ION COOLER-STORAGE RING S-LSR

With S-LSR, electron cooling time of hot proton beam as large as 1% is found to be reduced from 40 sec. to 2.5 sec. by relative velocity sweep of the electron. Beam life time of 35 keV 24 Mg + ion beam with normal mode of full aperture is measured to be 14 sec., which is considered to be long enough to apply laser cooling. Three dimensional laser cooling is to be applied for both modes with and without dispersion. Tapered laser cooling with use of the Wien filter is also planned for realization of multi-layer 3D crystal.