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Further studies of GEM performance in dense noble gases

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arxiv physics/0211101 v1 pith:HVUGN2I4 submitted 2002-11-25 physics.ins-det hep-ex

V. Aulchenko , A. Bondar , A. Buzulutskov , L. Shekhtman , R. Snopkov , Yu. Tikhonov This is my paper
classification physics.ins-dethep-ex
keywords gasesnobledetectorsfurthergainhighperformanceavalanche
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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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