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

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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 2×104 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.

Original languageEnglish
Article number114801
JournalPhysical Review Letters
Volume96
Issue number11
DOIs
Publication statusPublished - 2006 Mar 30

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Omori, T., Fukuda, M., Hirose, T., Kurihara, Y., Kuroda, R., Nomura, M., Ohashi, A., Okugi, T., Sakaue, K., Saito, T., Urakawa, J., Washio, M., & Yamazaki, I. (2006). Efficient propagation of polarization from laser photons to positrons through compton scattering and electron-positron pair creation. Physical Review Letters, 96(11), [114801]. https://doi.org/10.1103/PhysRevLett.96.114801