Characterization of ultracold neutron production in thin solid deuterium films at the PSI Ultracold Neutron source
We determined the ultracold neutron (UCN) production rate by superthermal conversion in the solid deuterium (sD\(_2\)) moderator of the UCN source at the Paul Scherrer Institute (PSI). In particular, we considered low amounts of less than \(20\,\)mol of D\(_2\), deposited on the cooled moderator ves...
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| creator | Bison, G Blau, B Chen, W P -J Chiu Daum, M Doorenbos, C Hild, N Kirch, K Kletzl, V Lauss, B Pais, D Rienäcker, I Ries, D Schmidt-Wellenburg, P Talanov, V Zsigmond, G |
| description | We determined the ultracold neutron (UCN) production rate by superthermal conversion in the solid deuterium (sD\(_2\)) moderator of the UCN source at the Paul Scherrer Institute (PSI). In particular, we considered low amounts of less than \(20\,\)mol of D\(_2\), deposited on the cooled moderator vessel surfaces in thin films of a few mm thickness. We measured the isotopic (\( c_\text{HD} < 0.2 \, \% \)) and isomeric (\( c_\text{para} \le 2.7 \, \% \)) purity of the deuterium to conclude that absorption and up-scattering at \(5\,\)K have a negligible effect on the UCN yield from the thin films. We compared the calculated UCN yield based on the previously measured thermal neutron flux from the heavy water thermal moderator with measurements of the UCN count rates at the beamports. We confirmed our results and thus demonstrate an absolute characterization of the UCN production and transport in the source by simulations. |
| doi_str_mv | 10.48550/arxiv.2211.12126 |
| format | Article |
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In particular, we considered low amounts of less than \(20\,\)mol of D\(_2\), deposited on the cooled moderator vessel surfaces in thin films of a few mm thickness. We measured the isotopic (\( c_\text{HD} < 0.2 \, \% \)) and isomeric (\( c_\text{para} \le 2.7 \, \% \)) purity of the deuterium to conclude that absorption and up-scattering at \(5\,\)K have a negligible effect on the UCN yield from the thin films. We compared the calculated UCN yield based on the previously measured thermal neutron flux from the heavy water thermal moderator with measurements of the UCN count rates at the beamports. We confirmed our results and thus demonstrate an absolute characterization of the UCN production and transport in the source by simulations.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.2211.12126</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Deuterium ; Heavy water ; Neutron flux ; Physics - Accelerator Physics ; Physics - Instrumentation and Detectors ; Physics - Nuclear Experiment ; Thermal neutrons ; Thickness measurement ; Thin films</subject><ispartof>arXiv.org, 2023-03</ispartof><rights>2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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In particular, we considered low amounts of less than \(20\,\)mol of D\(_2\), deposited on the cooled moderator vessel surfaces in thin films of a few mm thickness. We measured the isotopic (\( c_\text{HD} < 0.2 \, \% \)) and isomeric (\( c_\text{para} \le 2.7 \, \% \)) purity of the deuterium to conclude that absorption and up-scattering at \(5\,\)K have a negligible effect on the UCN yield from the thin films. We compared the calculated UCN yield based on the previously measured thermal neutron flux from the heavy water thermal moderator with measurements of the UCN count rates at the beamports. We confirmed our results and thus demonstrate an absolute characterization of the UCN production and transport in the source by simulations.