Geometry and optics calibration of WFCTA prototype telescopes using star light  

作　　者：马玲玲 白云翔 曹臻 陈明君 陈丽红 陈松站 陈垚 丁凯奇 何会海 刘佳 刘佳丽 李晓晓 马欣华 盛祥东 肖刚 查敏 张寿山 张勇 赵静 周斌 

机构地区：[1]Institute of High Energy Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics C》2011年第5期478-482,共5页中国物理C（英文版）

基　　金：Supported by 100 Talents Programme of Chinese Academy of Sciences;Knowledge Innovation Program of Chinese Academyof Sciences (H85451D0U2);National Natural Science Foundation of China (10975145)

摘　　要：The Large High Altitude Air Shower Observatory （LHAASO） project is proposed to study high energy gamma ray astronomy （40 GeV–1 PeV） and cosmic ray physics （20 TeV–1 EeV）. The wide field of view Cherenkov telescope array, as a component of the LHAASO project, will be used to study the energy spectrum and composition of cosmic rays by measuring the total Cherenkov light generated by air showers and the shower maximum depth. Two prototype telescopes have been in operation since 2008. The pointing accuracy of each telescope is crucial for the direction reconstruction of the primary particles. On the other hand, the primary energy reconstruction relies on the shape of the Cherenkov image on the camera and the unrecorded photons due to the imperfect connections between the photomultiplier tubes. UV bright stars are used as point-like objects to calibrate the pointing and to study the optical properties of the camera, the spot size and the fractions of unrecorded photons in the insensitive areas of the camera.The Large High Altitude Air Shower Observatory （LHAASO） project is proposed to study high energy gamma ray astronomy （40 GeV–1 PeV） and cosmic ray physics （20 TeV–1 EeV）. The wide field of view Cherenkov telescope array, as a component of the LHAASO project, will be used to study the energy spectrum and composition of cosmic rays by measuring the total Cherenkov light generated by air showers and the shower maximum depth. Two prototype telescopes have been in operation since 2008. The pointing accuracy of each telescope is crucial for the direction reconstruction of the primary particles. On the other hand, the primary energy reconstruction relies on the shape of the Cherenkov image on the camera and the unrecorded photons due to the imperfect connections between the photomultiplier tubes. UV bright stars are used as point-like objects to calibrate the pointing and to study the optical properties of the camera, the spot size and the fractions of unrecorded photons in the insensitive areas of the camera.

关 键 词：cosmic ray Cherenkov telescope CALIBRATION 

分 类 号：TH751[机械工程—仪器科学与技术]