A novel 5-cell strip-line kicker prototype for the HEPS on-axis injection system

Abstract

Two groups of 10ns-level superfast kickers are needed in the on-axis swap out injection scheme, adopted by the High Energy Photon Source (HEPS) to cope with the very small dynamic aperture of its baseline 7BA lattice design. In order to fit into the very tight longitudinal space in the injection/extraction region, and to relax the strength requirement of the kickers, five units of 300 mm long strip-line kickers are placed into a single stainless-steel vacuum chamber, to form a very compact 5-cell kicker module. Such a novel 5-cell strip-line kicker module design and its prototype development are presented in this paper. The results of the time-domain reflectometer (TDR) test, the high voltage pulse test and the beam coupling impedance test show that the strip-line kickers can meet the requirements of HEPS.