Background due to stored electrons following nuclear decays in the KATRIN spectrometers and its impact on the neutrino mass sensitivity
The KATRIN experiment is designed to measure the absolute neutrino mass scale with a sensitivity of 200 meV at 90% C.L. by high resolution tritium beta-spectroscopy. A low background level of 10 mHz at the beta-decay endpoint is required in order to achieve the design sensitivity. In this paper we d...
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| creator | Mertens, S Drexlin, G Fraenkle, F M Furse, D Glueck, F Goerhardt, S Hoetzel, M Kaefer, W Leiber, B Thuemmler, T Wandkowsky, N Wolf, J |
| description | The KATRIN experiment is designed to measure the absolute neutrino mass scale with a sensitivity of 200 meV at 90% C.L. by high resolution tritium beta-spectroscopy. A low background level of 10 mHz at the beta-decay endpoint is required in order to achieve the design sensitivity. In this paper we discuss a novel background source arising from magnetically trapped keV electrons in electrostatic retarding spectrometers. The main sources of these electrons are alpha-decays of the radon isotopes (219,220)Rn as well as beta-decays of tritium in the volume of the spectrometers. We characterize the expected background signal by extensive MC simulations and investigate the impact on the KATRIN neutrino mass sensitivity. From these results we refine design parameters for the spectrometer vacuum system and propose active background reduction methods to meet the stringent design limits for the overall background rate. |
| doi_str_mv | 10.48550/arxiv.1204.6213 |
| format | Article |
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Drexlin, G ; Fraenkle, F M ; Furse, D ; Glueck, F ; Goerhardt, S ; Hoetzel, M ; Kaefer, W ; Leiber, B ; Thuemmler, T ; Wandkowsky, N ; Wolf, J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a514-54f73b86f3ed09e34a0ecc4a7a53a8bb56a69eab6a35c79643d4b4b6f7f582633</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Alpha decay</topic><topic>Beta decay</topic><topic>Design parameters</topic><topic>Electrons</topic><topic>Neutrinos</topic><topic>Parameter sensitivity</topic><topic>Physics - Instrumentation and Detectors</topic><topic>Radon isotopes</topic><topic>Sensitivity</topic><topic>Spectrometers</topic><topic>Tritium</topic><toplevel>online_resources</toplevel><creatorcontrib>Mertens, S</creatorcontrib><creatorcontrib>Drexlin, G</creatorcontrib><creatorcontrib>Fraenkle, F M</creatorcontrib><creatorcontrib>Furse, D</creatorcontrib><creatorcontrib>Glueck, F</creatorcontrib><creatorcontrib>Goerhardt, S</creatorcontrib><creatorcontrib>Hoetzel, M</creatorcontrib><creatorcontrib>Kaefer, W</creatorcontrib><creatorcontrib>Leiber, B</creatorcontrib><creatorcontrib>Thuemmler, T</creatorcontrib><creatorcontrib>Wandkowsky, N</creatorcontrib><creatorcontrib>Wolf, J</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</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>Mertens, S</au><au>Drexlin, G</au><au>Fraenkle, F M</au><au>Furse, D</au><au>Glueck, F</au><au>Goerhardt, S</au><au>Hoetzel, M</au><au>Kaefer, W</au><au>Leiber, B</au><au>Thuemmler, T</au><au>Wandkowsky, N</au><au>Wolf, J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Background due to stored electrons following nuclear decays in the KATRIN spectrometers and its impact on the neutrino mass sensitivity</atitle><jtitle>arXiv.org</jtitle><date>2012-04-27</date><risdate>2012</risdate><eissn>2331-8422</eissn><abstract>The KATRIN experiment is designed to measure the absolute neutrino mass scale with a sensitivity of 200 meV at 90% C.L. by high resolution tritium beta-spectroscopy. 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| subjects | Alpha decay Beta decay Design parameters Electrons Neutrinos Parameter sensitivity Physics - Instrumentation and Detectors Radon isotopes Sensitivity Spectrometers Tritium |
| title | Background due to stored electrons following nuclear decays in the KATRIN spectrometers and its impact on the neutrino mass sensitivity |
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