Search

Since November 25th, 2004, the Sudbury Neutrino Observatory has been taking production data in its third and final phase. For this phase a 'Neutral-Current Detection (NCD) Array', consisting of 36 strings of 3He proportional counters and 4 strings of 4He proportional counters, was deployed in SNO's D 2O volume. It supplements the Cherenkov detector, consisting of 9456 photomultiplier tubes, present in the previous two phases by offering an independent measurement of the solar neutral current rate. The 3He counters detect neutrons from neutrino-deuteron neutral current interactions in the D 2O. We describe the calibration of this array. © 2011.

This contribution describes laboratory measurements designed to investigate the optical properties of linear alkybenzene (LAB). Presented here is the measurement of the scintillation light timing profiles due to alpha and beta-particle excitation, the calculation of alpha/beta discrimination capability based on these timing distributions, and the investigation of electron energy scale. © 2012 Elsevier B.V.

A study of several optical properties of linear alkylbenzene scintillator were made using a source deployment in the SNO+ detector. © 2012 Elsevier B.V.

Naturally occurring radioisotopes can produce neutrons by photodisintegration and Cherenkov events via beta/gamma decays. The techniques used to measure the radioisotopes in the heavy water target and light water shield in the third phase of SNO is discussed. © 2011 Elsevier B.V.