Simulation of beam bunching with electron cooling for the ion storage ring of RIKEN RI-beam factory project

Beam bunching with electron cooling can be carried out under the control which keeps the momentum spread constant. Simulation of the bunching for a 150 MeV/u U/sub 328//sup 92+/ beam in DSR has been done in which space charge effects and a transverse nonlinear effect are taken into account. Results of the simulation are presented about the transition of the bunching and the longitudinal and transverse behavior of the beam near the equilibrium.