Scattering length monitoring with the Scattering Module at the SNO+ detector

Topical Research Meeting: Prospects in Neutrino Physics

Langrock, S.^1 ; Majumdar, K.^2

School of Physics and Astronomy, Queen Mary University of London, 327 Mile End Road, London

El 4NS, United Kingdom^1

Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford

OX1 3RH, United Kingdom^2

关键词: Neutrino oscillations;    Neutrinoless double-beta decays;    Rayleigh;    Scattered photons;    Scattering length;    Scattering property;    Verification process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/598/1/012021/pdf
DOI  :  10.1088/1742-6596/598/1/012021

来源: IOP

【 摘 要 】

SNO+ is a multipurpose detector built to investigate neutrinoless double-beta decay and neutrino oscillations. The Scattering Module is part of the SNO+ calibration program, and is designed to measure its scattering properties using laser pulses sent into the detector at different wavelengths. We describe the modules hardware and outline the general strategy for measuring the scattering length using a cut based analysis selecting direct in-beam photons and Rayleigh scattered photons. The cut verification process for a water-filled detector is presented. The efficiency of selecting scattered photons is found to be > 60% with a purity in excess of 95%.