Design of slow extraction for HIRFL-CSR main ring

The slow extraction of beam from CSR main ring(CSRm) is designed and simply simulated by Winagile program in this paper. The amplitude-momentum selection scheme is used, and both fast and slow extraction will be arranged in the same extraction passage. The third integer resonant scheme is adopted in slow extraction to obtain extracted beam with a horizontal emittance less than 1 πmm·mrad in about 1 second.