Optical calibration of the SNO+ detector in the water phase with deployed sources

, SNO+ Collaboration and Kormos, L. L. and O'Keeffe, H. M. (2021) Optical calibration of the SNO+ detector in the water phase with deployed sources. Journal of Instrumentation, 16 (10). ISSN 1748-0221

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Abstract

SNO+ is a large-scale liquid scintillator experiment with the primary goal of searching for neutrinoless double beta decay, and is located approximately 2 km underground in SNOLAB, Sudbury, Canada. The detector acquired data for two years as a pure water Cherenkov detector, starting in May 2017. During this period, the optical properties of the detector were measured in situ using a deployed light diffusing sphere, with the goal of improving the detector model and the energy response systematic uncertainties. The measured parameters included the water attenuation coefficients, effective attenuation coefficients for the acrylic vessel, and the angular response of the photomultiplier tubes and their surrounding light concentrators, all across different wavelengths. The calibrated detector model was validated using a deployed tagged gamma source, which showed a 0.6% variation in energy scale across the primary target volume.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Instrumentation
Additional Information:
This is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Instrumentation. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.1088/1748-0221/16/10/P10021
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2600/2610
Subjects:
ID Code:
160546
Deposited By:
Deposited On:
07 Oct 2021 11:05
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Oct 2021 05:24