Physics – Instrumentation and Detectors
Scientific paper
2003-01-06
Nucl.Instrum.Meth. A500 (2003) 163-177
Physics
Instrumentation and Detectors
26 pages, 32 figures
Scientific paper
10.1016/S0168-9002(03)00338-3
A MicroCAT (Micro Compteur A Trous) structure which is used for avalanche charge multiplication in gas filled radiation detectors has been optimised with respect to maximum electron transparency and minimum ion feedback. We report on the charge transfer behaviour and the achievable gas gain of this device. A three-dimensional electron and ion transfer simulation is compared to results derived from electric current measurements. Similarly, we present studies of the charge transfer behaviour of a GEM (Gas Electron Multiplier) by current measurements and simulations. Finally, we investigate the combination of the MicroCAT and the GEM by measurements with respect to the performance at different voltage settings, gas mixtures and gas pressures.
Besch Hans Juergen
Menk Ralf H.
Orthen Andre
Wagner Hendrik
Walenta Albert Heinrich
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