14-17 September 2021
America/Los_Angeles timezone

Fluorescence light yield and time constants of acrylic (PMMA) excited with UV light

17 Sep 2021, 11:45
Detector techniques (HV, purification, cryogenics, calibration etc.) Detector Techniques (4B)


Emma Ellingwood (Queen's University)


Rare-event searches, like those for dark matter or neutrinoless double-beta decay, go to extreme lengths to mitigate various forms of background. Acrylic (poly(methyl methacrylate) or PMMA) is frequently used as a container for scintillating liquids in rare-event searches. Weak fluorescence has been observed in certain types of PMMA at room temperature, introducing a potential source of background. Building on previous work presented at LIDINE 2019, by using the optical cryostat with large numerical aperture located at Queen’s University, we quantify the light yield of the acrylic used in the DEAP dark matter search from room-temperature down to 4 K, and express it relative to the common wavelength shifter TPB. We also study the time constants involved.

Primary authors

Emma Ellingwood (Queen's University) Mr Hicham Benmansour (Queen's University)


Dr Philippe Di Stefano (Queen's University) Dr Peter Skensved (Queen's University)

Presentation Materials

There are no materials yet.