Speaker
Description
Two resistive bulk-micromegas chambers were installed in May 2015 at the CERN Gamma Irradiation Facility exposed to an intense gamma irradiation with the aim to study the detector behavior under high irradiation and the long-term aging.
The chambers have an active area of 10 x 10 cm2, strip pitch of 400 μm, amplification gap of 128 μm and drift gap of 5 mm.
The desired accumulated charge of more than 0.2 C/cm2 has been reached for one of the chambers, equivalent to 10 years of HL-LHC operation. The efficiency, amplification, and resolution of the chamber after this long-term irradiation period will be compared with the performance of a non irradiated chamber.
In addition, the latest results of the measured particle rate as a function of the amplification voltage will be presented. These results will be compared with those obtained in October 2015 and presented in the last MPGD conference in 2015.
