[en] Gas Electron Multiplier (GEM) is a micro-pattern gaseous detector widely used in high energy physics experiments (HEP) for tracking because of its good position resolution and rate handling capability. GEM is made up of 50 μm Kapton foil with 5 μm copper cladding on both sides. A large number of holes are chemically etched using photolithography technique on the Kapton foil which acts as the multiplication region for the incoming charged particles. The presence of the di-electric medium inside the active volume of the detector changes its behavior when they are exposed to the external radiation. In this article, the charging up effect observed in a double mask triple GEM detector with different irradiation rates has been reported