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Title: A measurement of the group velocity of scintillation light in liquid argon

Abstract

The propagation velocity of scintillation light in liquid argon $$v_{g}$$, at $$\lambda \sim 128$$~nm wavelength, has been measured for the first time in a dedicated experimental setup at CERN. The obtained result $$\frac{1}{v_{g}} = 7.46 \pm 0.03$$~ns/m , is then used to derive the value of the refractive index (n) and the Rayleigh scattering length ($$\mathcal{L}$$) for liquid argon in the VUV region. For $$\lambda = 128$$~nm we found $$n= 1.357 \pm 0.001$$ and $$\mathcal{L}= (99.9 \pm 0.8$$)~cm. Such information are of interest for a variety of experiment searching for rare events like neutrino and dark matter interactions. The derived quantities also represent key information for the theoretical models describing the propagation of scintillation light in liquid argon.

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [2];  [2];  [4];  [5];  [2];  [5];  [6];  [7];  [2]
  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Polish Academy of Sciences (PAS), Krakow (Poland)
  2. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  4. Istituto Nazionale di Fisica Nucleare (INFN), Padova (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  5. Istituto Nazionale di Fisica Nucleare (INFN), Pavia (Italy)
  6. Istituto Nazionale di Fisica Nucleare (INFN), Milan (Italy)
  7. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Univ. of Bern (Switzerland)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1647079
Report Number(s):
arXiv:2002.09346; FERMILAB-PUB-20-397-ND
Journal ID: ISSN 1748-0221; oai:inspirehep.net:1781791
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Instrumentation
Additional Journal Information:
Journal Volume: 15; Journal Issue: 09; Journal ID: ISSN 1748-0221
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Babicz, M., Bordoni, S., Fava, A., Kose, U., Nessi, M., Pietropaolo, F., Raselli, G. L., Resnati, F., Rossella, M., Sala, P., Stocker, F., and Zani, A. A measurement of the group velocity of scintillation light in liquid argon. United States: N. p., 2020. Web. doi:10.1088/1748-0221/15/09/p09009.
Babicz, M., Bordoni, S., Fava, A., Kose, U., Nessi, M., Pietropaolo, F., Raselli, G. L., Resnati, F., Rossella, M., Sala, P., Stocker, F., & Zani, A. A measurement of the group velocity of scintillation light in liquid argon. United States. doi:10.1088/1748-0221/15/09/p09009.
Babicz, M., Bordoni, S., Fava, A., Kose, U., Nessi, M., Pietropaolo, F., Raselli, G. L., Resnati, F., Rossella, M., Sala, P., Stocker, F., and Zani, A. Tue . "A measurement of the group velocity of scintillation light in liquid argon". United States. doi:10.1088/1748-0221/15/09/p09009. https://www.osti.gov/servlets/purl/1647079.
@article{osti_1647079,
title = {A measurement of the group velocity of scintillation light in liquid argon},
author = {Babicz, M. and Bordoni, S. and Fava, A. and Kose, U. and Nessi, M. and Pietropaolo, F. and Raselli, G. L. and Resnati, F. and Rossella, M. and Sala, P. and Stocker, F. and Zani, A.},
abstractNote = {The propagation velocity of scintillation light in liquid argon $v_{g}$, at $\lambda \sim 128$~nm wavelength, has been measured for the first time in a dedicated experimental setup at CERN. The obtained result $\frac{1}{v_{g}} = 7.46 \pm 0.03$~ns/m , is then used to derive the value of the refractive index (n) and the Rayleigh scattering length ($\mathcal{L}$) for liquid argon in the VUV region. For $\lambda = 128$~nm we found $n= 1.357 \pm 0.001$ and $\mathcal{L}= (99.9 \pm 0.8$)~cm. Such information are of interest for a variety of experiment searching for rare events like neutrino and dark matter interactions. The derived quantities also represent key information for the theoretical models describing the propagation of scintillation light in liquid argon.},
doi = {10.1088/1748-0221/15/09/p09009},
journal = {Journal of Instrumentation},
issn = {1748-0221},
number = 09,
volume = 15,
place = {United States},
year = {2020},
month = {9}
}

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