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High Efficiency Cyclotron Trap Assisted Positron Moderator
We report on the realisation of a cyclotron trap assisted positron tungsten moderator for the conversion of positrons with a broad keV–few MeV energy spectrum to a mono-energetic eV beam with an efficiency of 1.8(2)% defined as the ratio of the slow positrons divided by the β+ β+ activity of the rad...
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Published in: | Instruments (Basel) 2018-09, Vol.2 (3), p.10 |
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creator | Gerchow, Lars Braccini, Saverio Carzaniga, Tommaso Cooke, David Döbeli, Max Kirch, Klaus Köster, Ulli Müller, Arnold van der Meulen, Nicholas Vermeulen, Christiaan Rubbia, André Crivelli, Paolo |
description | We report on the realisation of a cyclotron trap assisted positron tungsten moderator for the conversion of positrons with a broad keV–few MeV energy spectrum to a mono-energetic eV beam with an efficiency of 1.8(2)% defined as the ratio of the slow positrons divided by the β+ β+ activity of the radioactive source. This is an improvement of almost two orders of magnitude compared to the state of the art of tungsten moderators. The simulation validated with this measurement suggests that, using an optimised setup, even higher efficiencies are achievable. A novel method for the production of 48 48 V high-activity thin foil positron sources based on a solid target station at a medical cyclotron was developed. This is an improvement of more than one order of magnitude with respect to standard methods. |
doi_str_mv | 10.3390/instruments2030010 |
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Braccini, Saverio ; Carzaniga, Tommaso ; Cooke, David ; Döbeli, Max ; Kirch, Klaus ; Köster, Ulli ; Müller, Arnold ; van der Meulen, Nicholas ; Vermeulen, Christiaan ; Rubbia, André ; Crivelli, Paolo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4000-d684cc39d0a89697affbb9ac5115f0b3d0778acaab60e771206dc537e3aaeaef3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Charged particles</topic><topic>cyclotron trap</topic><topic>Cyclotrons</topic><topic>Efficiency</topic><topic>Energy</topic><topic>Energy conversion efficiency</topic><topic>Energy spectra</topic><topic>Foils</topic><topic>International conferences</topic><topic>Laboratories</topic><topic>magnetic bottle</topic><topic>moderation</topic><topic>moderation efficiency</topic><topic>moderator</topic><topic>Moderators</topic><topic>Physics</topic><topic>positron</topic><topic>Positrons</topic><topic>thin film source</topic><topic>Titanium</topic><topic>Tungsten</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gerchow, Lars</creatorcontrib><creatorcontrib>Braccini, Saverio</creatorcontrib><creatorcontrib>Carzaniga, Tommaso</creatorcontrib><creatorcontrib>Cooke, David</creatorcontrib><creatorcontrib>Döbeli, Max</creatorcontrib><creatorcontrib>Kirch, Klaus</creatorcontrib><creatorcontrib>Köster, Ulli</creatorcontrib><creatorcontrib>Müller, Arnold</creatorcontrib><creatorcontrib>van der Meulen, Nicholas</creatorcontrib><creatorcontrib>Vermeulen, Christiaan</creatorcontrib><creatorcontrib>Rubbia, André</creatorcontrib><creatorcontrib>Crivelli, Paolo</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central</collection><collection>Advanced Technologies & Aerospace Collection</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>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>Science Database</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Publicly Available Content (ProQuest)</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>ProQuest Central Basic</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>Instruments (Basel)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gerchow, Lars</au><au>Braccini, Saverio</au><au>Carzaniga, Tommaso</au><au>Cooke, David</au><au>Döbeli, Max</au><au>Kirch, Klaus</au><au>Köster, Ulli</au><au>Müller, Arnold</au><au>van der Meulen, Nicholas</au><au>Vermeulen, Christiaan</au><au>Rubbia, André</au><au>Crivelli, Paolo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High Efficiency Cyclotron Trap Assisted Positron Moderator</atitle><jtitle>Instruments (Basel)</jtitle><date>2018-09-01</date><risdate>2018</risdate><volume>2</volume><issue>3</issue><spage>10</spage><pages>10-</pages><issn>2410-390X</issn><eissn>2410-390X</eissn><abstract>We report on the realisation of a cyclotron trap assisted positron tungsten moderator for the conversion of positrons with a broad keV–few MeV energy spectrum to a mono-energetic eV beam with an efficiency of 1.8(2)% defined as the ratio of the slow positrons divided by the β+ β+ activity of the radioactive source. 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subjects | Charged particles cyclotron trap Cyclotrons Efficiency Energy Energy conversion efficiency Energy spectra Foils International conferences Laboratories magnetic bottle moderation moderation efficiency moderator Moderators Physics positron Positrons thin film source Titanium Tungsten |
title | High Efficiency Cyclotron Trap Assisted Positron Moderator |
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