Proof examination of high efficiency IH-linac

An IH-linac which has features of high acceleration efficiency, a high energy gain and a low energy injection has been studied. An effect of End Ridge Tuner which characterizes electric-field distribution was investigated by a three-dimensional simulator. Also a half-scale cold model was constructed to confirm the distribution. To verify the design strategy to fulfill the features mentioned above, a test IH-linac has been manufactured. A shunt impedance of the linac was deduced by measuring energies of emitted X-rays from the cavity. These works proved that the IH structure can accommodate very low energy beam without pre-accelerator like RFQs and can accelerate up to several-tens times of injection energy in a short single-cavity.