München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 24: Instrumentation V

HK 24.8: Talk

Tuesday, March 19, 2019, 15:45–16:00, HS 11

Beam test results of the DiRICH based readout system for H12700 MAPMTs — •Vivek Patel, Christian Pauly, Karl - Heinz Kampert, and Joerg Foertsch — University of Wuppertal

The HADES RICH detecter has been fully upgraded using H12700 Multi Anode Photomultiplier Tube (MAPMT) from Hamamatsu and a DiRICH based readout system. A total of 428 MAPMTs and 856 DiRICHs are installed in the upgraded HADES RICH. This upgraded RICH will see its first beam in March 2019. The new FPGA based DiRICH readout chain has been developed as a joint effort of the CBM-, HADES- and TRB- collaborations and might also be used by PANDA DIRC and fRICH detectors. The new readout concept has been extensively tested over the last two years before finalizing the design prior to mass production for HADES RICH. In November 2017 this readout system was tested under real beam conditions at the COSY accelerator at the Juelich research facility. The talk will focus on analysis results of the test beam data from COSY particulary focusing on deriving proper time over threshold (ToT) information and later using it to suppress crosstalk from neighbouring MAPMT pixel. We will also present the improvement in Cherenkov ring reconstruction by using the ToT information.

Supported by BMBF grant 05P15PXFCA, and GSI.