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Shirai, T.

Paper Title Page
D-06 Approach to 2 Dimensional Laser Cooling and its Optical Observation System 299
 
  • A. Noda, M. Nakao, H. Souda, H. Tongu
    Kyoto University/ICR, Kyoto
  • A.V. Smirnov
    JINR, Dubna
  • T. Shirai
    NIRS, Chiba-shi
  • K. Jimbo
    Kyoto University/IAE, Kyoto
  • M. Grieser
    MPI-K, Heidelberg
  
 

Funding: The present work was supported by Advanced Compact Accelerator Development program by MEXT of Japanese Government. Support from Global COE, The Next Generation of Physics, is also greatly appreciated.


Laser cooling for bunched Mg ion beam with the kinetic energy of 40 keV has been applied with S-LSR at ICR, Kyoto University. Up to now, clear peaking of equilibrium momentum spread after laser cooling has been observed at such a synchrotron tune as resonates with the horizontal betatron tune, which is considered to be due to heat transfer from the horizontal degree of freedom to the longitudinal one. In order to demonstrate transverse cooling by observation of reduction of the horizontal beam size, spontaneous emission from laser induced excited state of the Mg ion, has been observed with the use of CCD camera. Some reduction of horizontal beam size has been observed with a certain synchrotron tune, a little bit smaller compared with the fractional part of the horizontal tune.

  
G-04 Development of Raster Scanning at NIRS-HIMAC 370
 
  • T. Furukawa, T. Inaniwa, S. Sato, N. Saotome, S. Fukuda, T. Shirai, Y. Takei, Y. Iwata, A. Nagano, S. Mori, S. Minohara, T. Murakami, E. Takada, K. Noda
    NIRS, Chiba-shi
  • Y. Iseki, K. Hanawa, N. Kakutani, C. Yamazaki, Y. Kanai
    Toshiba, Tokyo
  • H. Izumiya, Y. Sano
    Accelerator Engineering Corp., Chiba
  
 

A new treatment facility project, as an extension of the existing HIMAC facility, has been initiated for the further development of carbon-ion therapy in NIRS. This new treatment facility will be equipped with a 3D irradiation system with pencil beam scanning. The challenge of this project is to realize treatment of a moving target by scanning irradiation. To accomplish practical moving target irradiation and to fix the final design, a prototype of the scanning irradiation system was constructed and installed into existing HIMAC experiment course. The system and the status of the beam test are described.