强激光驱动的运动电场加速质子的研究

发布时间：2018-02-09 19:16

  本文关键词： 激光技术 质子加速 辐射压加速 粒子模拟方法 高能量质子束　出处：《激光技术》2017年02期 　论文类型：期刊论文

【摘要】：为了研究激光辐射压驱动的运动电场中加速质子的相关问题,对强激光与等离子体相互作用过程进行了理论分析,并采用2维粒子模拟方法,对理论分析结果进行了数值模拟验证。结果表明,当超短超强激光脉冲与处在背景等离子体前方的薄固体平靶相互作用时,在固体靶后部形成一个由电子层-离子层组成的双层结构,在激光辐射压的不断推进下,双层结构在背景等离子体里以一定速度传播形成一个运动电场;在背景等离子体中的质子被这个运动电场捕获并能加速到很高的能量,质子的最大能量达到20GeV。理论分析结果与2维粒子模拟结果符合得很好。
[Abstract]:In order to study the related problems of accelerating proton in the moving electric field driven by laser radiation pressure, the interaction between intense laser and plasma is theoretically analyzed, and the two-dimensional particle simulation method is used. The theoretical results are verified by numerical simulation. The results show that when ultrashort ultra-strong laser pulses interact with thin solid flat targets in front of the background plasma, A double-layer structure composed of electron layer and ion layer is formed at the back of the solid target, and a moving electric field is formed by the double-layer structure propagating at a certain speed in the background plasma under the continuous promotion of the laser radiation pressure. The protons in the background plasma are trapped by the moving electric field and can be accelerated to a very high energy. The maximum energy of the protons is up to 20 GeV. The theoretical results are in good agreement with the two-dimensional particle simulation results.
【作者单位】： 新疆大学物理科学与技术学院;
【基金】：国家自然科学基金资助项目(11547121,11575150) 新疆大学博士启动基金资助项目(BS150216,BS150217)
【分类号】：O53;TN249
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本文编号：1498663