TY  - THES
AB  - A Time Projection Chamber (TPC) is an ideal candidate for the tracking system in experiments of particle physics as it has a low material budget and a large number of possible track points. Gas Electron Multipliers (GEMs) in combination with a highly segmented readout device give the possibility to achieve a very good performance in track reconstruction by getting good spatial and momentum resolutions. A TPC prototype with a drift length of 30 cm, using a triple GEM stack for amplification and a CMOS chip (Timepix chip) as a readout has been successfully operated at the University of Siegen. The Timepix chip consists of 256 x 256 identical elements, which can measure either time or charge of a particle track through the TPC. Each one of these pixels has a size of 55 µm x 55 µm. In order to avoid charging up effects of the used GEMs and to maintain a costant gain during time, GEMs coated with a carbon layer, which is supposed to have a thickness of approx. 0.1 µm, have been used. The resistivity of the diamond like carbon is in the range of 10 15 Ωm. The gain of the GEMs can be also increased by reducing the spark production between both GEM sides, so that higher electric fields can be applied.
AU  - Shahid, Saiqa
DA  - 2014
KW  - Zeitprojektionskammer
KW  - time projection chamber
KW  - Gas Electron Multiplier
KW  - Standard Model (Particle Physics)
LA  - eng
PY  - 2014
TI  - Development of a GEM based time projection chamber prototype using a pixelized readout system
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:467-8385
Y2  - 2024-12-27T10:37:06
ER  -