RF optimization design of a 750 keV radio frequency quadrupole injector
The RF design of a 201.25 MHz,750 keV RFQ injector is described.A four-rod structure is chosen for the RF design.The essential parameters are obtained from the beam dynamics design.The structure parameters,including the height,width,thickness,distance,shape of supporting arms,radius of outer cavity,are optimized by numerical simulation.When the inter-electrode voltage is 80 kV,the peak power loss is 115.95 kW,the dipole factor is 1.004 and the field flatness is within 3.5%.The result of the RF structure design satisfies the physics requirement well.