</description><subject>Deuterium</subject><subject>Heavy water</subject><subject>Neutron flux</subject><subject>Physics - Accelerator Physics</subject><subject>Physics - Instrumentation and Detectors</subject><subject>Physics - Nuclear Experiment</subject><subject>Thermal neutrons</subject><subject>Thickness measurement</subject><subject>Thin films</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNo9UF1LAzEQDIJgqf0BPhnw-WqyueTuHqX4USgqWJ-PvUtCU653NcmJ-uuNbfFlF2Zmh9kh5IqzeV5KyW7Rf7nPOQDncw4c1BmZgBA8K3OACzILYcsYA1WAlGJC_GKDHttovPvB6IaeDpaOXUzY0GnamzH6BO79oMf2wLuexk0aYeicpjoJ0u24o9Z1u0AxJtbQ17clff93eT65hGH0rbkk5xa7YGanPSXrh_v14ilbvTwuF3erDCupMmBWs4Y1jUIOwITQilmliyrXUOkib6DMhVVctXmFgIiMWaEkKllJw7UUU3J9tD0UUu-926H_rv-KqQ_FJMXNUZG--xhNiPU2BexTphoKUUHJCwXiF_riZ2k</recordid><startdate>20230314</startdate><enddate>20230314</enddate><creator>Bison, G</creator><creator>Blau, B</creator><creator>Chen, W</creator><creator>P -J Chiu</creator><creator>Daum, M</creator><creator>Doorenbos, C</creator><creator>Hild, N</creator><creator>Kirch, K</creator><creator>Kletzl, V</creator><creator>Lauss, B</creator><creator>Pais, D</creator><creator>Rienäcker, I</creator><creator>Ries, D</creator><creator>Schmidt-Wellenburg, P</creator><creator>Talanov, V</creator><creator>Zsigmond, G</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20230314</creationdate><title>Characterization of ultracold neutron production in thin solid deuterium films at the PSI Ultracold Neutron source</title><author>Bison, G ; Blau, B ; Chen, W ; P -J Chiu ; Daum, M ; Doorenbos, C ; Hild, N ; Kirch, K ; Kletzl, V ; Lauss, B ; Pais, D ; Rienäcker, I ; Ries, D ; Schmidt-Wellenburg, P ; Talanov, V ; Zsigmond, G</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a956-20fd0b0bb6a122033d60f6d794d29d74b2843f616c49a2aaa00f365a6595e1d53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Deuterium</topic><topic>Heavy water</topic><topic>Neutron flux</topic><topic>Physics - Accelerator Physics</topic><topic>Physics - Instrumentation and Detectors</topic><topic>Physics - Nuclear Experiment</topic><topic>Thermal neutrons</topic><topic>Thickness measurement</topic><topic>Thin films</topic><toplevel>online_resources</toplevel><creatorcontrib>Bison, G</creatorcontrib><creatorcontrib>Blau, B</creatorcontrib><creatorcontrib>Chen, W</creatorcontrib><creatorcontrib>P -J Chiu</creatorcontrib><creatorcontrib>Daum, M</creatorcontrib><creatorcontrib>Doorenbos, C</creatorcontrib><creatorcontrib>Hild, N</creatorcontrib><creatorcontrib>Kirch, K</creatorcontrib><creatorcontrib>Kletzl, V</creatorcontrib><creatorcontrib>Lauss, B</creatorcontrib><creatorcontrib>Pais, D</creatorcontrib><creatorcontrib>Rienäcker, I</creatorcontrib><creatorcontrib>Ries, D</creatorcontrib><creatorcontrib>Schmidt-Wellenburg, P</creatorcontrib><creatorcontrib>Talanov, V</creatorcontrib><creatorcontrib>Zsigmond, G</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection (ProQuest)</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bison, G</au><au>Blau, B</au><au>Chen, W</au><au>P -J Chiu</au><au>Daum, M</au><au>Doorenbos, C</au><au>Hild, N</au><au>Kirch, K</au><au>Kletzl, V</au><au>Lauss, B</au><au>Pais, D</au><au>Rienäcker, I</au><au>Ries, D</au><au>Schmidt-Wellenburg, P</au><au>Talanov, V</au><au>Zsigmond, G</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Characterization of ultracold neutron production in thin solid deuterium films at the PSI Ultracold Neutron source</atitle><jtitle>arXiv.org</jtitle><date>2023-03-14</date><risdate>2023</risdate><eissn>2331-8422</eissn><abstract>We determined the ultracold neutron (UCN) production rate by superthermal conversion in the solid deuterium (sD\(_2\)) moderator of the UCN source at the Paul Scherrer Institute (PSI). In particular, we considered low amounts of less than \(20\,\)mol of D\(_2\), deposited on the cooled moderator vessel surfaces in thin films of a few mm thickness. We measured the isotopic (\( c_\text{HD} < 0.2 \, \% \)) and isomeric (\( c_\text{para} \le 2.7 \, \% \)) purity of the deuterium to conclude that absorption and up-scattering at \(5\,\)K have a negligible effect on the UCN yield from the thin films. We compared the calculated UCN yield based on the previously measured thermal neutron flux from the heavy water thermal moderator with measurements of the UCN count rates at the beamports. We confirmed our results and thus demonstrate an absolute characterization of the UCN production and transport in the source by simulations.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.2211.12126</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Deuterium Heavy water Neutron flux Physics - Accelerator Physics Physics - Instrumentation and Detectors Physics - Nuclear Experiment Thermal neutrons Thickness measurement Thin films |
| title | Characterization of ultracold neutron production in thin solid deuterium films at the PSI Ultracold Neutron source |
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