Magnetic field in a prototype kicker magnet for the KAON Factory

Kicker magnets are required for all ring-to-ring transfers in the 5 rings of the proposed KAON Factory. The kick must rise from 1% to 99% of full strength during the time interval of gaps (80 ns to 160 ns) created in the beam so that beam extraction losses are minimized. The “kick” strength must have a uniformity of ±1% over the useful aperture of the magnet. PE2D calculations have been performed to determine the uniformity of the combined electric and magnetic kick in the aperture of a TRIUMF prototype kicker magnet. Measurements of the magnetic field were performed with 50 Ω striplines while the prototype magnet was excited with a low voltage 1 MHz sine wave. The predicted and measured results for the magnetic field in the kicker magnet are in good agreement, and are presented. The circuit analysis code PSpice has been utilized to mathematically model the magnet and stripline probe, and the results of the simulations have provided a better understanding of the effect of parasitics upon the measurements