Development of a Single-Ended RF Acceleration Cavity in J-PARC RCS

Abstract

The Japan Proton Accelerator Research Complex (J-PARC) Rapid Cycling Synchrotron (RCS) employs magnetic alloy (MA) loaded cavities. We realize multi-harmonic rf driving and beam loading compensation owing to the broadband characteristics of the MA. The conventional type cavity is designed to be driven by tube amplifiers in a push–pull operation. However, some disadvantages arise for the push–pull operation to accelerate the high intensity beam. We have developed a single-ended MA cavity to avoid such disadvantages. The power consumption to drive the cavity can be fairly reduced by using the single-ended cavity.