Experimental studies of THGEM in different Ar/CO_2 mixtures  

作　　者：何占营 周健荣 孙志嘉 杨桂安 许虹 王艳凤 刘倩 刘宏邦 陈石 谢一冈 郑阳恒 王晓冬 张小东 胡碧涛 陈元柏 

机构地区：[1]School of Nuclear Science and Technology,Lanzhou University [2]Institute of High Energy Physics Chinese Academy of Sciences [3]State Key Laboratory of Particle Detection and Electronics [4]University of Chinese Academy of Sciences [5]State Key Laboratory of Particle Detection and ElectronIcs

出　　处：《Chinese Physics C》2014年第5期58-61,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11127508,11175199);NPL,CAEP(Project 2013DB06)

摘　　要：In this paper, the performance of a type of domestic THGEM （THick Gaseous Electron Multiplier） working in Ar/CO2 mixtures is reported in detail. This kind of single THGEM can provide a gain range from 100 to 1000, which is very suitable for application in neutron detection. In order to study its basic characteristics as a reference for the development of a THGEM based neutron detector, the counting rate plateau, the energy resolution and the gain of the THGEM have been measured in different Ar/CO2 mixtures with a variety of electrical fields. For the Ar/CO2（90%/10%） gas mixture, a wide counting rate plateau is achieved from 720 V to 770 V, with a plateau slope of 2.4%/100 V, and an excellent energy resolution of about 22% is obtained at the 5.9 keV full energy peak of the 55Fe X-ray source.In this paper, the performance of a type of domestic THGEM （THick Gaseous Electron Multiplier） working in Ar/CO2 mixtures is reported in detail. This kind of single THGEM can provide a gain range from 100 to 1000, which is very suitable for application in neutron detection. In order to study its basic characteristics as a reference for the development of a THGEM based neutron detector, the counting rate plateau, the energy resolution and the gain of the THGEM have been measured in different Ar/CO2 mixtures with a variety of electrical fields. For the Ar/CO2（90%/10%） gas mixture, a wide counting rate plateau is achieved from 720 V to 770 V, with a plateau slope of 2.4%/100 V, and an excellent energy resolution of about 22% is obtained at the 5.9 keV full energy peak of the 55Fe X-ray source.

关 键 词：THGEM counting rate plateau gas gain energy resolution 

分 类 号：O571.53[理学—粒子物理与原子核物理]