Abstract
A high gradient cavity (HGC) using high permeability magnetic alloy (MA) cores has been developed at KEK for the JHF (Japan Hadron Facility) proton synchrotrons. In this paper, we describe two types of push-pull amplifiers to drive the cavity, which were constructed for verifying the cavity performance. An accelerating voltage of 20 kV across the gap of the HGC was generated by the high power push-pull amplifier. This is equivalent to high gradient field of 50 kV/m. The other amplifier and the cavity were prepared for accelerating heavy ions at the HIMAC (Heavy Ion Medical Accelerator in Chiba). For this purpose, it is necessary to sweep the frequency over the wide range from 1 MHz to 8 MHz.
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