You are not logged in to this journal. Log in    |   Subscription Information

< Previous Article Next Article >

Phys. Rev. Lett. 96, 114801 (2006) [4 pages]

Efficient Propagation of Polarization from Laser Photons to Positrons through Compton Scattering and Electron-Positron Pair Creation

T. Omori,1 M. Fukuda,2 T. Hirose,3 Y. Kurihara,1 R. Kuroda,3,4 M. Nomura,2 A. Ohashi,5 T. Okugi,1 K. Sakaue,3 T. Saito,3 J. Urakawa,1 M. Washio,3 and I. Yamazaki3
1KEK: High Energy Accelerator Research Organization, Tsukuba-shi, Ibaraki 305-0801, Japan
2National Institute of Radiological Sciences, Chiba-shi, Chiba 263-8555, Japan
3Advanced Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555, Japan
4National Institute of Advanced Industrial Science and Technology, Tsukuba-shi, Ibaraki 305-8568, Japan
5Department of Physics, Tokyo Metropolitan Univeresity, Hachioji-shi, Tokyo 192-0397, Japan
Received 10 September 2005; published 24 March 2006

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.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.96.114801
DOI: 10.1103/PhysRevLett.96.114801
PACS: 29.27.Hj; 41.75.Fr
  • 29.27.Hj
    Polarized beams in accelerators
  • 41.75.Fr
    Electron and positron beams
  • YEAR: 2006
KEYWORDS: polarisation, positrons, laser beam effects, electrodynamics, photon polarisation, electron beams

REFERENCES (13)
View in Separate Window/Tab
For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.

CITING ARTICLES
For access to citing articles, you need to log in.
For access to citing articles, you need to Log in.



< Previous Article Next Article >

A new free weekly publication from APS

Physics - A new free weekly publication from APS
Please visit physics.aps.org
 
Article Tools