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LHAASO-WCDA is a large ground-based water Cherenkov detector array planned to be built at Shangri-La, Yunnan Province, China. As a major component of the LHAASO project, the main purpose of LHAASO-WCDA is to survey the northern sky for very-high-energy (above 100 GeV) gamma ray sources and measure the spectrum. To gain full knowledge of the water Cherenkov technique and to investigate the engineering issues, a 9-cell detector array has been built at the Yang-Ba-Jing site, neighboring the ARGO-YBJ experiment. With the array, charge calibration methods for both low and high ranges of the PMT readout are studied, whose result shows that a precision at several percentages can be reached, which can satisfy the requirement of the detector array. During the long term operation, the charge calibration stability and environmental affection are studied; in this paper, the results are discussed. These calibration methods are proposed to be applied in the future LHAASO-WCDA project.  相似文献   
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LHAASO-WCDA is a large ground-based water Cherenkov detector array planned to be built at ShangriLa, Yunnan Province, China. As a major component of the LHAASO project, the main purpose of LHAASO-WCDA is to survey the northern sky for very-high-energy(above 100 GeV) gamma ray sources and measure the spectrum. To gain full knowledge of the water Cherenkov technique and to investigate the engineering issues, a 9-cell detector array has been built at the Yang-Ba-Jing site, neighboring the ARGO-YBJ experiment. With the array, charge calibration methods for both low and high ranges of the PMT readout are studied, whose result shows that a precision at several percentages can be reached, which can satisfy the requirement of the detector array. During the long term operation, the charge calibration stability and environmental afection are studied; in this paper, the results are discussed. These calibration methods are proposed to be applied in the future LHAASO-WCDA project.  相似文献   
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中国散裂中子源反角白光中子束流参数的初步测量   总被引:2,自引:0,他引:2       下载免费PDF全文
鲍杰  陈永浩  张显鹏  栾广源  任杰  王琦  阮锡超  张凯  安琪  白怀勇  曹平  陈琪萍  程品晶  崔增琪  樊瑞睿  封常青  顾旻皓  郭凤琴  韩长材  韩子杰  贺国珠  何泳成  何越峰  黄翰雄  黄蔚玲  黄锡汝  季筱路  吉旭阳  江浩雨  蒋伟  敬罕涛  康玲  康明涛  兰长林  李波  李论  李强  李晓  李阳  李样  刘荣  刘树彬  刘星言  马应林  宁常军  聂阳波  齐斌斌  宋朝晖  孙虹  孙晓阳  孙志嘉  谭志新  唐洪庆  唐靖宇  王鹏程  王涛峰  王艳凤  王朝辉  王征  文杰  温中伟  吴青彪  吴晓光  吴煊  解立坤  羊奕伟  杨毅  易晗  于莉  余滔  于永积  张国辉  张旌  张林浩  张利英  张清民  张奇伟  张玉亮  张志永  赵映潭  周良  周祖英  朱丹阳  朱科军  朱鹏 《物理学报》2019,68(8):80101-080101
中国散裂中子源(CSNS)已于2018年5月建设完工,随后进行了试运行.其中的反角白光中子束线(Back-n)可用于中子核数据测量、中子物理研究和核技术应用等多方面的实验.本文报道对该中子束的品质参数测量实验过程以及最终实验结果.实验主要采用中子飞行时间法,利用~(235)U,~(238)U裂变室和~6Li-Si探测器测量了中子能谱和中子注量率,又利用闪烁体-互补金属氧化物半导体探测系统测量了中子束斑的剖面,得到了该束线的初步实验测量结果.其中白光中子的全能谱测量范围eV—100 MeV,给出了不确定度分析;给出了中子注量率两个实验厅位置的满功率值;给出了白光中子在直径60 mm情况下的全能区束斑.通过与模拟结果的比较探讨了以上结果的合理性,并提出了改进计划.这些实验结果为以后该束线的核数据测量和探测器标定实验奠定了基础.  相似文献   
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A prototype array for the LHAASO-KM2A, which consists of 42 detector units and fully overlaps the ARGO-YBJ experiment, was set up at the Yangbajing cosmic ray observatory and has been in stable operation since Octoter 2010. The resulting performances of the KM2A electromagnetic particle detector prototypes fully meet the design requirements. Through hybrid observation of cosmic ray showers with the ARGO-YBJ experiment, the performances and long-term stability of the prototype array are tested and the results are consistent with expectation. The cosmic ray moon shadow observed by the prototype array is also presented.  相似文献   
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