experimental study on the performance of a thgem detector for x-rays

By expanding the applications of gem detectors, a newer pattern of such detectors was introduced in 2004, named thgem detectors. in this work, a sample of an x-ray detector was designed and constructed using 2 cm × 2 cm thgems domestically produced with a thickness of 250 µm, a hole diameter of 300 µm and a pitch of 500 µm, for the first time. the triple thgem detector working in ar/co2 gas mixture was characterized. influence of gas pressure and gas mixture on gain of the detector was investigated. results show the detector operated in a stable mode with no discharges. the gain of the detector increased with high voltage across the thgem electrodes exponentially. this verified the performance of a detector as a proportional counter. also, the detector’s gain is maximum at ar/co2 (80/20) gas mixture and voltage of 700 v applied to each multiplier. the detector is promising for localization applications such as particle physics experiments.