Developing Light Collection Enhancements and Wire Tensioning Methods for LArTPC Neutrino Detectors

UoM administered thesis: Master of Science by Research

  • Authors:
  • Fabio Spagliardi

Abstract

Liquid argon Time Projection Chambers (LArTPCs) are becoming widely used as neutrino detectors because of their image-like event reconstruction which enables precision neutrino measurements. They primarily use ionisation charge to reconstruct neutrino events. It has been shown, however, that the scintillation light emitted by liquid argon could be exploited to improve their performance. As the neutrino measurements planned in the near future require large-scale experiments, their construction presents challenges in terms of both charge and light collection. In this dissertation we present solutions developed to improve the performance in both aspects of these detectors. We present a new wire tensioning measurement method that allows a remote measurement of the tension of the large number wires that constitute the TPC anode. We also discuss the development and installation of wavelength shifting compound covered foils for the SBND neutrino detector at Fermilab, which is a technique proposed to augment light collection in LArTPCs. This included preparing a SBND-like mesh cathode and testing it in the Run III of LArIAT, a test beam detector also located at Fermilab. Finally, we present a study aimed at understanding late scintillation light emitted by recombining positive argon ions using LArIAT data, which could affect large scale surface detectors.

Details

Original languageEnglish
Awarding Institution
Supervisors/Advisors
Award date31 Dec 2017