MAGNETIC-FIELD IN A PROTOTYPE KICKER MAGNET FOR THE KAON FACTORY

Kicker magnets are required for all ring-to-ring transfers in the 5 ri ngs 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) crea ted in the beam so that beam extraction losses are minimized. The ''ki ck'' strength must have a uniformity of +/- 1% over the useful apertur e of the magnet. PE2D calculations have been performed to determine th e uniformity of the combined electric and magnetic kick in the apertur e of a TRIUMF prototype kicker magnet. Measurements of the magnetic fi eld were performed with 50OMEGA striplines while the prototype magnet was excited with a low voltage 1 MHz sine wave. The predicted and meas ured results for the magnetic field in the kicker magnet are in good a greement, and are presented in this paper. Circuit analysis code PSpic e has been utilized to mathematically model the magnet and stripline p robe, and the results of the simulations have provided a better unders tanding of the effect of parasitics upon the measurements.