Further studies of GEM performance in dense noble gases

Details Further studies of GEM performance in dense noble gases Further studies of GEM performance in dense noble gases

2002-11-25

arxiv.org/abs/physics/0211101v1

Nucl.Instrum.Meth. A513 (2003) 256-259

Physics

Instrumentation and Detectors

4 pages, 4 figures. Presented at the 6th Int. Conf. on Position Sensitive Detectors, Leicester, Sept 9-13, 2002

Scientific paper

We further study the performance of single, double and triple Gas Electron Multiplier (GEM) detectors in pure noble gases at high pressures, in the range of 1-10 atm. We confirm that light noble gases, in particular He and its mixtures with Kr, have the highest gain, reaching 10^6, and an unusual gain dependence on pressure. Effects of the number of GEMs, GEM hole diameter and pitch are investigated in detail. In He, avalanche-induced secondary scintillations are observed at high gains, using the metal photocathode. These results are relevant in the field of avalanche mechanism in noble gases and X-ray, neutron and cryogenic particle detectors.

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