Measurement of space charge effects in the MicroBooNE LArTPC using cosmic muons
Name
2008.09765.pdf
Description
Accepted version
Size
2.18 MB
Format
Adobe PDF
Checksum (MD5)
6b509151395d3067b78580b1f13f752f
Author(s)
Conrad, Janet
Date Issued
2020
Journal
Journal of Instrumentation
Publisher
IOP Publishing
Citation
Conrad, Janet. 2020. "Measurement of space charge effects in the MicroBooNE LArTPC using cosmic muons." Journal of Instrumentation, 15 (12).
Version
Author's final manuscript
Abstract
Large liquid argon time projection chambers (LArTPCs), especially those operating near the surface, are susceptible to space charge effects. In the context of LArTPCs, the space charge effect is the build-up of slow-moving positive ions in the detector primarily due to ionization from cosmic rays, leading to a distortion of the electric field within the detector. This effect leads to a displacement in the reconstructed position of signal ionization electrons in LArTPC detectors (“spatial distortions”), as well as to variations in the amount of electron-ion recombination experienced by ionization throughout the volume of the TPC. We present techniques that can be used to measure and correct for space charge effects in large LArTPCs by making use of cosmic muons, including the use of track pairs to unambiguously pin down spatial distortions in three dimensions. The performance of these calibration techniques are studied using both Monte Carlo simulation and MicroBooNE data, utilizing a UV laser system as a means to estimate the systematic bias associated with the calibration methodology.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/1748-0221/15/12/P12037
