STUDY ON A HOM TYPE BUNCHER

Normally, drift tube linacs (DTL) are used following RFQ linacs for beam acceleration in middle and high beam energy region. The acceleration efficiency of DTLs is decreasing with beam energy increasing. Using resonated higher order mode (HOM) of cavity, DTL can achieve higher effective shunt impedance. We proposed a 325 MHz DTL with TE115 mode. In this paper, the dynamics calculation and electromagnetic design of the HOM-DTL will be reported.