HIAT2015 - List of Authors (Iwata, Y.)

Paper	Title	Page
MOPA18	A Racetrack-Shape Fixed Field Induction Accelerator for Giant Cluster Ions	83
	K. Takayama, T. Adachi, K. Okamura, M. Wake KEK, Ibaraki, Japan Y. Iwata NIRS, Chiba-shi, Japan
	Funding: Grants-In-Aid for Scientific　Research　（B)（KAKENHI　No. 15H03589) A novel scheme for a racetrack-shape fixed field induction accelerator (RAFFIA) capable of accelerating extremely heavy cluster ions (giant cluster ions) * is described. The key feature of this scheme is rapid induction acceleration by localized induction cells. Triggering the induction voltages provided by the signals from the circulating bunch allows repeated acceleration of extremely heavy cluster ions. Under the hypothesis that the RAFFIA is an induction synchrotron ** with an adiabatically varying circumference, the given RAFFIA example is capable of realizing the integrated acceleration voltage of 50 MV per acceleration cycle for C-60 (A=720 and Q=7). Using 90° bending magnets with a reversed field strip and field gradient is crucial for assuring orbit stability in the RAFFIA. Interesting beam physics such as resonance crossing during an acceleration cycle is discussed, including the structural stability of the cluster ion itself in the bending fields. * K.Takayama, T.Adachi, M.Wake, and K.Okamura, Phys. Rev. ST-AB 18, 050101(2015). ** K.Takayama and R.J. Briggs, Chapter 11 and 12 in Induction Synchrotron (Springer, Heidelberg, 2011).
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FRM1C01	Present Status of a Superconducting Rotating-Gantry for Carbon Therapy	288
	Y. Iwata, T. Furukawa, Y. Hara, S. Matsuba, S. Mori, K. Noda, S. Sato, T. Shirai, K. Shoda, R. Tansho NIRS, Chiba-shi, Japan N. Amemiya Kyoto University, Kyoto, Japan H. Arai, T. Fujimoto AEC, Chiba, Japan T.F. Fujita, K. Mizushima, Y. Saraya National Institute of Radiological Sciences, Chiba, Japan Y. Nagamoto, T. Orikasa, S. Takayama Toshiba, Yokohama, Japan T. Ogitsu KEK, Ibaraki, Japan
	A superconducting rotating-gantry for carbon therapy is being developed. This isocentric rotating gantry can transport carbon ions with the maximum energy of 430 MeV/u to an isocenter with irradiation angles of over 0-360 degrees, and is further capable of performing three-dimensional raster-scanning irradiation. The combined-function superconducting magnets were employed for the rotating gantry. The superconducting magnets with optimized beam optics allowed a compact gantry design with a large scan size at the isocenter; the length and the radius of the gantry are approximately 13 and 5.5 m, respectively, which are comparable to those for the existing proton gantries. Furthermore, the maximum scan size at the isocenter is calculated to be as large as approximately 200 mm square for heavy-ion beams at the maximum energy of 430 MeV/u. A construction and installation of the superconducting gantry is in progress, and beam commissioning will begin from this autumn. We will present a status of the superconducting rotating-gantry.
	Slides FRM1C01 [40.189 MB]
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Paper

Title

Page

A Racetrack-Shape Fixed Field Induction Accelerator for Giant Cluster Ions

83

K. Takayama, T. Adachi, K. Okamura, M. Wake
KEK, Ibaraki, Japan
Y. Iwata
NIRS, Chiba-shi, Japan

Funding: Grants-In-Aid for Scientific　Research　（B)（KAKENHI　No. 15H03589)
A novel scheme for a racetrack-shape fixed field induction accelerator (RAFFIA) capable of accelerating extremely heavy cluster ions (giant cluster ions) * is described. The key feature of this scheme is rapid induction acceleration by localized induction cells. Triggering the induction voltages provided by the signals from the circulating bunch allows repeated acceleration of extremely heavy cluster ions. Under the hypothesis that the RAFFIA is an induction synchrotron ** with an adiabatically varying circumference, the given RAFFIA example is capable of realizing the integrated acceleration voltage of 50 MV per acceleration cycle for C-60 (A=720 and Q=7). Using 90° bending magnets with a reversed field strip and field gradient is crucial for assuring orbit stability in the RAFFIA. Interesting beam physics such as resonance crossing during an acceleration cycle is discussed, including the structural stability of the cluster ion itself in the bending fields.
* K.Takayama, T.Adachi, M.Wake, and K.Okamura, Phys. Rev. ST-AB 18, 050101(2015).
** K.Takayama and R.J. Briggs, Chapter 11 and 12 in Induction Synchrotron (Springer, Heidelberg, 2011).

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FRM1C01

Present Status of a Superconducting Rotating-Gantry for Carbon Therapy

288

Y. Iwata, T. Furukawa, Y. Hara, S. Matsuba, S. Mori, K. Noda, S. Sato, T. Shirai, K. Shoda, R. Tansho
NIRS, Chiba-shi, Japan
N. Amemiya
Kyoto University, Kyoto, Japan
H. Arai, T. Fujimoto
AEC, Chiba, Japan
T.F. Fujita, K. Mizushima, Y. Saraya
National Institute of Radiological Sciences, Chiba, Japan
Y. Nagamoto, T. Orikasa, S. Takayama
Toshiba, Yokohama, Japan
T. Ogitsu
KEK, Ibaraki, Japan

A superconducting rotating-gantry for carbon therapy is being developed. This isocentric rotating gantry can transport carbon ions with the maximum energy of 430 MeV/u to an isocenter with irradiation angles of over 0-360 degrees, and is further capable of performing three-dimensional raster-scanning irradiation. The combined-function superconducting magnets were employed for the rotating gantry. The superconducting magnets with optimized beam optics allowed a compact gantry design with a large scan size at the isocenter; the length and the radius of the gantry are approximately 13 and 5.5 m, respectively, which are comparable to those for the existing proton gantries. Furthermore, the maximum scan size at the isocenter is calculated to be as large as approximately 200 mm square for heavy-ion beams at the maximum energy of 430 MeV/u. A construction and installation of the superconducting gantry is in progress, and beam commissioning will begin from this autumn. We will present a status of the superconducting rotating-gantry.

Slides FRM1C01 [40.189 MB]

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)