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

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posted on 2023-06-10, 00:49 authored by Elisabeth FalkElisabeth Falk, Jeff HartnellJeff Hartnell, Charlie Mills, Martti Nirkko, James Edward PageJames Edward Page, Simon PeetersSimon Peeters, Michal RiganMichal Rigan, Sammy Valder
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.

Funding

STFC Experimental Particle Physics 2018 Consolidated Grant; G2740; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/S000798/1

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Journal of Instrumentation

ISSN

1748-0221

Publisher

Institute of Physics Publishing

Volume

16

Article number

aP10021

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2021-09-01

First Open Access (FOA) Date

2022-10-20

First Compliant Deposit (FCD) Date

2021-09-01

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