Design, analysis and measurement of very fast kicker magnets at SLAC

Abstract

Recent experience with SLC bat ihown that very fart, ferriteloaded, transmission-line, beam-kicker magnet* can caute sig nificant and undesirable distortion of a 1.5-2.5 kA, 20-10 kV pulse aa it travel* through the magnet. In general, there ii a net lengthening of the pulae, with increases in it* riae and fall timea, a decrease in amplitude, and an unsymmetrical rounding of the flattop. In this partially tutorial treatiie, a number of practical design considerations are discussed in terms of equivalent cir cuits, magnet circuit dispersion and dissipation, undesired cir cuit shunting and coupling, high-voltage breakdown problems and high-order-mode losses that lead to beam tube beating. These effects are linked to the properties of the materials, the presence of radiation and realizable magnet topologies. Mea surements and calculations of some of these characteristics for several magnet designs are reviewed. The results presented come from a truly eclectic effort. 1.

Manufacture of fast-pulsed magnets for the SLC damping rings

“…Many of the early problems with these magnets [2] have been studied intensely during the last two years, and substantial progress has been made. These magnets operate on short-pulse voltages up to 35 kV.…”