Low power measurements on an AGS injection kicker magnet

The present AGS injection kickers at 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 as the size exceeds the AGS aperture. An 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 (70.10 12 protons/s) to 100 TP. R&D studies have been undertaken by TRIUMF, in collaboration with 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. TRIUMF has designed a 12.5 Omega transmission line kicker magnet with rise and fall times of 100 ns, 3% to 97%, and field uniformity of plusmn1% over 85% of the aperture, powered by matched 12.5 Omega pulse-forming lines. This paper describes the results of detailed capacitance and inductance measurements, on the prototype magnet, and compares these with predictions from electromagnetic simulations.