Technique for calculating the circuit for shaping the given accelerating voltage pulse in linear induction accelerators

Duration of the flat-top region of the accelerating voltage pulse of a linear induction accelerator determines duration of beam current at the accelerator output. Methods of iterative synthesis of circuits for pulse shaping of the given form, permitting to reduce considerably the tuning time, are described. The methods are illustrated by shaping voltage pulse at the LUEh-1, 25-200 accelerator injector. The structure is determined and calculational formulae of circuit parameters are given. Spurious parameters of the circuit for shaping are taken into account in the physical model and when calculating transients using a computer. The three-dimensional characteristic of a ferromagnetic core is used when calculating. As calculations have shown, synthesis converges after 2-3 iterations. A double-link variant of the circuit for voltage pulse shaping in the cathode of an electron source is realized. Diagrams for voltage pulses at the injector, its physical model and a diagram of a pulse calculation shape are presented. The results obtained coincide well and testify to the correctness of synthesis problem solving