THE STUDY OF APF-IH LINAC

We manufactured an IH linac with Alternating Phase Focusing as a new high efficiency cavity for a medical accelerator injector. This linac was designed to accelerate C4+ ions from 40 keV/u up to 2MeV/u. In order to test this linac, a test stand was just assembled which consists of a P.I.G. ion source, bending magnets and focus lenses. The total length of the test stand is less than 5 m including 1.5 m of linac tank length. The operation frequency of the cavity is 100 MHz. In first phase of design process, simple thin lens approximation was adopted. Now we are developing a new beam-tracking code using 3D electro-magnetic simulation software (Micro Wave Studio, High Frequency Structure Solution, OPERA-3D). Using the new code, 3D- beam dynamics including non-linear effects can be easily estimated. We will report linac fabrication, the results of the test and the simulation code development