ESS FUNNEL DEVICE INVESTIGATION ACCELERATOR

The funneling system allows to reach the required ESS beam intensity of 107 mA in peak per micro pulse and in case of one frequency after funneling to fill each separatrix in accelerator, which results in the lower intensity in each bunch. We have developed the resonant method of funnelling [1]. It is based on the multi-gap deflector. The new idea differs from another ones [2] by the possibility to organize the π -mode standing wave deviation system. The method has the higher efficiency. Three different cavities with 352 MHz for the funneling have been investigated experimentally. The field distribution, the tuning and the cooling system have been tested and compared with the numerical results. The beam dynamics has been calculated numerically in the real field for the energy 5 MeV and 25 MeV. For both options the emittance growth does not exceed 5% and 10% in case of bunch frequency 350 MHz and 175 MHz correspondently.