Enhanced electron injection in laser-driven bubble acceleration by ultra-intense laser irradiating foil-gas targets
Enhanced electron injection in laser-driven bubble acceleration by ultra-intense laser irradiating foil-gas targets
复制标题
通过超强激光照射箔气体靶增强激光驱动气泡加速中的电子注入
DOI：
10.1063/1.4927583
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发表时间：
2015
影响因子：
2.2
通讯作者：
Kawata S.
中科院分区：
文献类型：
--
作者：
Zhang Guo-Bo;Ma Yan-Yun;Xu Han;Hafz Nasr A. M.;Yang Xiao-Hu;Chen Min;Yu Tong-Pu;Zou De-Bin;Liu Jian-Xun;Yan Jian-Feng;Zhuo Hong-Bin;Gan Long-Fei;Tian Li-Chao;Shao Fu-Qiu;Yin Yan;Kawata S.
提出了一种增强激光驱动空泡加速中电子注入电荷的方案。在该方案中，薄箔靶被放置在气体靶的前面。在与超强激光脉冲相互作用时，箔发射具有大纵向动量的电子，使它们被捕获到气态等离子体靶中的透射成形的激光激发气泡中。二维粒子模拟被用来演示这个方案，并且可以产生总电子数为4.21×108 μm−1的电子束，这是没有箔时产生的电子数的两倍。这种方案可以广泛用于需要高电子产额的应用，例如从相对论电子束与固体靶相互作用产生正电子和伽马射线。
A scheme for enhancing the electron injection charge in a laser-driven bubble acceleration is proposed. In this scheme, a thin foil target is placed in front of a gas target. Upon interaction with an ultra-intense laser pulse, the foil emits electrons with large longitudinal momenta, allowing them to be trapped into the transmitted shaped laser-excited bubble in the gaseous plasma target. Two-dimensional particle-in-cell simulation is used to demonstrate this scheme, and an electron beam with a total electron number of 4.21×108 μm−1 can be produced, which is twice the number of electrons produced without the foil. Such scheme may be widely used for applications that require high electron yields such as positron and gamma ray generation from relativistic electron beams interacting with solid targets.