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Author Natisin, M. R. ♦ Danielson, J. R. ♦ Surko, C. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ♦ CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ BUFFERS ♦ CAPTURE ♦ CARBON MONOXIDE ♦ ENERGY RESOLUTION ♦ POSITRON BEAMS ♦ PULSES ♦ SPATIAL RESOLUTION ♦ TEMPERATURE RANGE 0273-0400 K
Abstract A technique is described to produce a pulsed, magnetically guided positron beam with significantly improved beam characteristics over those available previously. A pulsed, room-temperature positron beam from a buffer gas trap is used as input to a trap that captures the positrons, compresses them both radially and axially, and cools them to 50 K on a cryogenic CO buffer gas before ejecting them as a pulsed beam. The total energy spread of the beam formed using this technique is 6.9 ± 0.7 meV FWHM, which is a factor of ∼5 better than the previous state-of-the-art, while simultaneously having sub-microsecond temporal resolution and millimeter spatial resolution. Possible further improvements in beam quality are discussed.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-01-11
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 2


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