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Measurement of space charge effects in the MicroBooNE LArTPC using cosmic muons

Journal Article · · Journal of Instrumentation
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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. Finally, 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.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Harvard Univ., Cambridge, MA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
MicroBooNE Collaboration
Grant/Contract Number:
AC02-07CH11359; AC02-76SF00515; SC0007859; SC0007881; SC0012704
OSTI ID:
1756292
Alternate ID(s):
OSTI ID: 1817853
OSTI ID: 1779202
OSTI ID: 1784019
OSTI ID: 1685026
OSTI ID: 23037220
Report Number(s):
BNL--220785-2021-JAAM
Journal Information:
Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 12 Vol. 15; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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Measurement of space charge effects in the MicroBooNE LArTPC using cosmic muons
Journal Article · Wed Dec 30 23:00:00 EST 2020 · JINST · OSTI ID:1685026

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Detector calibration
LArTPC
MicroBooNE
Space charge effects