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Title: Calibrating the electromagnetic calorimeter of T2K
Author: George, Melissa
ISNI:       0000 0004 2709 6276
Awarding Body: Queen Mary, University of London
Current Institution: Queen Mary, University of London
Date of Award: 2010
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In this thesis, I describe the first calibration of the T2K ND280 electromagnetic calorimeter using cosmic muons. T2K is a long baseline neutrino oscillation experiment whose main aim is to observe for the first time the νμ→νe oscillations. A complete understanding of the νμ disappearance or νμ→νx oscillations, x = μ or τ , and neutrino-nucleon interactions will complete the T2K physics programme. T2K produces an intense muon neutrino beam at the J-PARC facility on Japan's East coast. This neutrino beam is then detected twice: once 280 m from its start by ND280 - whose purpose is to characterise the beam - and then again 295 km away at the far detector SuperKamiokande on the West coast of Japan. One of the components of the ND280 detector is the electromagnetic calorimeter. A thorough understanding of the electromagnetic calorimeter is crucial. In this thesis I first describe the quality assurance of the photosensors used in the calorimeter. Then I describe the cosmic muon flux simulation, that I adapted from CORSIKA for the electromagnetic calorimeter studies, and now adopted by the whole T2K collaboration. This is followed by a description of calibration of the calorimeter using the cosmic muon flux, in particular the light yield attenuation, and finally the comparison of the results obtained with cosmic muons taken at two different locations, CERN and Tokai. Moreover, I describe the ND280 Workbook, an online guide to the ND280 software, including tutorials and information for all the ND280 collaborators, that I developed in its entirety.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: T2K experiment ; electromagnetic calorimeter