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|a Alexander, T.
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|a Massachusetts Institute of Technology. Department of Physics
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|a Massachusetts Institute of Technology. Laboratory for Nuclear Science
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|a Jones, Benjamin James Poyner
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|a Collin, Gabriel Lewis
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|a Conrad, Janet
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|a Greene, A.
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|a Katori, Teppei
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|a Toups, Matthew
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|a Back, H. O.
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|a Pordes, S.
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|a Jones, Benjamin James Poyner
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|a Collin, Gabriel Lewis
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|a Conrad, Janet
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|a Greene, A.
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|a Katori, Teppei
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|a Toups, Matthew
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|a The effects of dissolved methane upon liquid argon scintillation light
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|b IOP Publishing,
|c 2014-07-15T12:38:45Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/88405
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|a In this paper we report on measurements of the effects of dissolved methane upon argon scintillation light. We monitor the light yield from an alpha source held 20 cm from a cryogenic photomultiplier tube (PMT) assembly as methane is injected into a high-purity liquid argon volume. We observe significant suppression of the scintillation light yield by dissolved methane at the 10 part per billion (ppb) level. By examining the late scintillation light time constant, we determine that this loss is caused by an absorption process and also see some evidence of methane-induced scintillation quenching at higher concentrations (50-100 ppb). Using a second PMT assembly we look for visible re-emission features from the dissolved methane which have been reported in gas-phase argon methane mixtures, and we find no evidence of visible re-emission from liquid-phase argon methane mixtures at concentrations between 10 ppb and 0.1%.
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|a National Science Foundation (U.S.) (NSF-PHY-1205175)
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|a National Science Foundation (U.S.) (NSF PHY-1211308)
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|a National Science Foundation (U.S.) (NSF PHY-1242585)
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|a United States. Dept. of Energy (DE-FG02-91ER40661)
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|a en_US
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|a Article
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|t Journal of Instrumentation
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