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Title: Measurement of longitudinal electron diffusion in liquid argon

In this paper, we report the measurement of longitudinal electron diffusion coefficients in liquid argon for electric fields between 100 and 2000 V/cm with a gold photocathode as a bright electron source. The measurement principle, apparatus, and data analysis are described. In the region between 100 and 350 V/cm, our results show a discrepancy with the previous measurement. In the region between 350 and 2000 V/cm, our results represent the world's best measurement. Over the entire measured electric field range, our results are systematically higher than the calculation of Atrazhev-Timoshkin. The quantum efficiency of the gold photocathode, the drift velocity and longitudinal diffusion coefficients in gas argon are also presented.
Authors:
 [1] ;  [2] ;  [1] ; ORCiD logo [1] ;  [1] ;  [1] ; ORCiD logo [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Instrumentation Division
Publication Date:
Report Number(s):
BNL-111865-2016-JA
Journal ID: ISSN 0168-9002; R&D Project: PO-022; KA2201020
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 816; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Liquid argon time projection chamber; Electron diffusion; Electron drift velocity; Photocathode; Longitudinal diffusion; Electron mobility
OSTI Identifier:
1335409
Alternate Identifier(s):
OSTI ID: 1338847

Li, Yichen, Tsang, Thomas, Thorn, Craig, Qian, Xin, Diwan, Milind, Joshi, Jyoti, Kettell, Steve, Morse, William, Rao, Triveni, Stewart, James, Tang, Wei, and Viren, Brett. Measurement of longitudinal electron diffusion in liquid argon. United States: N. p., Web. doi:10.1016/j.nima.2016.01.094.
Li, Yichen, Tsang, Thomas, Thorn, Craig, Qian, Xin, Diwan, Milind, Joshi, Jyoti, Kettell, Steve, Morse, William, Rao, Triveni, Stewart, James, Tang, Wei, & Viren, Brett. Measurement of longitudinal electron diffusion in liquid argon. United States. doi:10.1016/j.nima.2016.01.094.
Li, Yichen, Tsang, Thomas, Thorn, Craig, Qian, Xin, Diwan, Milind, Joshi, Jyoti, Kettell, Steve, Morse, William, Rao, Triveni, Stewart, James, Tang, Wei, and Viren, Brett. 2016. "Measurement of longitudinal electron diffusion in liquid argon". United States. doi:10.1016/j.nima.2016.01.094. https://www.osti.gov/servlets/purl/1335409.
@article{osti_1335409,
title = {Measurement of longitudinal electron diffusion in liquid argon},
author = {Li, Yichen and Tsang, Thomas and Thorn, Craig and Qian, Xin and Diwan, Milind and Joshi, Jyoti and Kettell, Steve and Morse, William and Rao, Triveni and Stewart, James and Tang, Wei and Viren, Brett},
abstractNote = {In this paper, we report the measurement of longitudinal electron diffusion coefficients in liquid argon for electric fields between 100 and 2000 V/cm with a gold photocathode as a bright electron source. The measurement principle, apparatus, and data analysis are described. In the region between 100 and 350 V/cm, our results show a discrepancy with the previous measurement. In the region between 350 and 2000 V/cm, our results represent the world's best measurement. Over the entire measured electric field range, our results are systematically higher than the calculation of Atrazhev-Timoshkin. The quantum efficiency of the gold photocathode, the drift velocity and longitudinal diffusion coefficients in gas argon are also presented.},
doi = {10.1016/j.nima.2016.01.094},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 816,
place = {United States},
year = {2016},
month = {2}
}