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Report No.

Reduction of the kicker impedance maintaining the performance of present kicker magnet at RCS in J-PARC

Shobuda, Yoshihiro ; Irie, Yoshiro*; Takayanagi, Tomohiro  ; Togashi, Tomohito; Yamamoto, Masanobu  ; Yamamoto, Kazami  

The present four-terminal kicker at the Rapid Cycling Synchrotron (RCS) at the Japan Proton Accelerator Research Complex (J-PARC) has the power-saving benefit due to the doubled excitation currents by shorting two-terminals. On the other hand, beam instabilities are excited by the kicker impedances. In this report, we describe a scheme to reduce the kicker impedances using diodes (nonlinear devices) with resistors, while retaining the benefit of the doubled kicker excitation currents.



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