Jun 13 – 19, 2015
University of Alberta
America/Edmonton timezone
Welcome to the 2015 CAP Congress! / Bienvenue au congrès de l'ACP 2015!

Extraction of optical parameters in SNO+ with an in-situ optical calibration system

Jun 15, 2015, 2:45 PM
CCIS 1-140 (University of Alberta)

CCIS 1-140

University of Alberta

Oral (Non-Student) / orale (non-étudiant) Particle Physics / Physique des particules (PPD) M1-6 Neutrinoless Double-beta Decay I (PPD-DNP) / Double désintégration beta sans neutrino I (PPD-DPN)


Dr Kalpana Singh Singh (Department of Physics, University of Alberta)


SNO+ is a multi-purpose neutrino physics experiment investigating neutrinoless double beta decay and neutrino oscillations. The SNO+ detector consists of a 12m diameter acrylic vessel (AV), surrounded by ultra-pure water and approximately 9500 photomultiplier tubes (PMTs) which are positioned on a stainless steel PMT support structure (PSUP). The acrylic vessel will be filled with liquid scintillator. An in-situ optical calibration system based on LEDs and laser sources has been deployed. These optical sources feed light into the detector via optical fibres mounted on the PSUP, resulting in various beams of light. A collimated source will be used to measure the scattering in the liquid scintillator. Data have been taken while the AV was empty to understand the optical properties of the detector. We have analyzed the data to establish properties of the calibration system and to quantify the surface parameters, reflectivity and surface roughness responsible for scattering, as well as various parameters of the optical calibration system. These parameters will be a valuable input to the position and energy reconstruction algorithms, as well as the simulation, of SNO+.

Primary author

Dr Kalpana Singh Singh (Department of Physics, University of Alberta)

Presentation materials