Collaborators

It is widely understood that a polarized positron beam, as well as a polarized electron beam, will play a crucial roll in physics studies at ILC. Polarized positrons can be created through electron-positron pair creation from circularly polarized γ-rays. Laser-Compton scattering is an efficient method to generate circularly polarized γ-rays. In order to maximize the efficiency to produce intense γ-ray beam, we proposed to use laser pulse stacking cavity (optical cavity) and to install it in to an electron storage ring. The objective of the proposed experiment is to develop necessary technologies and to demonstrate efficient γ-ray generation; ie: • Design and fabricate laser pulse stacking cavities which have high enhancement factor and small spot size. • Design collision point which realizes minimal collision angle