Recent results on the properties of two-phase argon avalanche detectors

Details Recent results on the properties of two-phase argon avalanche detectors Recent results on the properties of two-phase argon avalanche detectors

2008-07-03

arxiv.org/abs/0807.0530v1

Nucl.Instrum.Meth.A598:121-125,2009

Physics

Instrumentation and Detectors

6 pages, 11 figures. Presented at Xth Int. Conf. for Collid. Beam Phys., Feb 28 - March 6, 2008, Novosibirsk, to be published

Scientific paper

10.1016/j.nima.2008.08.016

The characteristic properties of two-phase Ar avalanche detectors, including those obtained with CsI photocathode, are further studied. Such detectors are relevant in the field of coherent neutrino-nucleus scattering and dark matter search experiments. The detectors investigated comprised a 1 cm thick liquid Ar layer followed by a triple-GEM multiplier. In these detectors, typical gains reaching 10000 were obtained with good reproducibility and a stable operation for at least one day was demonstrated. Amplitude and pulse-shape characteristics are presented under irradiation with X-rays, gamma-rays and neutrons from different radioactive sources. The detection of both primary scintillation and ionization signals at higher gains, at a deposited energy of 60 keV, has been demonstrated.

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