Readout Electronics of T0 Detector in the External Target Experiment of CSR in HIRFL

Abstract

Chambers (MRPC) technology, is one of the key components in the External Target Experiment. Through precision measurements of the MRPC signals, timing of the beam impact on target can be obtained and used as the start time for other detectors. A readout electronics system was designed for the T0 detector. Based on the NINO ASIC, front-end-electronics (FEE) circuits which can achieve high precision leading-edge discrimination and Charge-to-Time Conversion (QTC) were designed for the internal and external MRPCs of the T0 detector. The output pulse of the FEE is then digitized by high precision time digitization modules with Time-to-Digital Converters (TDCs), trigger matching and other control logic integrated within Field Programmable Gate Array (FPGA) devices. To evaluate the functionality and performance, we also conducted a series of tests of the electronics. Results indicate that the system functions well and the time precision of the electronics is better than 21 ps, which satisfies the application requirement.

Extensive beam test study of prototype MRPCs for the T0 detector at the CSR external-target experiment

“…6 shows photographs of the FEE and FPGA TDC modules. After the readout electronics being designed and tested [23], preliminary commissioning tests with the four T0-MRPC prototypes, including the two inner and two outer modules, were conducted in the laboratory with cosmic rays. Next, the whole system was fully tested with hadron and heavy-ion beams to study its performance in detail.…”