Long-term stability test of a triple GEM detector
R. P. Adak, S. Biswas, S. Das, D. Ghosal, S. K. Ghosh, A. Mondal, D., Nag, T. K. Nayak, R. N. Patra, S. K Prasad, S. Raha, P. K. Sahu, S. Sahu, and, S. Swain

TL;DR
This paper reports on a long-term stability test of a triple GEM detector's gain using a radioactive X-ray source, focusing on its performance over charge accumulation exceeding 12.0 mC/mm2.
Contribution
It introduces a simple method for long-term stability testing of GEM detectors and provides detailed results over extended charge accumulation.
Findings
Gain stability maintained over >12.0 mC/mm2 charge
Method demonstrates effective long-term performance assessment
Detailed fabrication and testing procedures provided
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 long- term 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/mm2. The details of the chamber fabrication, the test set-up, the method of measurement and the test results are presented in this paper.
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