@article{oai:repo.qst.go.jp:00044870, author = {Iwata, Yoshiyuki and Yamada, Satoru and Murakami, Takeshi and Fujimoto, Tetsuya and Fujisawa, Takashi and Ogawa, Hirotsugu and Miyahara, Nobuyuki and Yamamoto, Kazuo and Houjou, Satoru and Sakamoto, Yukio and Muramatsu, Masayuki and Takeuchi, Takeshi and et.al and 岩田 佳之 and 山田 聰 and 村上 健 and 藤澤 高志 and 小川 博嗣 and 宮原 信幸 and 山本 和男 and 北條 悟 and 坂本 幸雄 and 村松 正幸}, journal = {Nuclear Instruments & Methods in Physics Research Section A}, month = {Apr}, note = {A compact injector, designed for a heavy-ion medical accelerator complex, was constructed. It consists of an Electron-Cyclotron-Resonance Ion-Source (ECRIS) and two linacs, which are a Radio-Frequency-Quadrupole linac and an Interdigital H-mode Drift-Tube-Linac (IH-DTL) having the same operating frequency of 200 MHz. For beam focusing of the IH-DTL, the method of Alternating-Phase-Focusing (APF) was employed. The compact injector can accelerate heavy ions having a charge-to-mass ratio of q/m=1/3 up to 4:0MeV/u. Use of the APF IH-DTL and operating frequency of 200MHz allowed us to design compact linacs; the total length of the two linacs is less than 6m. Beam-acceleration tests of the compact injector system were performed. The measured intensity of accelerated 12C4+ beams with the compact injector was 380 emA. Beam transmission of the APF IH-DTL was estimated to be as high as 96%, which is comparable to the value calculated by a simulation code. Transverse phase-space and energy distributions of accelerated beams were measured and compared with those calculated by the simulation code, and we found that they were agreed well with each other.}, pages = {1007--1021}, title = {Performance of a compact injector for heavy-ion medical accelerators}, volume = {572}, year = {2007} }