Leveraging extreme laser-driven magnetic fields for gamma-ray generation and pair production
Leveraging extreme laser-driven magnetic fields for gamma-ray generation and pair production
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DOI：
10.1088/1361-6587/aab222
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发表时间：
2018-05-01
影响因子：
2.2
通讯作者：
Arefiev, A. V.
中科院分区：
文献类型：
--
作者：
Jansen, O.;Wang, T.;Arefiev, A. V.
强激光脉冲通过相对论透明现象在经典过临界等离子体中传播的能力被证明有利于产生强等离子体磁场。粒子在细胞模拟表明，这些领域显着提高了激光照射的电子的辐射率，此外，他们准直的发射，使定向和密集的多MeV的伽马射线束是可以实现的。这种能力可以利用电子-正电子对生产经由线性Breit-Wheeler过程通过碰撞两个这样的密集束。模拟结果表明，在这样的设置中可以产生超过103对正电子，并且正电子的方向性可以通过光束之间的入射角来控制。
The ability of an intense laser pulse to propagate in a classically over-critical plasma through the phenomenon of relativistic transparency is shown to facilitate the generation of strong plasma magnetic fields. Particle-in-cell simulations demonstrate that these fields significantly enhance the radiation rates of the laser-irradiated electrons, and furthermore they collimate the emission so that a directed and dense beam of multi-MeV gamma-rays is achievable. This capability can be exploited for electron-positron pair production via the linear Breit-Wheeler process by colliding two such dense beams. Presented simulations show that more than 103 pairs can be produced in such a setup, and the directionality of the positrons can be controlled by the angle of incidence between the beams.