Measurement of the longitudinal diffusion of ionization electrons in the MicroBooNE detector
Metadatos
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Institute of Physics Publishing
Materia
Charge transport and multiplication in liquid media Noble liquid detectors (scintillation, ionization, double-phase) Time projection Chambers (TPC)
Fecha
2021-09-22Referencia bibliográfica
The MicroBooNE collaboration... [et al.] 2021 JINST 16 P09025. [https://doi.org/10.1088/1748-0221/16/09/P09025]
Patrocinador
Fermi Research Alliance, LLC (FRA) DE-AC02-07CH11359; United States Department of Energy (DOE); National Science Foundation (NSF); Swiss National Science Foundation (SNSF); European Commission; Science and Technology Facilities Council (STFC), part of the United Kingdom Research and Innovation; Royal Society of London; Albert Einstein Center for Fundamental Physics, Bern, SwitzerlandResumen
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 similar to 70,000 through-going cosmic ray muon tracks tagged with MicroBooNE's cosmic ray tagger system, we measure D-L = 3.74(-0.29)(+0.28) cm(2)/s.