Calibration of the charge and energy loss per unit length of the MicroBooNE liquid argon time projection chamber using muons and protons

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Adams C., Alrashed M., An R., Anthony J., Asaadi J., Ashkenazi A., ...More

JOURNAL OF INSTRUMENTATION, vol.15, no.3, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 3
  • Publication Date: 2020
  • Doi Number: 10.1088/1748-0221/15/03/p03022
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, Index Islamicus, INSPEC
  • Keywords: Calorimeters, dE/dx detectors, Neutrino detectors, Time projection chambers
  • Middle East Technical University Affiliated: No


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.