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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.