| Paper |
Title |
Page |
| MPPE081 |
The Comparison of a New Beam-Tracking Code to the Acceleration Test
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4072 |
| |
- K. Yamamoto, S. Yamada, K. Yamamoto
NIRS, Chiba-shi
- T. Hattori
RLNR, Tokyo
- M. Okamura
RIKEN, Saitama
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A new beam-tracking code using a 3D electro-magnetic field map of a linac is being developed. In this code, beam dynamics including non-linear and dipole effects can be easily estimated based on simulated field maps provided by commercial 3D analysis software. To verify the code, we manufactured an IH-linac and acceleration test of the linac was carried out with proton beam. The simulated results were compared with the tested acceleration performances.
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| TPPT016 |
Development of Co-Based Amorphous Core for Untuned Broadband RF Cavity
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1511 |
| |
- T. Misu, M. Kanazawa, A. Sugiura, S. Yamada
NIRS, Chiba-shi
- K. Katsuki, K. S. Sato
Toshiba, Yokohama
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We have developed a co-based amorphous core as a new magnetic-alloy (MA) core for the loaded RF cavity. Because of its permeability found to be approximately twice as high as that of FINEMET, this MA core is an excellent candidate for constructing a compact broadband RF cavity with less power consumption. In this report, we present our recent studies of the co-based amorphous core’s physical properties, performance, and development.
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| RPAP007 |
Alternating-Phase-Focused Linac with Interdigital H-Mode Structure for Medical Injectors
|
1084 |
| |
- Y. Iwata, T. Fujisawa, T. Furukawa, S. H. Hojo, T. Honma, M. Kanazawa, N. M. Miyahara, T. Murakami, M. Muramatsu, K. Noda, H. Ogawa, M. Torikoshi, S. Yamada, K. Yamamoto
NIRS, Chiba-shi
- Y.F. Fujii, T. Mitsumoto, H. Tsutsui
SHI, Tokyo
- T. Fujimoto, H.O. Ogawa
AEC, Chiba
- V.V. Kapin
MEPhI, Moscow
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Tumor therapy using Heavy Ion Medical Accelerator in Chiba (HIMAC) has been performed at National Institute of Radiological Sciences (NIRS). With the successful clinical results over ten years, a project on developing compact accelerators has been started. To design these compact accelerators, a size of an injector as well as construction and operation costs plays an important role. To satisfy these requirements, we propose a compact injector consisting of a RFQ and Interdigital H-mode Drift-Tube-Linac (IH-DTL) having the resonant frequency of 200 MHz. The injector will accelerate carbon ion up to 4.0 AMeV. For the beam focusing of the IH-DTL, the method of Alternating-Phase-Focusing was employed. With the IH structure and rather high operating-frequency, the size of the cavities is compact; the radius is approximately 0.4 m, and the length of the RFQ and IH-DTL will be 2.5m and 3.5m respectively. The fabrication of the RFQ is in progress. For the IH-DTL, the full-scale model was fabricated. With the encouraging results of the electric field measurements, we are developing the final design of the IH-DTL. The fabrication of the entire injector will be completed at the end of 2005. The present status of our project will be shown.
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| FPAE004 |
Optical Matching of Slowly Extracted Beam with Transport System at HIMAC
|
910 |
| |
- T. Furukawa, K. Noda, E. Takada, M. Torikoshi, T.H. Uesugi, S. Yamada
NIRS, Chiba-shi
- T. Fujimoto, M. Katsumata, S. Shibuya, T. Shiraishi
AEC, Chiba
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The optical matching between the ring and the transport line plays important role in order to control the beam size and profile after the transport. At HIMAC, thus, we have studied the optical matching of the slowly extracted beam. As a result, it was verified that the beam size of the slowly extracted beam were controlled owing to the optical matching. It was also found that small deviation of quadrupole strength in the ring brings orbit distortion at the transport system.
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