Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 10: Instrumentation
HK 10.4: Vortrag
Montag, 4. März 2013, 11:45–12:00, WIL-A221
Electronic Readout for THGEM detectors based on FPGA TDCs — Tobias Baumann, Maximilian Büchele, Horst Fischer, Matthias Gorzellik, Tobias Grussenmeyer, •Florian Herrmann, Philipp Jörg, Kay Königsmann, Paul Kremser, Tobias Kunz, Christoph Michalski, Sebastian Schopferer, and Tobias Szameitat — Physikalisches Institut der Universität Freiburg for the COMPASS-II RICH upgrade Group
In the framework of the RD51 programme the characteristics of a new detector design, called THGEM, which is based on multi-layer arrangements of printed circuit board material, is investigated. The THGEMs combine the advantages for covering gains up to 106 in electron multiplication at large detector areas and low material budget. Studies are performed by extending the design to a hybrid gas detector by adding a Micromega layer, which significantly improves the ion back flow ratio of the chamber.
With the upgrade of the COMPASS experiment at CERN a MWPC plane of the RICH-1 detector will be replaced by installing THGEM chambers. This summarizes to 40k channels of electronic readout, including amplification, discrimination and time-to-digital conversion of the anode signals. Due to the expected hit rate of the detector we design a cost-efficient TDC, based on Artix7 FPGA technology, with time resolution below 100ps and sufficient hit buffer depth. To cover the large readout area the data is transferred via optical fibres to a central readout system which is part of the GANDALF framework.
Supported by BMBF and EU FP7 (Grant Agreement 283286).