Long-term stability test of a triple GEM detector

Abstract

The main aim of the study is to perform the long-term stability test of gain of the single mask triple GEM detector. A simple method is used for this longterm stability test using a radioactive X-ray source with high activity. The test is continued till accumulation of charge per unit area > 12.0 mC/mm 2 . The details of the chamber fabrication, the test set-up, the method of measurement and the test results are presented in this paper.

R&D of gas filled detectors for high energy physics experiments

“…So the intrinsic gain variation will not affect the result.) In this study, we have arrived at a conclusion that no ageing is observed till the accumulation of charge per unit area > 12.0 mC/mm 2 [56]. However, in this experiment, we have only monitored the gain of the detector and investigated its stability under continuous radiation.…”

“…The count rate is found to increase with the increase of HV and reaches a plateau. At plateau, the count rate is found to be ∼ 350 kHz [56].…”

“…Total 4 sum-up boards are used in this prototype. The Lemo output of the 4 sum-up boards are again summed and is directly connected by a short length Lemo cable to a 6485 Keithley Pico-ammeter to measure the total anode current [56].…”

“…The source window diameter is 7.3 mm. The details of the jig and mechanical structure of the detector are shown in Figure 3 [56].…”

“…This particular review article is based on the R&D activities done in the EHEP detector laboratory of Bose Institute, Kolkata on GEM detector, Straw tube detector and bakelite RPC [56,57,58,59,60,61,62].…”