DEVELOPMENT OF MULTIPOLE WIGGLER AS AN INTENSE CIRCULARLY POLARIZED X-RAY SOURCE

There have been various ideas for generation of circularly polarized synchrotron radiation. Among them, this paper is concentrated on the novel multipole wiggler, elliptical multipole wiggler (EMPW), developed as an intense circularly polarized x-ray source at the National Laboratory for High Energy Physics. The EMPW has two jaws of magnet arrays. One jaw is coupled vertically and located along an electron beam axis to the other coupled horizontally with a phase difference of 1/4 magnetic period. In this article, spectral and technical performances of EMPW's are described as compared with those of asymmetric wiggler.