Beam Dynamics of IPCR(Riken) Heavy Ion Linac

IPCR heavy ion linac is of a Wideröe type and its accelerating frequency is variable between 20 and 40 MHz. It is designed to accelerate ions with mass to charge ratios between 5 and 20 at these frequencies. Total voltage gain with six cavities is about 16 MV, the length of each cavity being three meters. Non-constancy of voltage between drift tube gaps against the change of a frequency gives large phase oscillations. Nevertheless, this results in very little effect on the transverse acceptance compared with that given by a constant distribution.