|Author||Natisin, M. R. ♦ Danielson, J. R. ♦ Surko, C. M.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|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.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||Applied Physics Letters|
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