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Measurement of the Longitudinal Diffusion of Ionization Electrons in the MicroBooNE Detector
- Publication Year :
- 2021
-
Abstract
- Accurate knowledge of electron transport properties is vital to understanding the information provided by liquid argon time projection chambers (LArTPCs). Ionization electron drift-lifetime, local electric field distortions caused by positive ion accumulation, and electron diffusion can all significantly impact the measured signal waveforms. This paper presents a measurement of the effective longitudinal electron diffusion coefficient, $D_L$, in MicroBooNE at the nominal electric field strength of 273.9 V/cm. Historically, this measurement has been made in LArTPC prototype detectors. This represents the first measurement in a large-scale (85 tonne active volume) LArTPC operating in a neutrino beam. This is the largest dataset ever used for this measurement. Using a sample of $\sim$70,000 through-going cosmic ray muon tracks tagged with MicroBooNE's cosmic ray tagger system, we measure $D_L = 3.74^{+0.28}_{-0.29}$ cm$^2$/s.<br />Comment: Changes following feedback from journal referee. Some wording changes, clarifications. Merged several figures to save on space
- Subjects :
- Physics - Instrumentation and Detectors
High Energy Physics - Experiment
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2104.06551
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1748-0221/16/09/P09025