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HK: Fachverband Physik der Hadronen und Kerne

HK 20: Instrumentation VII

HK 20.6: Vortrag

Dienstag, 27. Februar 2018, 15:30–15:45, HZO 80

Beam test results for new DIRICH readout chain for MAPMTs and MCPs — •Vivek Patel, Joerg Foertsch, Karl - Heinz Kampert, and Christian Pauly for the CBM collaboration — Bergische Universitaet Wuppertal, Gauss Strasse 20,Wuppertal

The CBM RICH detector and the upgraded HADES RICH detector, will use Hamamatsu H12700 MAPMTs for photon detection. In a common effort of the HADES-, CBM-, and PANDA- collaborations, a new FPGA-based readout scheme for these MAPMTs (and for MCPs ) is being developed, focussing on excellent timing precision limited only by the Transit Time spread of the sensors (MAPMTs: 300ps, MCPs: 60 ps). The core element of this development is the 32ch DiRICH module. Signal discriminination, time-over-threshold measurement, as well as digital data handling are all implemented on a single Lattice ECP5 FPGA, providing a cost-effective and highly compact solution. It also has a low power consumption (12mW/amplifier, 50mW per channel). First prototypes of the DIRICH module were obtained last year and were throughly tested and are now ready for mass production. In November 2017 this DiRICH concept was tested at COSY under real beam conditions along with H12700 MAPMTs in a small prototype setup. In this talk we will present first results from the analysis of beam test data, focussing in particular on efficiency and ToT usage for crosstalk suppression. In addition we will also discuss the effect of a Wavelength Shifting coating (WLS) of the MAPMTs Supported by : BMBF grant 05P15PXFCA, and GSI.