An upgraded proton injection kicker magnet for the Fermilab MIR

In order to maximize the efficiency of the injection process into the Main Injector Ring, the beam gap required for the extraction and injection kickers can be reduced. A switching magnet which will achieve full field within 1% on the order of 30 to 40 nSec is required to achieve efficient transfers of beam between Booster and the MIR with the removal of only one bunch from the Booster ring. The magnet designed to perform this task is a 25 Ω traveling wave device which reaches its full field of 136 Gauss in 30 nSec. The field is developed across an aperture of 102 mm, 51 mm in width, by a pulse current of 1200 amps. To minimize reflections, the termination resistor has become an integral part of the magnet structure