A new scheme of charge exchange injection for high intensity proton storage ring with high injection energy

A new charge-exchange injection scheme has been proposed which makes it possible to design a small beamloss proton storage ring. The charge-exchangers are composed of a magneto-neutralizer (H-→H0) which is a kind of the tapered half wave-length undulator, and an optomagneto-ionizer (H0→H+) which is composed of a ring laser used for resonant excitation of atoms and a tapered undulator used for ionization of the excited atoms. These devices could effectively exchange the charges of the injected beam with the Lorentz electric field generated by the interaction between the relativistic beam and the magnet field. The relativistic Doppler-shift and Lorentz-contraction effects can lighten very much the burdens of power and wave-length required to the laser specification. (author)