Performance of Alternating-Phase-Focused IH-DTL

A compact injector, designed for a medical accelerator complex, was constructed. It consists of an Electron-Cyclotron-Resonance Ion-Source (ECRIS) and two linacs, which are a Radio-Frequency-Quadrupole (RFQ) linac and an Alternating-Phase-Focused Interdigital H-mode Drift-Tube-Linac (APF IH-DTL) having the same operating frequency of 200 MHz. The compact injector can accelerate carbon ions of 12C4+ up to 4.0 MeV/u. Use of the APF IH-DTL enabled us to design the compact injector; the total length of the two linacs is approximately 6m. After installation of the compact injector, beam acceleration tests were performed. We have succeeded to accelerate carbon ions with satisfactory performance. An overview of the compact injector as well as results of the beam acceleration tests is described.Linac0