TY - JOUR
T1 - Design of a polarized positron source for linear colliders
AU - Omori, T.
AU - Aoki, T.
AU - Dobashi, K.
AU - Hirose, T.
AU - Kurihara, Y.
AU - Okugi, T.
AU - Sakai, I.
AU - Tsunemi, A.
AU - Urakawa, J.
AU - Washio, M.
AU - Yokoya, K.
PY - 2003/11/3
Y1 - 2003/11/3
N2 - 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%.
AB - 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%.
KW - Compton scattering
KW - Linear collider
KW - Polarized positron
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U2 - 10.1016/S0168-9002(02)01985-X
DO - 10.1016/S0168-9002(02)01985-X
M3 - Article
AN - SCOPUS:0037775650
SN - 0168-9002
VL - 500
SP - 232
EP - 252
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1-3
ER -