Design of the LHAASO detectors

作     者：Huihai He For the LHAASO Collaboration 

作者机构：Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of SciencesBeijing 100049China 不详 

出 版 物：《Radiation Detection Technology and Methods》 (辐射探测技术与方法（英文）)

年 卷 期：2018年第2卷第1期

页      面：49-56页

学科分类：07[理学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work is supported in China by NSFC(Nos.11205165,11375210,11375224,11405181,11475190 and 11635011) the Chinese Academy of Sciences,Institute of High Energy Physics,the Key Laboratory of Particle Astrophysics,CAS 

主　　题：Origin of cosmic rays Gamma ray astronomy Extensive air shower 

摘      要：Introduction The Large High Altitude Air Shower Observatory plans to build a hybrid extensive air shower array with an area of about 1 km^(2) at an altitude of 4,410 m *** Sichuan province,China,to explore the origin of high-energy cosmic ***2A LHAASO-KM2A will detect gamma ray sources with a sensitivity of about 1%Crab Unit at 100 *** covers an area of 1 km^(2) with a total of 5195 scintillation *** angular resolution reaches about 0.3 degrees,and the energy resolution is better than 25%.With the help of 1171 muon detectors,cosmic nuclei background will be rejected to a level of 10-4 at 50 *** design and performances of the scintillation detectors and muon detectors are described in *** LHAASO-WCDA focuses on surveying the northern sky for steady and transient sources from 100 GeV to 20 TeV,with a very high background rejection power and a good angular *** WCDA consists of three water ponds with a total area of 78,000 m^(2),and the effective water depth is 4 *** water pond is divided into 5m×5m cells partitioned by black plastic curtains to prevent penetration of the light from neighboring *** 8-inch PMT sits at the bottom center of each cell,looking upward to collect Cherenkov light generated by shower secondary particles in *** LHAASO-WFCTA is composed of 12 wide-field-of-view Cherenkov/fluorescence *** telescope consists of a spherical light collector of about 4.7 m^(2) and focal plane camera of 32×32 pixels with a pixel size of 0.5 *** prototype arrays A prototype array about 1%of LHAASO has been constructed at Yangbajing Cosmic Ray Observatory and has been in operation for more than 2 *** performance fully meets the design *** The LHAASO detectors are designed to fulfill the physical goals in gamma ray astronomy and cosmic ray ***-fourth of LHAASO will be constructed and put into operation to produce physical data by the end of *** whole ar