Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Instrumentation IX

HK 37.3: Vortrag

Mittwoch, 30. März 2022, 14:45–15:00, HK-H3

Investigations and improvements of the TRB3/DiRICH DAQ system used for the PANDA Barrel DIRC — •Merlin Böhm, Katja Gumbert, Steffen Krauss, Albert Lehmann, and Daniel Miehling for the PANDA collaboration — Physikalisches Institut , Universität Erlangen-Nürnberg

To identify charged and fast moving particles two DIRC (detection of internally reflected Cherenkov light) detectors will be built for the PANDA experiment at FAIR. A Barrel DIRC of 16 sectors surrounds the interaction point cylindrically and an endcap disc DIRC made of four identical quadrants covers the forward hemisphere. Since the focal planes of both DIRCs are located in a 1 Tesla B-field, Microchannel-Plate Photomultipliers (MCP-PMTs) are the only viable option to detect the generated Cherenkov photons. For the Barrel DIRC the FPGA based GSI TRB3/DiRICH data acquisition system is foreseen to read out the MCP-PMTs. Several improvements were applied to improve the performance of this DAQ system. E.g., with modifications of the power supply for the FPGAs on the TRB3 boards the timing precision was improved significantly. Furthermore, the TRB/DiRICH boards planned for the final PANDA experiment were operated in magnetic fields up to 3 T to investigate the B-field effects on the thresholds and pulse heights and different input stage modifications were tested. The recent modifications and the obtained measurement results will be shown and discussed in this talk.

- Funded by BMBF and GSI -