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Tanabe, M.

Paper Title Page
WEOCC01 Experimental Approach to Ultra-Cold Ion Beam at S-LSR 2035
  • A. Noda, M. Ikegami, T. Ishikawa, M. Nakao, T. Shirai, H. Souda, M. Tanabe, H. Tongu
    Kyoto ICR, Uji, Kyoto
  • H. Fadil, M. Grieser
    MPI-K, Heidelberg
  • I. N. Meshkov, A. V. Smirnov
    JINR, Dubna, Moscow Region
  • K. Noda
    NIRS, Chiba-shi
  Funding: The present work was supported from Advanced Compact Accelerator project by MEXT, Japan. Support from the 21COE at Kyoto University-Diversity and Universality in Physics- is also greatly appreciated.

S-LSR is a storage and cooler ring with the circumference of 22.56 m applied for an electron beam cooling of 7 MeV proton beam and laser cooling of 24Mg+ beam with 35 keV. From the measurement with the use of Schottky pich-up of the momentum spread of 7 MeV proton beam reducing the particle number to suppress the effect of intra-beam scattering,abrupt jump in fractional momentum spread and Schottky power has been observed, which is considered the 1 dimensional phase transition to the ordered state*. The situation has also been expected from numerical simulation**. Laser cooling with much stronger cooling force is expected to realize 2Dand 3D crystalline states if the maintenance condition can be satisfied. Experimental approaches to realize such a condition at S-LSR as dispersion free lattice and "tapered cooling" are also decribed in the present paper.

* A Noda, et al., , New Journal of Physics, 8 (2006)288.** A. Smirnov et al., Beam Science and Technology, 10 (2006) 6*** J. Wei, X-P, Li and A. M. Sessler, , Phys. Rev. Lett. 73 (1994) 3089.

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