/cm的能量增益，并轻微地去极化。该计划为未来应用构建紧凑而经济的正电子来源提供了潜力。
Energetic spin-polarized positrons are extremely demanded for forefront researches, such as $e^- e^+$ collider physics, but making compact positron sources is still very challenging. Here we put forward an efficient scheme of trapping and acceleration of polarized positrons in plasma wakefields. Seed electrons colliding with a bichromatic laser create polarized $γ$ photons which then split into $e^- e^+$ pairs via nonlinear Breit-Wheeler process with an average (partial) positron polarization above 30\% (70\%). Over 70\% positrons are trapped and accelerated in recovered wakefields driven by a hollow electron beam, obtaining an energy gain of 3.5 GeV/cm with slight depolarization. This scheme provides a potential for constructing compact and economical positron sources for future applications.
