The effects of dissolved methane upon liquid argon scintillation light
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 signif...
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2014
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| Online Access: | http://hdl.handle.net/1721.1/88405 https://orcid.org/0000-0002-9429-9482 https://orcid.org/0000-0003-1032-6496 https://orcid.org/0000-0002-6393-0438 https://orcid.org/0000-0001-6243-1453 |
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| author | Alexander, T. Back, H. O. Pordes, S. Jones, Benjamin James Poyner Collin, Gabriel Lewis Conrad, Janet Greene, A. Katori, Teppei Toups, Matthew |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Alexander, T. Back, H. O. Pordes, S. Jones, Benjamin James Poyner Collin, Gabriel Lewis Conrad, Janet Greene, A. Katori, Teppei Toups, Matthew |
| author_sort | Alexander, T. |
| collection | MIT |
| description | 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%. |
| first_indexed | 2024-09-23T16:56:01Z |
| format | Article |
| id | mit-1721.1/88405 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:56:01Z |
| publishDate | 2014 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/884052022-09-29T22:30:10Z The effects of dissolved methane upon liquid argon scintillation light Alexander, T. Back, H. O. Pordes, S. Jones, Benjamin James Poyner Collin, Gabriel Lewis Conrad, Janet Greene, A. Katori, Teppei Toups, Matthew Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Jones, Benjamin James Poyner Collin, Gabriel Lewis Conrad, Janet Greene, A. Katori, Teppei Toups, Matthew 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%. National Science Foundation (U.S.) (NSF-PHY-1205175) National Science Foundation (U.S.) (NSF PHY-1211308) National Science Foundation (U.S.) (NSF PHY-1242585) United States. Dept. of Energy (DE-FG02-91ER40661) 2014-07-15T12:38:45Z 2014-07-15T12:38:45Z 2013-12 2013-09 Article http://purl.org/eprint/type/JournalArticle 1748-0221 http://hdl.handle.net/1721.1/88405 Jones, B J P, T Alexander, H O Back, G Collin, J M Conrad, A Greene, T Katori, S Pordes, and M Toups. “The Effects of Dissolved Methane Upon Liquid Argon Scintillation Light.” Journal of Instrumentation 8, no. 12 (December 23, 2013): P12015–P12015. https://orcid.org/0000-0002-9429-9482 https://orcid.org/0000-0003-1032-6496 https://orcid.org/0000-0002-6393-0438 https://orcid.org/0000-0001-6243-1453 en_US http://dx.doi.org/10.1088/1748-0221/8/12/p12015 Journal of Instrumentation Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf IOP Publishing arXiv |
| spellingShingle | Alexander, T. Back, H. O. Pordes, S. Jones, Benjamin James Poyner Collin, Gabriel Lewis Conrad, Janet Greene, A. Katori, Teppei Toups, Matthew The effects of dissolved methane upon liquid argon scintillation light |
| title | The effects of dissolved methane upon liquid argon scintillation light |
| title_full | The effects of dissolved methane upon liquid argon scintillation light |
| title_fullStr | The effects of dissolved methane upon liquid argon scintillation light |
| title_full_unstemmed | The effects of dissolved methane upon liquid argon scintillation light |
| title_short | The effects of dissolved methane upon liquid argon scintillation light |
| title_sort | effects of dissolved methane upon liquid argon scintillation light |
| url | http://hdl.handle.net/1721.1/88405 https://orcid.org/0000-0002-9429-9482 https://orcid.org/0000-0003-1032-6496 https://orcid.org/0000-0002-6393-0438 https://orcid.org/0000-0001-6243-1453 |
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