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The Liquid Argon Purity Demonstrator [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. High Energy Physics Division, 2014.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages P07,005-P07,005 : digital, PDF file
Additional Creators
Fermi National Accelerator Laboratory, United States. Department of Energy. High Energy Physics Division, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The Liquid Argon Purity Demonstrator was an R&D test stand designed to determine if electron drift lifetimes adequate for large neutrino detectors could be achieved without first evacuating the cryostat. We describe here the cryogenic system, its operations, and the apparatus used to determine the contaminant levels in the argon and to measure the electron drift lifetime. The liquid purity obtained by this system was facilitated by a gaseous argon purge. Additionally, gaseous impurities from the ullage were prevented from entering the liquid at the gas-liquid interface by condensing the gas and filtering the resulting liquid before returning to the cryostat. The measured electron drift lifetime in this test was greater than 6 ms, sustained over several periods of many weeks. Measurements of the temperature profile in the argon, to assess convective flow and boiling, were also made and are compared to simulation.
Report Numbers
E 1.99:fermilab-pub-14-059-e
E 1.99: arxiv:1403.7236
arxiv:1403.7236
fermilab-pub-14-059-e
Subject(s)
Note
Published through SciTech Connect.
07/01/2014.
"fermilab-pub-14-059-e"
" arxiv:1403.7236"
"1287783"
Journal of Instrumentation 9 07 ISSN 1748-0221 FT
Adamowski, M.; Carls, B.; Dvorak, E.; Hahn, A.; Jaskierny, W.; Johnson, C.; Jostlein, H.; Kendziora, C.; Lockwitz, S.; Pahlka, B.; Plunkett, R.; Pordes, S.; Rebel, B.; Schmitt, R.; Stancari, M.; Tope, T.; Voirin, E.; Yang, T.
Funding Information
AC02-07CH11359
View MARC record | catkey: 24049202