基于闪烁体堆栈的大动态范围一维空间分辨质子能谱仪  

Large Dynamic Range One-Dimensional Spatial Resolution Proton Spectrometer Based on Scintillator Stack

作　　者：宋谭 高营 王迪 张予嘉 陈式有 赵家瑞 杨业 王茂成 闫逸花 王忠明 马文君 SONG Tan;GAO Ying;WANG Di;ZHANG Yujia;CHEN Shiyou;ZHAO Jiarui;YANG Ye;WANG Maocheng;YAN Yihua;WANG Zhongming;MA Wenjun(State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China;National Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Xi’an 710024,China)

机构地区：[1]北京大学核物理与核技术国家重点实验室,北京100871 [2]强脉冲辐射环境模拟与效应全国重点实验室,西安710024

出　　处：《现代应用物理》2024年第4期25-33,共9页Modern Applied Physics

基　　金：国家自然科学基金资助项目(10675074,61631001,11775010,11921006);国家重点研发计划资助项目(2019YFF01014402)。

摘　　要：随着超强超短激光技术的发展,激光驱动的质子束在多个领域展现出巨大的应用潜力。然而,由于其高瞬态流强、大散角、宽能谱的特点,这种质子束流的精确与高效诊断仍面临挑战。本文展示了一种具有高动态范围和一定空间分辨的闪烁体堆栈谱仪。该谱仪主要由闪烁体堆栈组件和成像系统组成,能够在线诊断激光加速质子束的能谱及横向轮廓。结合光学滤片的使用,能够实现大动态范围的探测。经模拟计算和实验验证,该谱仪能量量程约为5~87 MeV,能量分辨率在82 MeV时为1%。加入光学滤片后,粒子数测量的动态范围可达5个量级。With the development of ultra-intense and ultra-short laser technologies,laser-driven proton beams have demonstrated enormous potential applications across various fields.However,due to its characteristics of high transient current,large divergence,and broad energy spectrum,the precise and efficient diagnosis of these proton beams remains a challenge.In this paper,a scintillator stack spectrometer with a high dynamic range and certain spatial resolution is demonstrated.The spectrometer is primarily composed of scintillator stacks and an imaging system,enabling the online diagnosis of the energy spectrum and transverse profiles of laser-accelerated proton beams.Combined with the use of optical filters,large dynamic range detection can be achieved.Through simulation calculations and experimental validation,the spectrometer's energy range is approximately 5 to 87 MeV,and the energy resolution is 1%at 82 MeV.The addition of optical filters allows for a dynamic range of particle number measurements up to five orders of magnitude.

关 键 词：激光等离体加速器 质子能谱仪 闪烁体 

分 类 号：TL81[核科学技术—核技术及应用] O571[理学—粒子物理与原子核物理]