GEM Detector Readout System for Transmission Measurements on the Vesuvio Instrument at ISIS

Nuclear Instruments designed the readout system for a novel 2D detector used for neutron transmission measurements on the VESUVIO experiment at the ISIS Facility (UK). The detector is based on a thick GEM and features 384 readout pads (channels). The readout architecture consists of a series of distributed boards, each equipped with a Kintex-7 FPGA implementing 64 TDCs with a resolution of 0.5 ns, double-hit resolution of 4 ns, and 64-bit timestamping. Each FPGA interfaces with four GEMINI ASICs, which provide the analog front-end processing.