Experimental study of a THGEM detector with mini-rims

The gas gain and energy resolution of single and double THGEM detectors (5cm × 5cm effective area) with mini-rims (rim less than 10 μm) were studied. The maximum gain was found to reach 5×103 and 2 × 105 for single and double THGEMs respectively, while the energy resolution for 5.9 keV X-rays varied...