RESEARCH ON ACCEPTANCE OF SSC

The injection, acceleration and extraction of SSC<br />(Separate Sector Cyclotron） is analyzed and simulated<br />to get the transverse and longitudinal acceptance, using<br />two typical ions 238U36+ and 70Zn10+ with energy 9.7MeV/u<br />and 5.62MeV/u respectively. In order to study the actual<br />acceptance of SSC, the isochronous magnetic field model<br />in coincidence with the real one is established by Kr-Kb<br />and Lagrange methods based on the actual measurement.<br />The transverse and longitudinal acceptance is calculated<br />under the above isochronous magnetic field model. From<br />the simulation results, one of the major reason of low<br />efficiency and acceptance of SSC is the defaults in the<br />design of MSI3. The simulation results show that the<br />actual efficiency and acceptance of SSC can be improved<br />by redesign the curvature of MSI3 or shim in MSI3 to<br />change the distribution of inner magnetic field