高海拔宇宙线观测站LHAASO概况  

Introduction to Large High Altitude Air Shower Observatory (LHAASO)

作　　者：曹臻[1,2] 陈明君 陈松战[1] 胡红波[1,2] 刘成[1] 刘烨 马玲玲[1] 马欣华 盛祥东[1] 吴含荣[1] 肖刚[1] 姚志国[1] 尹丽巧[1] 查敏[1] 张寿山(代表LHAASO合作组) CAO Zhen;CHEN Ming-jun;CHEN Song-zhan;HU Hong-bo;LIU Cheng;LIU Ye;MA Ling-ling;MA Xin-hua;SHENG Xiang-dong;WU Han-rong;XIAO Gang;YAO Zhi-guo;YIN Li-qiao;ZHA Min;ZHANG Shou-shan(Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049;University of Chinese Academy of Sciences,Beijing 100049;School of Management Science and Engineering,Hebei University of Economics and Business,Shijiazhuang 050061)

机构地区：[1]中国科学院高能物理研究所粒子天体物理重点实验室,北京100049 [2]中国科学院大学,北京100049 [3]河北经贸大学管理科学与工程学院,石家庄050061

出　　处：《天文学报》2019年第3期1-16,共16页Acta Astronomica Sinica

基　　金：中国科学院国际合作局对外合作重点项目(113111KYSB20170055);国家自然科学基金项目(11675187、11575203、U1731136、11505190、11635011)资助

摘　　要：宇宙线发现百年以来,宇宙线起源仍然是一个谜.研究宇宙线起源主要在甚高能(VHE)伽马射线天文学和宇宙线物理学两个领域交叉展开.新一代高海拔宇宙线观测站(LHAASO)拥有高海拔、全天候和大规模优势,利用多种探测手段对宇宙线开展联合观测,大幅提升对伽马射线和宇宙线的鉴别能力.LHAASO将开展全天区伽马源扫描搜索以大量发现新伽马源,将获得30TeV以上伽马射线探测的最高灵敏度,将在宽达5个数量级的能量范围内精确测量宇宙线分成份能谱,为揭开宇宙线起源谜团给出重要判据.系统介绍了LHAASO的探测器结构、性能优势和科学目标.From the century discovery of cosmic ray, the origin of cosmic ray is still a mystery. Study on the origin of high energy cosmic ray is in a cross field between the very high energy (VHE) gamma ray astronomy and cosmic ray physics. The Large High Altitude Air Shower Observatory (LHAASO) is a unique and new generation experiment with the advantages with an high altitude and a large effective area. It takes function of hybrid technology to detect cosmic ray, improving the separating power between gamma ray and cosmic rays. LHAASO is expected to survey full sky to find new gamma ray sources, to obtain the highest sensitivity to > 30 TeV gamma ray detection, and to make very high precision measurement in cosmic rays spectrum in energy range of 5 orders. LHAASO will provide a decisive judgement for unraveling the mystery of the origin of cosmic ray. This paper describes the structure, performances, and scientific motivation of LHAASO.

关 键 词：宇宙线 甚高能伽马射线 广延大气簇射 高海拔宇宙线观测站 

分 类 号：P172[天文地球—天文学]