摘要
中国锦屏地下实验室是目前世界上岩石覆盖最深的深地实验室,对宇宙线μ子具有良好的屏蔽作用,具有极低的宇宙线通量,因此适用于开展对稀有物理事例的探测实验。目前,包括中国暗物质实验(China Dark matter EXperiment,CDEX)、粒子和天体物理氙实验(Particle and Astrophysical Xenon Experiments,PandaX)、锦屏深地核天体物理实验装置(Jinping Underground Nuclear Astrophysics Experiment,JUNA)等实验组已经入驻锦屏实验室,对暗物质直接探测、无中微子双β衰变、天体核反应等一系列稀有物理事例进行实验探测,并给出了一系列国际先进水平的研究成果。本文总结了中国锦屏地下实验室自成立以来的发展过程和本底控制情况,并对实验室中各个实验组所开展实验的物理意义、实验原理、关键技术、物理成果等进行介绍,同时给出实验组接下来的实验计划。
China Jinping Underground Laboratory(CJPL)has the deepest rock overburden in the world,which considerably shields the detectors from muons.Thus,it has ultra-low radiation background level and is useful for experiments investigating rare physical events.Previously,experiments including the CDEX(China Dark matter EXperiment),PandaX(Particle and Astrophysical Xenon Experiments),JUNA(Jinping Underground Nuclear Astrophysics Experiment),and neutrino experiment have been carried out at CJPL and have given good results in dark matter detection,neutrinoless double beta decay,and more.This review introduces the construction process of CJPL,and introduces the facilities,results,and future plans of the aforementioned experiments.The CDEX used a high-purity germanium detector array for the dark matter detection and neutrinoless double-beta decay searches;whereas,for the same searches,PandaX used a dual-phase liquid xenon time projection chamber detector.A proton and helium accelerator was used by JUNA to simulate four nuclear reactions that occur in the Universe.A 103-kg prototype was constructed for feasibility verification by the neutrino experiment.The CDEX,PandaX,and JUNA collaboration groups give their latest results,all of which have approached or replaced the best results in the world.These experiments verify the extraordinary experimental conditions at CJPL.With the construction of CJPL-II,we expect an increase in the number of experiments based in Jinping and for further significant results to be achieved.
作者
王钰锋
刘家璇
杨丽桃
曾志
马豪
岳骞
WANG Yufeng;LIU Jiaxuan;YANG Litao;ZENG Zhi;MA Hao;YUE Qian(Department of Engineering Physics,Tsinghua University,Beijing 100084,China)
出处
《核技术》
CAS
CSCD
北大核心
2023年第8期166-174,共9页
Nuclear Techniques
基金
国家重点研发计划项目(No.2017YFA0402200)资助。
