Speaker
Description
The GRAPES-3 experiment located at the Cosmic Ray Laboratory in Ooty India is home to the world’s largest muon telescope. It consists of 16 modules based on nearly 4000 proportional counters (PRCs). Another muon telescope of similar area is under construction. The old data acquisition (DAQ) system of the muon telescope is a conventional one which works on a hardware trigger generated by the coincidence of signals from the four layers of PRCs. The deadtime of the system is ~10%. A new field programmable gate array (FPGA) based trigger-less muon data acquisition (TMDAQ) system was developed using the high-level-trigger (HLT) read-out receiver card (H-RORC) boards which were used at LHC point 2, CERN, Geneva during Run I phase of LHC by ALICE experiment. The objective of the TMDAQ is to record the pulse characteristics, arrival time and pulse width of each pulse from an individual PRC continuously. For monitoring the performance of the PRCs and the hardware, various monitoring modules were developed along with SPI and USB communication modules, and a smart auto-reset algorithm was also incorporated in the design to add the redundancy of the DAQ. The deadtime of the new system is negligibly small. This system has been successfully installed in 50% modules of the existing muon telescope. We will present the design and unique features of the TMDAQ system along with some performance
| Session | Future Experiments and Detector Development |
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