用于锦屏深地核天体物理研究的强流加速装置的设计与试验进展  

Design and Recent Progress of High Intensity Accelerator for Jinping Underground Nuclear Astrophysics Experiment(JUNA)

作　　者：陈立华[1] 崔保群[1] 马鹰俊[1] 马瑞刚[1] 唐兵[1] 黄青华[1] 马燮[1] 连钢[1] 郭冰[1] 柳卫平[1] 孙良亭[2] 武启[2] CHEN Lihua;CUI Baoqun;MA Yingjun;MA Ruigang;TANG Bing;HUANG Qinghua;MA Xie;LIAN Gang;GUO Bing;LIU Weiping;SUN Liangting;WU Qi(China Institute of Atomic Energy,Beijing 102413,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]中国原子能科学研究院,北京102413 [2]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《原子能科学技术》2020年第11期2231-2237,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(11490560);中国核工业集团集中研发项目资助(FA18000201);中国科学院仪器设备功能开发技术创新项目资助(28Y531040)。

摘　　要：对揭示元素形成及天体起源具有重要作用的关键低能核反应由于反应截面较小,同时受宇生高能射线影响,在地面环境难以进行直接测量。在极低本底的深地环境中,利用强流离子加速器打靶,进一步提高关心核反应的发生率,就可在地球开展接近伽莫夫能区低能核反应截面直接测量。锦屏深地实验室(CJPL)具有优越的地理环境,可有效屏蔽宇生高能射线。依托CJPL的有利条件,中国原子能科学研究院正在开展核天体物理关注能区核反应直接测量的研究。作为开展实验研究的必要条件,一台低能强流加速装置也在建设当中。该加速装置可产生低能强流的质子束和氦束,最高加速电压400 kV,设计最大束流强度10 mA。本文介绍了用于锦屏深地核天体物理实验(JUNA)的强流加速装置的基本情况,包括加速装置的物理要求、布局及主要设计考虑、束流光学及地面试验进展等。Direct measurement of the cross sections for the key nuclear reactions is crucial for obtaining benchmark data for stellar model,verifying extrapolation model,constraining theoretical calculations,and solving key scientific questions in nuclear astrophysics.However,cross sections of the astrophysical reactions are extremely small.Tiny reaction rates in laboratories at the earth surface are hampered by the cosmic-ray background.With the ultra-low background,underground lab becomes a promising solution of experimental nuclear astrophysics.China Jinping Underground Laboratory(CJPL)is currently deepest underground site in the world.For such experiments,a 400 kV and 10 mA accelerator specially designed for Jinping Underground Nuclear Astrophysics Experiment(JUNA)will be placed in CJPL.In this paper,JUNA high intensity accelerator was introduced.Its layout,design considerations,beam optics and recent progress in ground laboratory were presented.

关 键 词：深地实验室 强流加速装置 直接测量 

分 类 号：TL51[核科学技术—核技术及应用]