High Voltage Measurements on Nine PFNS for the LHC Injection Kicker Systems

Each of the two LHC injection kicker magnet systems must produce a kick of 1.3 T. m with a flattop duration variable up to 7.86 ms, and rise and fall times of less than 900 ns and 3 ms, respectively. A kicker magnet system consists of four 5 W transmission line magnets with matched terminating resistors, four 5 W Pulse Forming Networks (PFNs) and two Resonant Charging Power Supplies (RCPSs). Six RCPSs and nine PFNs, together with associated switch tanks and dump switch terminating resistors, have been built at TRIUMF and all have been tested at up to 60 kV PFN voltage to ensure that the performance is within specification. This paper describes the HV measurements, compares these results with low voltage measurements and analyses the pulse performance of the PFNs. The measurements are compared with results from PSpice simulations.