17-22 July 2016
Master Cutlers Hall
Europe/London timezone

Cryogenic phonon-scintillation detectors with PMT readout for rare event search experiments

19 Jul 2016, 17:30
20m
Venue: Cutlers' Main Hall (First Floor); Chair: Luca Grandi; Session Manager: David Woodward ()

Venue: Cutlers' Main Hall (First Floor); Chair: Luca Grandi; Session Manager: David Woodward

Speaker

Mr. Junsong Lin (University of Oxford)

Description

Cryogenic phonon-scintillation detectors (CPSD) for rare event search experiments require reliable, efficient and robust photon detectors that can resolve individual photons in a scintillation event. We report on a cryogenic detector containing a scintillating crystal, equipped with an NTD-Ge phonon sensor and a photon detector based on a low-temperature photomultiplier tube (PMT) that is powered by a Cockcroft–Walton generator. Here we present results from the characterisation of two detector modules, one with CaWO4, the other with CaMoO4 as scintillator. The energy resolutions (FWHM) at 122.1 keV for the scintillation / PMT channel are 19.9% and 29.7% respectively for CaWO4 and CaMoO4 while the energy resolutions (FWHM) for the phonon channels are 2.17 keV (1.8%) and 0.97 keV (0.79%). These characteristics compare favourably with other CPSDs currently used in cryogenic rare-event search experiments. The detection module with PMT readout benefits from the implementation of a well-understood, reliable, and commercially available component and improved time resolution, while retaining the major advantages of conventional CPSD, such as high sensitivity, resolving power and discrimination ability.

Primary author

Dr. Xiaohe Zhang (Queen's University)

Co-authors

Prof. Hans Kraus (University of Oxford) Mr. Junsong Lin (University of Oxford) Dr. Vitaliy Mikhailik (Diamond Light Source)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×