Recent results on the properties of two-phase argon avalanche detectors
arXiv:0807.0530 · doi:10.1016/j.nima.2008.08.016
Abstract
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.
6 pages, 11 figures. Presented at Xth Int. Conf. for Collid. Beam Phys., Feb 28 - March 6, 2008, Novosibirsk, to be published in Nucl. Instr. Meth. A
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- Advances in Cryogenic Avalanche Detectors
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- Electroluminescence and electron avalanching in two-phase detectors
- Infrared scintillation yield in gaseous and liquid argon
- Electron emission properties of two-phase argon and argon-nitrogen avalanche detectors
- On the low-temperature performances of THGEM and THGEM/G-APD multipliers in gaseous and two-phase Xe
- Geiger Mode APD performance in a cryogenic two-phase Ar avalanche detector based on THGEMs
- GEMs with Double Layred Micropattern Electrodes and their Applications
- Study of infrared scintillations in gaseous and liquid argon - Part I: methodology and time measurements