Electromagnetic Modeling of the AGS A10 Injection Kicker Magnet

The present Alternating Gradient Synchrotron (AGS) injection kicker magnets at the A5 location were designed for 1.5 GeV proton injection. Recent high intensity runs have pushed the transfer kinetic energy to 1.94 GeV, but with an imperfect matching in transverse phase space. Space charge forces result in both fast and slow beam size growth and beam loss. A proposed increase in the AGS injection energy to 2 GeV with adequate kick strength would greatly reduce the beam losses making it possible to increase the intensity from 70 TP (70*10¹² protons/s) to 100 TP. R&D studies are being undertaken by TRIUMF, in collaboration with Brookhaven National Laboratory (BNL), to design two new kicker magnets for the AGS A10 location to provide an additional kick of 1.5 mrad to 2 GeV protons. The kick strength rise and fall time specifications are 100 ns, 3% to 97%; the design goal is to achieve a field uniformity, for protons, of plusmn3% over 90% of the cross-sectional area of the aperture. TRIUMF has proposed a design for a 12.5 Omega transmission line kicker magnet powered by a matched 12.5 Omega pulse forming line. This paper presents the results of detailed 2D and 3D electromagnetic modeling of the kicker magnet, and a novel mathematical model of the kicker