Optimization and test of sub-harmonic buncher for Shanghai Synchrotron Radiation Facility

This paper presents the physical design，optimization，structure，fabrication，microwave test results and operation of the 499.654 MHz subharmonic buncher for Shanghai Synchrotron Radiation Facility LINAC. The structure optimization of the 499.654 MHz sub-harmonic buncher has been carried out with two-dimensional finite difference method software Superfish and three-dimensional finite element method software HFSS. The optimized buncher has been developed and tested. The measurement results of the buncher agree well with the design values.During the beam target optimization it works very steadily．