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Title: A study of breakdown limits in microstrip gas counters with preamplification structures
Authors: Fonte, P. 
Peskov, V. 
Ramsey, B. D. 
Issue Date: 1998
Citation: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 416:1 (1998) 23-31
Abstract: We have studied the charge and breakdown limits of Microstrip Gas Counters (MSGC's) with two different preamplification structures: the Gas Electron Multiplier (GEM) and the Parallel-Plate Avalanche Counter (PPAC). It was found that in both cases the breakdown limit was increased by 1-2 orders of magnitude compared to the bare MSGC and that this was due to the spreading of the primary electron cloud during pre-amplification. This spreading reduces the charge density in the final MSGC avalanche, permitting much higher total gains before streamers form. The real practical gain limitations in these two-stage detectors arose not from sparking, but from a loss of proportionality due to space charge effects.
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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