Title :
TPC prototype readout with GEMs and TimePix
Author_Institution :
University of Freiburg, Hermann-Herder-Str. 3, 79104, Germany
Abstract :
This contribution reports on measurements with a GEM based TPC using the TimePix CMOS ASIC as a charge collecting readout anode. Tests on a small prototype with a 6mm drift space were performed in a 5 GeV electron beam at DESY. A Si-strip-telescope serves as spatial reference for the measured tracks. Two GEMs of different hole- and pitch-geometries are tested. The point resolution for short drift distances is better than 20 μm. A time resolution as good as 8 ns at 100MHz clock frequency is achieved. Furthermore, experimental studies with an enlarged pixel size are addressed.
Keywords :
Anodes; Application specific integrated circuits; Charge measurement; Clocks; Current measurement; Electron beams; Performance evaluation; Prototypes; Spatial resolution; Testing;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2008. NSS '08. IEEE
Conference_Location :
Dresden, Germany
Print_ISBN :
978-1-4244-2714-7
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2008.4774549