ELECTRON COOLING FOR THE THERAPY ACCELERATOR COMPLEX

Institute of Nuclear Physics (BINP, Novosibirsk) is engaged in R&D of the new therapy accelerator system based on the electron cooling. The electron cooling is used for the ion beam accumulation in process of repeated multi turn injection into the main ring from the fast cycling booster synchrotron. After acceleration of the carbon ions up to 200-400 MeV/u the electron cooling is used for shrinking the beam emittance to minimal value and for further extraction and distribution of small fractions of the ion beam according to the irradiation program. The extraction systems base on the electron cooling is discussed in the report. The computer simulation results are in a good agreement with the experimental data of the electron cooling of the carbon ion beam with energy 400 MeV/u obtained resently during the CSRe commissioning (May 2009).