On intense proton beam generation and transport in hollow cones
On intense proton beam generation and transport in hollow cones
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DOI：
10.1016/j.mre.2016.11.001
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发表时间：
2017-01-01
影响因子：
5.1
通讯作者：
Murakami, M.
中科院分区：
文献类型：
--
作者：
Honrubia, J. J.;Morace, A.;Murakami, M.
用二维粒子模拟方法研究了质子的产生、输运以及与空心锥靶的相互作用。一个按比例缩小的空心锥与黄金壁，碳尖和弯曲的氢锥内的箔已被认为是。质子加速由10（20）W.cm（-2）和聚焦在氢箔上的1 ps激光脉冲驱动。模拟结果表明，一个重要的表面电流在锥壁产生的磁场。当快速质子和共同运动的电子向锥尖传播时，该磁场被准中性等离子体拖曳。结果，在锥尖处建立了数十kT的B（z）场，其足够强以偏转质子并显著增加束发散度。我们建议在锥尖处使用重材料并增加激光强度以减轻磁场产生和质子束发散。版权所有（C）2016中国工程物理研究院科技信息中心由爱思唯尔公司制作和主持
Proton generation, transport and interaction with hollow cone targets are investigated by means of two-dimensional PIC simulations. A scaled-down hollow cone with gold walls, a carbon tip and a curved hydrogen foil inside the cone has been considered. Proton acceleration is driven by a 10(20) W.cm(-2) and 1 ps laser pulse focused on the hydrogen foil. Simulations show an important surface current at the cone walls which generates a magnetic field. This magnetic field is dragged by the quasi-neutral plasma formed by fast protons and co-moving electrons when they propagate towards the cone tip. As a result, a tens of kT B(z )field is set up at the cone tip, which is strong enough to deflect the protons and increase the beam divergence substantially. We propose using heavy materials at the cone tip and increasing the laser intensity in order to mitigate magnetic field generation and proton beam divergence. Copyright (C) 2016 Science and Technology Information Center, China Academy of Engineering Physics. Production and hosting by Elsevier B.V.