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Article: A field-assisted moderator for low-energy positron beams

TitleA field-assisted moderator for low-energy positron beams
Authors
Keywords72.90
78.70
79.90
Issue Date1987
Citation
Applied Physics A Solids And Surfaces, 1987, v. 42 n. 2, p. 111-116 How to Cite?
AbstractA new positron field-assisted (FA) moderator based on the drift of positrons across a cooled silicon crystal is proposed. Using estimates for both the β + implantation profile and attainable drift velocities, the efficiency of drift to a slow e + emitting surface is calculated using a diffusion equation which incorporates terms describing positron drift and annihilation. It is conjectured that efficiencies of up to 10% can be achieved. The use of epitaxially grown metallic suicide contacts to facilitate the application of the electric field is described and the consequences of using such contacts are fully discussed. Applications of the FA transmission mode moderator described here to produce timed brightness enhanced beams are briefly discussed. © 1987 Springer-Verlag.
Persistent Identifierhttp://hdl.handle.net/10722/174681
ISSN
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorBeling, CDen_HK
dc.contributor.authorSimpson, RIen_HK
dc.contributor.authorCharlton, Men_HK
dc.contributor.authorJacobsen, FMen_HK
dc.contributor.authorGriffith, TCen_HK
dc.contributor.authorMoriarty, Pen_HK
dc.contributor.authorFung, Sen_HK
dc.date.accessioned2012-11-26T08:46:51Z-
dc.date.available2012-11-26T08:46:51Z-
dc.date.issued1987en_HK
dc.identifier.citationApplied Physics A Solids And Surfaces, 1987, v. 42 n. 2, p. 111-116en_HK
dc.identifier.issn0721-7250en_HK
dc.identifier.urihttp://hdl.handle.net/10722/174681-
dc.description.abstractA new positron field-assisted (FA) moderator based on the drift of positrons across a cooled silicon crystal is proposed. Using estimates for both the β + implantation profile and attainable drift velocities, the efficiency of drift to a slow e + emitting surface is calculated using a diffusion equation which incorporates terms describing positron drift and annihilation. It is conjectured that efficiencies of up to 10% can be achieved. The use of epitaxially grown metallic suicide contacts to facilitate the application of the electric field is described and the consequences of using such contacts are fully discussed. Applications of the FA transmission mode moderator described here to produce timed brightness enhanced beams are briefly discussed. © 1987 Springer-Verlag.en_HK
dc.languageengen_US
dc.relation.ispartofApplied Physics A Solids and Surfacesen_HK
dc.subject72.90en_HK
dc.subject78.70en_HK
dc.subject79.90en_HK
dc.titleA field-assisted moderator for low-energy positron beamsen_HK
dc.typeArticleen_HK
dc.identifier.emailBeling, CD: cdbeling@hkucc.hku.hken_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.authorityBeling, CD=rp00660en_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1007/BF00616719en_HK
dc.identifier.scopuseid_2-s2.0-0023289168en_HK
dc.identifier.volume42en_HK
dc.identifier.issue2en_HK
dc.identifier.spage111en_HK
dc.identifier.epage116en_HK
dc.identifier.isiWOS:A1987F718000003-
dc.identifier.scopusauthoridBeling, CD=7005864180en_HK
dc.identifier.scopusauthoridSimpson, RI=16460520700en_HK
dc.identifier.scopusauthoridCharlton, M=7102039759en_HK
dc.identifier.scopusauthoridJacobsen, FM=35838814800en_HK
dc.identifier.scopusauthoridGriffith, TC=16411780800en_HK
dc.identifier.scopusauthoridMoriarty, P=36853808500en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK

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