Zero-Suppression Trigger Mode for GEM Detector Measurement System

A novel approach to a trigger mode in the Gas Electron Multiplier (GEM) detector readout system is presented. The already installed at WEST tokamak. article briefly describes architecture of GEM and measurement system. Currently can work two modes: Global Trigger Local Trigger. All processing blocks are parts Charge Signal Sequencer module which responsible for transferring data PC. Therefore, presents structure with details about basic blocks, theirs functionality output configuration. algorithms implemented an FPGA chip from Xilinx. Trigger, default system, not efficient has limitations due storing much without any information. under tests, removes redundancy constructed send only valid data, but rest software, especially on PC side, still development. Therefore authors propose combines existing modes. proposed trigger, called Zero Suppression compatible interfaces also capable verify filter incoming signals transfer recognized events. results implementation simulation