| New source of dense, cryogenic positron plasmas. | |
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MedLine Citation:
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PMID: 16090691 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We have developed a new method, based on the ballistic transfer of preaccumulated plasmas, to obtain large and dense positron plasmas in a cryogenic environment. The method involves transferring plasmas emanating from a region with a low magnetic field (0.14 T) and relatively high pressure (10(-9) mbar) into a 15 K Penning-Malmberg trap immersed in a 3 T magnetic field with a base pressure better than 10(-13) mbar. The achieved positron accumulation rate in the high field cryogenic trap is more than one and a half orders of magnitude higher than the previous most efficient UHV compatible scheme. Subsequent stacking resulted in a plasma containing more than 1.2 x 10(9) positrons, which is a factor 4 higher than previously reported. Using a rotating wall electric field, plasmas containing about 20 x 10(6) positrons were compressed to a density of 2.6 x 10(10) cm(-3). This is a factor of 6 improvement over earlier measurements. |
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Authors:
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L V Jørgensen; M Amoretti; G Bonomi; P D Bowe; C Canali; C Carraro; C L Cesar; M Charlton; M Doser; A Fontana; M C Fujiwara; R Funakoshi; P Genova; J S Hangst; R S Hayano; A Kellerbauer; V Lagomarsino; R Landua; E Lodi Rizzini; M Macrì; N Madsen; D Mitchard; P Montagna; A Rotondi; G Testera; A Variola; L Venturelli; D P van der Werf; Y Yamazaki; |
Publication Detail:
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Type: Journal Article Date: 2005-07-07 |
Journal Detail:
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Title: Physical review letters Volume: 95 ISSN: 0031-9007 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2005 Jul |
Date Detail:
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Created Date: 2005-08-10 Completed Date: 2005-09-01 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 025002 Citation Subset: - |
Affiliation:
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Department of Physics, University of Wales Swansea, Swansea SA2 8PP, United Kingdom. lars.varmingjorgensen@cern.ch |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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