Nichol, Ryan James; (2003) Calibration of the MINOS detectors. Doctoral thesis (Ph.D), UCL (University College London).

Text Calibration_of_the_MINOS_detec.pdf Download (25MB)

Abstract

The Main Injector Neutrino Oscillation Search (MINOS) project is a long baseline neutrino oscillation experiment, consisting of a beam of mainly muon neutrinos measured by two steel-scintillator calorimeters. The Near Detector will measure the beam spectrum before oscillations have a had a chance to occur significantly, with the Far Detector measuring the spectrum 735 km away. MINOS has been designed to achieve a relative energy scale calibration between the detectors to 2% and an absolute calibration to 5%. The relative calibration is performed using muons and the absolute using measurements from testbeams, taken with the purpose built Calibration Detector (CalDet). Results are presented from tests of the MINOS calibration chain, carried out using data from the CalDet and Far Detector. A strip to strip calibration of both the CalDet and Far Detector has been carried out using muons and the light injection system. This calibration has been performed to the 2% level at the CalDet. Results are shown of a cross detector calibration using beam related and cosmic ray muons, with momenta selected through range. Studies of the charge distribution of upward-going muons, which come from atmospheric neutrino interactions in the rock beneath the Far Detector, are presented. MINOS will be the first experiment that has been able to measure the charge of muons produced from atmospheric neutrinos.

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