Experimental study of THGEM detector with mini-rim
  The gas gain and energy resolution of single and double THGEM detectors (5{\times}5cm2 effective area) with mini-rims (rim is less than 10{\mu}m) were studied. The maximum gain can reach 5{\times}103 and 2{\times}105 for single and double THGEM respectively, while the energy resolution of 5.9 keV X-ray varied from 18% to 28% for both single and double THGEM detectors of different hole sizes and thicknesses.All the experiments were investigated in mixture of noble gases(argon,neon) and small content of other gases(iso-butane,methane) at atmospheric pressure. 
Ai-Wu Zhang, Bo-Xiang Yu, Yu-Guang Xie, Hong-Bang Liu, Zheng-Hua An,   Zhi-Gang Wang, Xiao Cai, Xi-Lei Sun, Feng Shi, Jian F...
physics.ins-det hep-ex