A Hybrid Solid State Induction Modulator for klystrons

Summary form only given. A solid state induction modulator was designed and operated for the Next Linear Collider accelerator project at SLAC (Stanford Linear Accelerator Center) to drive 8 X-band klystron. With the redirection of the NLC physics program, the remaining hardware from the DFM (Design for Manufacturability) modulator was combined with existing pulse transformers to fabricate two hybrid solid state induction modulators, one to drive two XK5 klystrons at 420 kV 400 A 1.5 mus and a second modulator to drive a single 5045 klystron to 360 kV 430 A 3.5 mus. These modulators use induction cells to drive a conventional pulse transformer. Both modulator are smaller and operate at a lower operating voltage than a equivalent modulator using thyratron and PFN. The modulator have been fabricated, tested, and are in operation. The design, implementation, and results will be describe in the paper.