Design of a polarized positron source for linear colliders

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

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

We propose a design of a polarized positron source for linear colliders. The design is based on electron-positron pair creation from polarized γ-rays which are produced by Compton scattering of circularly polarized laser light off a high-energy electron beam. Polarized positrons are created from those γ-rays incident on a thin conversion target. A future linear collider of the TeV-energy region requires an extraordinary large number of positrons (∼1 × 1010 positrons/bunch) in a multi-bunch time structure. To meet these requirements, our design employs a high-current, low-emittance electron beam of 5.8 GeV, 10 CO2 lasers, and 200 laser-electron collision-points. At each collision point, a pair of specially designed parabolic mirrors is installed to achieve efficient head-on collisions. This system allows us to produce high-intensity polarized γ-rays, which effectively generate high-intensity polarized positrons with the magnitude of polarization greater than 50%.

Original languageEnglish
Pages (from-to)232-252
Number of pages21
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume500
Issue number1-3
DOIs
Publication statusPublished - 2003 Nov 3

Keywords

  • Compton scattering
  • Linear collider
  • Polarized positron

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Fingerprint Dive into the research topics of 'Design of a polarized positron source for linear colliders'. Together they form a unique fingerprint.

  • Cite this