Journal
PHYSICAL REVIEW LETTERS
Volume 96, Issue 11, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.96.114801
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We have demonstrated for the first time the production of highly polarized short-pulse positrons with a finite energy spread in accordance with a new scheme that consists of two-quantum processes, such as inverse Compton scattering and electron-positron pair creation. Using a circularly polarized laser beam of 532 nm scattered off a high-quality, 1.28 GeV electron beam, we have obtained polarized positrons with an intensity of 2x10(4) e(+)/bunch. The magnitude of positron polarization has been determined to be 73 +/- 15(stat)+/- 19(syst)% by means of a newly designed positron polarimeter.
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