The novel kicker magnet in HLS storage ring

A new local-bump injection system consisting of four kicker magnets at one drift space is under construction in NSRL Project Phase II. The kickers actually used in HLS storage ring have been designed for the old lattice-dependent injection system and can't meet with the demand of new system due to its low kick strength and efficiency. New kicker with high kick strength and efficiency has therefore been developed, using half-sine excitation. High saturated magnetic flux density and resistivity are required both for new kicker while the standard NiZn ferrite material is not appropriate. Profiting from the characteristics of MnZn ferrite, the window-frame kicker is therefore built-up, employing 15mm thick laminations. Finally, the distribution of magnetic field in the aperture and inductance of kicker have been measured and the results showed the excellent performance of new kicker. This paper presents the new kicker design as well as the field simulation and measurement results.