Very wide range and short accelerating cavity for MIMAS

The frequency ranges of electrical accelerating fields for heavy ion synchrotrons are often very wide. Their dynamics are limited by the physical characteristics of the magnetic load in the resonant structures. We built an accelerating system, with only one gap, using amorphous material, able to replace the two actual MIMAS cavities (the Saturne II booster), in order to make free a part of the ring. The frequency range can be swept at 4 kV. The RF voltage can be increased up to 10 kV, and the frequency to 12 MHz. The geometrical size was chosen to minimize the operation troubles during the cavities permutation on the machine.<>