Production of high brightness γ rays through backscattering of laser photons on high-energy electrons

I. Sakai, T. Aoki, K. Dobashi, M. Fukuda, A. Higurashi, T. Hirose, T. Iimura, Y. Kurihara, T. Okugi, T. Omori, J. Urakawa, M. Washio, K. Yokoya

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Based on the requirements from a conceptual design of a polarized positron beam for future linear colliders, we constructed a special collision system with a short focal length of 150 mm of the laser beams so as to produce γ rays through inverse Compton scattering. In order to achieve efficient laser-electron collisions, we created a special optics to produce very small e --beam sizes of σ ex0 = 7.6 μm and σ ey0 = 5.4 μm in the horizontal and vertical directions at the collision point. Using laser light with a wavelength of 532 nm and an e - beam of 1.28 GeV provided from the ATF-damping ring at KEK, we generated 2 × 10 5 γ rays with a time duration of 26 ps in rms, leading to a peak brightness of 1.7 × 10 18/(mrad 2mm 20.1%bandwidth s) near to the maximum energy of 56 MeV.

Original languageEnglish
Article number091001
Pages (from-to)12-25
Number of pages14
JournalPhysical Review Special Topics - Accelerators and Beams
Volume6
Issue number9
DOIs
Publication statusPublished - 2003

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)
  • Surfaces and Interfaces

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    Sakai, I., Aoki, T., Dobashi, K., Fukuda, M., Higurashi, A., Hirose, T., Iimura, T., Kurihara, Y., Okugi, T., Omori, T., Urakawa, J., Washio, M., & Yokoya, K. (2003). Production of high brightness γ rays through backscattering of laser photons on high-energy electrons. Physical Review Special Topics - Accelerators and Beams, 6(9), 12-25. [091001]. https://doi.org/10.1103/PhysRevSTAB.6.091001