Geiger Mode APD performance in a cryogenic two-phase Ar avalanche detector based on THGEMs
arXiv:1003.1597 · doi:10.1016/j.nima.2010.07.002
Abstract
Characteristic properties of a Geiger Mode APD (G-APD) in a THGEM-based cryogenic two-phase Ar avalanche detector were studied in view of potential applications in rare-event experiments. G-APD signal amplitude and noise characteristics at cryogenic temperatures turned out to be superior to those at room temperature. The effective detection of avalanche scintillations from THGEM-multiplier holes in two-phase Ar has been demonstrated using a G-APD without wavelength shifter. At an avalanche gain of 60, the avalanche scintillation yield measured by the G-APD was as high as 0.9 photoelectrons per avalanche electron, extrapolated to 4pi acceptance.
4 pages, 8 figures. Presented at Vienna Conference on Instrumentation (Feb 15-20, 2010, Vienna, Austria). Submitted to the Proceedings
References in corpus (6)
- A concise review on THGEM detectors
- Optical readout tracking detector concept using secondary scintillation from liquid argon generated by a thick gas electron multiplier
- Detection of reactor antineutrino coherent scattering off nuclei with a two-phase noble gas detector
- Electron emission properties of two-phase argon and argon-nitrogen avalanche detectors
- First results of the two-phase argon avalanche detector performance with CsI photocathode
- Recent results on the properties of two-phase argon avalanche detectors