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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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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.
Forward citations
Cited by 2 Pith papers
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The High W Challenge: Robust Neutrino Energy Estimators for LArTPCs
The W²-based estimator shows the smallest bias versus true neutrino energy and greater stability to mismodelling of scattering and interactions than four common alternatives in LArTPC experiments.
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First Search for Neutral Current Coherent Single-Photon Production in MicroBooNE
The first search for neutrino-induced neutral-current coherent single-photon production finds no signal and sets a 90% CL cross-section limit of 1.49e-41 cm², about 24 times the Standard Model prediction.
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