Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 43: Instrumentierung
HK 43.6: Vortrag
Donnerstag, 20. März 2014, 15:30–15:45, HZ 8
THick Gas Electron Multiplier (THGEM) detector readout based on TDC-FPGAs — •Maximilian Büchele, Horst Fischer, Matthias Gorzellik, Tobias Grussenmeyer, Florian Herrmann, Phillip Jörg, Paul Kremser, and Sebastian Schopferer — for the THGEM group of the COMPASS collaboration, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg
The RD51 program has been investigating a novel photon detector technology called THGEM, aimed to be operated in future Ring Imaging Cherenkov (RICH) Counters. The THGEM design is adopted from the Gas Electron Multiplier (GEM) using Printed Circuit Board (PCB) material. The manufacturing process uses standard PCB drilling and etching techniques which allows to cover large detector areas at gains up to 106 in a mechanically robust and very cost-efficient manner. Promising results have also been obtained with a hybrid approach, which combines the THGEM with a Micromega layer to further suppress the ion back flow to the photocathode.
In the course of the RICH-1 detector upgrade of the COMPASS experiment at CERN, the existing Multi Wire Proportional Chambers will partly be replaced by a set of THGEMs. For the digital readout, we are designing a front-end board processing 384 detector channels by TDC-FPGAs. The boards reading a single THGEM chamber are connected in a star topology in order to exploit the data rate capability of the optical transceivers interfacing with the downstream data acquisition system.
Supported by BMBF, DFG and EU FP7 (Grant Agreement 283286).