Fundamentals of Gas Micropattern Detectors

Details Fundamentals of Gas Micropattern Detectors Fundamentals of Gas Micropattern Detectors

2001-06-05

arxiv.org/abs/physics/0106016v1

Physics

Instrumentation and Detectors

13 pages, 9 figures

Scientific paper

We performed a new series of systematic studies of gain and rate characteristics of several micropattern gaseous detectors. Extending earlier studies, these measurements were done at various pressures, gas mixtures, at a wide range of primary charges and also when the whole area of the detectors was irradiated with a high intensity x-ray beam. Several new effects were discovered, common to all tested detectors, which define fundamental limits of operation. The results of these studies allow us to identify several concrete ways of improving the performance of micropattern detectors and to suggest that in some applications RPCs may constitute a valid alternative. Being protected from damaging discharges by the resistive electrodes, these detectors feature high gain, high rate capability (10^5 Hz/mm^2), good position resolution (better than 30 micrometer) and excellent timing (50 ps sigma).

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