用于激光加速质子参数表征的带电粒子活化测谱技术

发布时间：2018-05-30 14:12

本文选题：带电粒子活化 + 激光质子加速　；参考：《物理学报》2017年20期

【摘要】：基于传统带电粒子活化分析技术,发展了一种用于激光加速质子参数表征的带电粒子活化测谱方法.激光加速质子轰击不同厚度铜薄膜组成的诊断滤片堆栈,使铜片活化,通过测量各铜片活度及活性区的大小,获得加速质子的空间积分能谱、角分布等参数.详细讨论了活化测谱的滤片堆栈诊断排布、符合测量及解谱方法,并对该方法的可靠性进行了自洽检验;在XG-III皮秒激光装置上开展了带电粒子活化测谱实验,利用该诊断方法,得到了加速质子的角分布、空间积分能谱等参数,实验获得的质子最高截止能量18 MeV,激光能量到质子(4 MeV)的转换效率为1.07%.
[Abstract]:Based on the traditional technique of charged particle activation analysis, a method of particle activation spectroscopy for laser accelerated proton parameter characterization was developed. Laser accelerated protons bombarded the diagnostic filter stack with different thickness of copper film to activate the copper sheet. By measuring the activity of each copper sheet and the size of the active region, the parameters such as the spatial integral energy spectrum and angular distribution of the accelerated proton were obtained. The arrangement of filter stack diagnostics of activated spectrum is discussed in detail, which accords with the method of measurement and despectrum, and the reliability of this method is tested by self-consistent test, and the experiment of charged particle activation spectrum is carried out on the XG-III picosecond laser device, and the diagnostic method is used. The angular distribution of accelerating proton and the integral energy spectrum of space are obtained. The maximum cut-off energy of proton is 18 MeV and the conversion efficiency of laser energy to proton is 1.07 MeV.
【作者单位】：中国工程物理研究院激光聚变研究中心等离子体物理重点实验室;上海交通大学聚变科学与应用协同创新中心;北京大学应用物理与技术中心;
【基金】：中国工程物理研究院科学技术发展基金(批准号:2013A0103003) 科技部重大科学仪器设备开发专项(批准号:2012YQ03014206)资助的课题~~
【分类号】：TN241

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