Calibration of the charge and energy loss per unit length of the MicroBooNE liquid argon time projection chamber using muons and protons
Author(s)
Ashkenazi, Adi; Carr, Rachel; Conrad, Janet M.; Diaz, Alejandro; Hen, Or; Hourlier, Adrien C.; Moon, Jarrett S.; Papadopoulou, Afroditi; Yates, Lauren Elizabeth; ... Show more Show less
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© 2020 IOP Publishing Ltd and Sissa Medialab. We describe a method used to calibrate the position- and time-dependent response of the MicroBooNE liquid argon time projection chamber anode wires to ionization particle energy loss. The method makes use of crossing cosmic-ray muons to partially correct anode wire signals for multiple effects as a function of time and position, including cross-connected TPC wires, space charge effects, electron attachment to impurities, diffusion, and recombination. The overall energy scale is then determined using fully-contained beam-induced muons originating and stopping in the active region of the detector. Using this method, we obtain an absolute energy scale uncertainty of 2% in data. We use stopping protons to further refine the relation between the measured charge and the energy loss for highly-ionizing particles. This data-driven detector calibration improves both the measurement of total deposited energy and particle identification based on energy loss per unit length as a function of residual range. As an example, the proton selection efficiency is increased by 2% after detector calibration.
Date issued
2020Department
Massachusetts Institute of Technology. Department of PhysicsJournal
Journal of Instrumentation
Publisher
IOP Publishing