Speaker
Description
Resistive anodes are employed in gaseous detectors to avoid or minimize the damaging effects of discharges and to protect the readout electronics. We have characterized discharges in Thick-GEM-based WELL configurations with and without resistive anodes, employing different charge evacuation mechanisms. We used a new method for the resistive detectors to identify gas breakdowns that occur when the total avalanche charge crosses a critical value. We measured the critical charge limit for the investigated detectors as a few 106 electrons, similar to the reported Raether limit for MPGDs. The discharge intensity and probability have been measured as a function of the applied voltage and the total produced charge (ref: arXiv:2204.09445). To study the effect of discharges, we developed a tool to produce controlled, localized discharges inside a detector. I will describe the method and present the effect of discharges on the detector performance.
