Author: Noda, A.
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MOZA01 Ultralow Emittance Beam Production based on Doppler Laser Cooling and Coupling Resonance 28
 
  • A. Noda, M. Nakao
    NIRS, Chiba-shi, Japan
  • M. Grieser
    MPI-K, Heidelberg, Germany
  • Z.Q. He
    FRIB, East Lansing, Michigan, USA
  • Z.Q. He
    TUB, Beijing, People's Republic of China
  • K. Jimbo
    Kyoto University, Kyoto, Japan
  • H. Okamoto, K. Osaki
    HU/AdSM, Higashi-Hiroshima, Japan
  • A.V. Smirnov
    JINR, Dubna, Moscow Region, Russia
  • H. Souda
    Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan
  • H. Tongu
    Kyoto ICR, Uji, Kyoto, Japan
  • Y. Yuri
    JAEA/TARRI, Gunma-ken, Japan
 
  Funding: Work supported by Advanced Compact Accelerator Development project by MEXT of Japan. It is also supported by GCOE project at Kyoto University, “The next generation of Physics-Spun from Universality"
Doppler laser cooling has been applied to low-energy (40 keV) Mg ions together with the resonant coupling method* at the S-LSR at ICR, Kyoto University,. The S-LSR storage ring has a high super periodicity of 6, which is preferable from the beam dynamical point of view. At S-LSR one dimensional ordering of proton beam was already realized for the first time**. Active three dimensional laser cooling has been experimentally demonstrated for ions with un-negligible velocity (v/c=0.0019, where c is the light velocity) for the first time. Utilizing the above mentioned characteristics of S-LSR, an approach to realize ultralow emittances has been pursuit. To suppress heating effects, due to intra-beam scattering, the circulating ion beam intensity was reduced by scraping and beam emittances of 1.3·10-11 pi m·rad and 8.5·10-12 pi m·rad (normalized) have been realized for the horizontal and vertical directions, respectively with the 40 keV Mg ion beam at a beam intensity of ~104, which is the lowest emittance ever attained by laser cooling. From MD computer simulations, it is predicted that reduction of the ion number to about 103 is needed to realize a crystalline string.
* H. Okamoto, A.M. Sessler, D. Moehl, Phys. Rev. Lett. 72, 397 (1994).
** T. Shirai et. al., Phys. Rev. Lett. 98, 204801 (2007).
 
slides icon Slides MOZA01 [13.336 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOZA01  
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MOPRI080 Measurement of Beam Phase using Phase Probe at the NIRS-930 Cyclotron 794
 
  • S. Hojo, K. Katagiri, M. Nakao, A. Noda, K. Noda, A. Sugiura
    NIRS, Chiba-shi, Japan
  • T. Honma, A.K. Komiyama, T. Okada, Y. Takahashi
    AEC, Chiba, Japan
 
  The NIRS-930 cyclotron of the National Institute of Radiological Sciences (NIRS) has been used for production of short-lived radio-pharmaceuticals for PET, research of physics, developments of particle detectors in space, and so on. The NIRS-930 has twelve trim coils for generation of the isochronous fields. Until recently, currents of the twelve trim coils had been adjusted only by monitoring the beam intensity. In order to exactly produce the isochronous fields, a phase probe has been installed in the NIRS-930. Recent results of beam tests using the phase probe will be presented in the present work.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI080  
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MOPRI081 Beam Simulation for Improved Operation of Cyclotron NIRS-930 797
 
  • M. Nakao, S. Hojo, K. Katagiri, A. Noda, K. Noda, A. Sugiura
    NIRS, Chiba-shi, Japan
  • A. Goto
    Yamagata University, Yamagata, Japan
  • T. Honma, A.K. Komiyama, T. Okada, Y. Takahashi
    AEC, Chiba, Japan
  • V.L. Smirnov, S.B. Vorozhtsov
    JINR, Dubna, Moscow Region, Russia
 
  Beam simulation using SNOP* code has been performed for the cyclotron NIRS-930 at NIRS in order to study beam dynamics in a cyclotron and to improve beam intensity. Each electric or magnetic field (main coil, trim coils, harmonic coils, magnetic channel, gradient corrector, grazer lens, dee electrode, inflector) were calculated by OPERA-3d, and simulated injection, acceleration, and extraction. The simulation of proton with 30 MeV extracting energy with harmonic 1 was already performed and well simulated RF phase and extraction efficiency**. Then we tried to apply SNOP to 18 MeV protons with harmonic 2. We first formed isochronous magnetic field with main and trim coils for simulating single particle. Next we optimized electric deflector and magnetic channel in order to maximize extracted particles simulating the bunch of particles. Beam loss of the simulation was compared to the experiment. And then we are optimizing position and rotation of inflector and position of puller to improve injection. We intend to apply optimized simulation parameter to actual cyclotron operation to improve beam intensity and quality.
* V.L. Smirnov, S.B. Vorozhtsov, Proc. of RUPAC2012 TUPPB008 325 (2012)
** V.L. Smirnov et al., Proc. of IPAC2012 292 (2012)
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI081  
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WEPRO088 Design of Beam Transport Lines for Radioisotope Production Systems in NIRS Cyclotron Facility 2162
 
  • K. Katagiri, S. Hojo, M. Nakao, A. Noda, K. Noda, A. Sugiura, K. Suzuki
    NIRS, Chiba-shi, Japan
 
  A new beam transport and a irradiation system were designed for radionuclides production with heat damageable targets. The incident beam is swept along a circle on the irradiation target with fast steering magnets. The width and the sweeping radius of the incident beams were optimized to achieve high production efficiency and avoid the heat damages. Based on those optimized parameters, beam optics of the new beam transport lines was optimized. To obtain initial conditions for the optical calculations, the beam emittance and the Twiss parameters were measured at the upper stream of the new beam transport lines. In this paper, we present the results of the calculations and the optimized beam transport lines.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO088  
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THOAB01 Recent Progress and Future Plan of Heavy-ion Radiotherapy Facility, HIMAC 2812
 
  • K. Noda, T. Furukawa, Y. Hara, Y. Iwata, N. Kanematsu, K. Katagiri, A. Kitagawa, K. Mizushima, S. Mori, T. Murakami, M. Muramatsu, M. Nakao, A. Noda, S. Sato, T. Shirai, E. Takada, Y. Takei
    NIRS, Chiba-shi, Japan
 
  The first clinical trial with a carbon-ion beam generated from HIMAC was conducted in June 1994. Based on more than ten years of experience with HIMAC, a pilot facility of a standard carbon-ion radiotherapy facility in Japan, was constructed at Gunma University. Owing to the successfully operation of the pilot facility, Saga-HIMAT and i-ROCK in Kanagawa have been progressed. In addition, NIRS has developed the new treatment research project for the further development of radiotherapy with, based on the pencil-beam 3D scanning for both the static and moving targets. This treatment procedure has been successfully carried out with a pencil-beam 3D scanning since May 2011. Owing to the development of NIRS 3D scanning, the i-ROCK project decided to employ the NIRS 3D scanning. As a future plan, further, NIRS has developed a superconducting rotating gantry, and we are going to just start a study of a superconducting accelerator for the ion radiotherapy. The recent progress and the future plan of HIMAC for the heavy-ion cancer radiotherapy will be reported.  
slides icon Slides THOAB01 [10.523 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THOAB01  
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