@inproceedings{oai:repo.qst.go.jp:00054573,
 author = {Noda, Akira and Nakao, Masao and al., et and 野田 章 and 中尾 政夫},
 book = {IPAC2014: Proceedings of the 5th International Particle Accelerator Conference},
 issue = {14},
 month = {Aug},
 note = {Doppler laser cooling has been applied to low-energy (40 keV) 24Mg+ ions together with the Synchro-Betatron Resonance Coupling (SBRC) method at the S-LSR in ICR, Kyoto University. The S-LSR storage ring has a high super periodicity of 6 preferable from the beam dynamical point of view. Following the realization of one dimensional (1D) ordering of a 7 MeV proton beam, three dimensional (3D) laser cooling has been experimentally demonstrated for ions with non-negligible velocity (v/c=0.0019, c: light velocity). So as to suppress heating effects due to intra-beam scattering (IBS), the circulating ion beam intensity has been reduced by scraping and the normalized emittances: EPSn of 1.3×10-11 πm·rad and 8.5×10-12 πm·rad, corresponding to 6.4 K and 2.1 K, have been realized for the horizontal and vertical directions, respectively with a beam intensity of ~104 , which are the lowest temperatures ever attained by laser cooling. Molecular Dynamics (MD) computer simulation predicts the realization of the lowest beam temperatures of ~0.001 K and ~0.1 K corresponding to EPSn of the order of 10-13πm·rad and 10-12 πm·rad for the longitudinal and transverse directions, respectively. With the same condition as utilized for the real experiments at S-LSR, formation of a 1D longitudinal string is expected if the laser spot size and laser detuning are adjusted to the proper values of 1.5 mm and -42 MHz, respectively with ramping of the detuning. 3D ordered state is also predicted for a coasting beam with laser cooling utilizing dispersive cooling.},
 pages = {28--33},
 publisher = {JACoW},
 title = {Ultralow emittance beam production based on doppler laser cooling and coupling resonance},
 volume = {IPAC},
 year = {2014}
}