Study of GEM-like detectors with resistive electrodes for RICH applications

Details Study of GEM-like detectors with resistive electrodes for RICH applications Study of GEM-like detectors with resistive electrodes for RICH applications

2007-12-13

arxiv.org/abs/0712.2179v1

Nucl.Instrum.Meth.A595:128-130,2008

Physics

Instrumentation and Detectors

Presented at the International Workshop RICH-2007, Trieste, Italy, October 2007

Scientific paper

10.1016/j.nima.2008.07.031

We have developed prototypes of GEM-like detectors with resistive electrodes to be used as RICH photodetectors equipped with CsI photocathodes. The main advantages of these detectors are their intrinsic spark protection and possibility to operate at high gain (~10E5) in many gases including poorly quenched ones, allowing for the adoption of windowless configurations in which the radiator gas is also used in the chamber. Results of systematic studies of the resistive GEMs combined with CsI photocathodes are presented: its quantum efficiency, rate characteristics, long-term stability, etc. On the basis of the obtained results, we believe that the new detector will be a promising candidate for upgrading the ALICE RICH detector

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