15-20 June 2014
Laurentian University / Université Laurentienne
America/Toronto timezone
Welcome to the 2014 CAP Congress! / Bienvenue au congrès de l'ACP 2014!

Sensitivity of Alkali Halide Cryogenic Scintillation-Phonon Detectors to Dark Matter Signals

20 Jun 2014, 09:00
15m
C-112 (Laurentian University / Université Laurentienne)

C-112

Laurentian University / Université Laurentienne

Sudbury, Ontario
Oral (Student, Not in Competition) / Orale (Étudiant(e), pas dans la compétition) Particle Physics / Physique des particules (PPD) (F1-5) Future of Cosmic Frontier: Dark Matter III and Dark Energy - PPD-DTP / Avenir de la frontière cosmique: matière sombre III et énergie sombre - PPD-DTP

Speaker

Mr Michael Clark (Queen's University)

Description

Searches for particle dark matter are one of the most active fields in physics, with many experiments using different methods to search for possible dark matter candidates. Direct-detection experiments look for rare interactions between some detector mass and these dark matter particles. Cryogenic scintillator detectors have the advantage that there are many possible scintillator materials that can be used to optimize the experiment, and the low temperatures allow excellent background discrimination using phonon detectors. Our group at Queen's University has developed an optical cryostat to measure the properties of scintillators at low temperatures for possible use in cryogenic scintillator detectors. Alkali halide crystals show promise in this field because of their high light yield and fast scintillation time. The DAMA/LIBRA experiment utilizes Thallium-doped NaI (NaI(Tl)) crystals at room temperature to search for dark matter direct-detection, and have claimed a modulation signal for dark matter. We propose a cryogenic scintillator detector based on alkali halide crystals, to test this hypothesis with a similar target material as DAMA but with added background discrimination. We present the results of our experiments with alkali halide crystals at low temperatures, and apply them to determine the sensitivity of alkali halide cryogenic scintillation-phonon detectors to dark matter.

Primary author

Mr Patrick Nadeau (Queen's University)

Co-authors

Mr Michael Clark (Queen's University) Dr Philippe Di Stefano (Queen's University)

Presentation Materials