Speaker
Denis Pavlyuchenko
(Budker Inst. Novosibirsk)
Description
The performances of two-phase Ar and Xe avalanche detectors were studied,
aiming at their potential application in low-background experiments, such as
those of coherent neutrino-nucleus scattering and dark matter search. The
two-phase avalanche detector had a liquid Ar or Xe layer and a triple-GEM
multiplier operated in the saturated vapour above the liquid phase. The suc-
cessful operation of the two-phase Ar avalanche detector in a single electron
counting mode, in the gain range of 6000-40000, has been demonstrated. The
gain and stability characteristics were measured. The detector was shown to
be sensitive to weak signals produced by nuclear recoils from neutron scat-
tering and by 60 keV gamma-rays. The detection of the scintillation signal
produced in the liquid by beta-particles and gamma-rays is provided in the
two-phase Ar avalanche detector, the first GEM acting as a photocathode.
Author
Denis Pavlyuchenko
(Budker Inst. Novosibirsk)
