Study of stability of gain and energy resolution for GEM detector in high rate operation

TL;DR

This paper investigates the stability of gain and energy resolution in a triple GEM detector under high-rate X-ray irradiation, considering environmental factors, with a novel approach of using the same source for irradiation and spectrum monitoring.

Contribution

It introduces a novel method where the same Fe55 source is used for both irradiation and spectrum monitoring, and studies the effects of temperature and pressure on detector stability.

Findings

Gain and energy resolution stability under high-rate X-ray exposure

Impact of temperature and pressure variations on detector performance

First test results demonstrating the method's effectiveness

Abstract

Study of the stability of gain and energy resolution for a triple GEM detector has been performed under continuous radiation of X-ray with high rate, using premixed gas of Argon and CO$_2$ in 70/30 ratio and conventional NIM electronics. A strong Fe$^{55}$ X-ray source is used for this study. The novelty of this study is that for the stability test same source is used to irradiate the GEM chamber and to monitor the spectrum. The radiation is not collimated to a point but exposed to a larger area. Effect of temperature and pressure on these parameters are also studied. The detail method of measurement and the first test results are presented in this article.