High Voltage Nanosecond Pulsers with Megahertz Repetition Frequency for Accelerator Applications

Summary form only given: Modern level of development of accelerator technology demands pulse generators with amplitude from hundreds of volts to tens of kilovolts, pulse duration of several nanoseconds and pulse repetition rate from several megahertz to tens of megahertz. Combination of high peak power and high repetition rate in single pulser is a highly complicated technical task which can only be solved by use of new all solid state switches. For such applications FID GmbH has developed own semiconductor FID and DRD devices which are capable of switching megawatt peak powers at the PRF of several megahertz. Implementation of new switches has allowed creation of new series of pulse generators with unique specifications. One of such generators is FPG 10-10MHF which outputs pulses with amplitude of 10 kV into 50 ohm at pulse repetition rate of about 10 MHz. Pulse rise time can be chosen in range from 0.7 ns to 1.5 ns. Pulse duration at half amplitude is from 1.5 ns to 3 ns. Voltage pulses are formed in burst mode with burst duration from several microseconds to several milliseconds. A very high stability of all specifications is provided. FPG 10-10MHF has several modifications with different combinations of parameters. Another series of high voltage pulsers is manufactured on the basis of model FPG 1-10MHF-S10. This generator forms square shaped pulses with amplitude of 500-1000 V into 25-100 ohm load. Rise and fall time can be selected in range from 2 to 10 ns. Pulse duration is user variable and can be adjusted between 10 and 1000 ns. PRF in burst mode can reach 20 MHz. Amplitude stability is better than 2% and timing jitter is not more than 50 ps. Pulsers like FPG 10-10MHF and FPG 1-20MHF-S10 are specially designed to operate into accelerator strip lines as well as many other applications.