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25 April 2024

» pubmed » pmid16605830

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Efficient propagation of polarization from laser photons to positrons through compton scattering and electron-positron pair creation
T Omori ; M Fukuda ; T Hirose ; Y Kurihara ; R Kuroda ; M Nomura ; A Ohashi ; T Okugi ; K Sakaue ; T Saito ; J Urakawa ; M Washio ; I Yamazaki ;
Date:	24 Mar 2006
Journal:	Phys Rev Lett, 96 (11), 114801
Abstract:	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 2 x 10(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.
Source:	PubMed, pmid16605830
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