Scheme and Parameters of a 250-mA, 20 MeV CW Proton Accelerator*

Results of a configuration design trade study for a 250 mA, 20 MeV proton accelerator are presented. The accelerator design is based on High Intensity Low Beta Ion Linac (HILBILAC) with superconducting solenoid beam focusing. Two variants of the accelerator are analyzed. The first includes a HILBILAC section with output energy of 3 MeV and a number of DTL sections with quadrupole focusing. The second consists completely of HILBILAC sections. The main features of a HILBILAC based system are: absence of beam funneling, use of high operating frequency for acceleration of low emittance beam, high accelerating resonator efficiency. 1