GANIL: A Proposal for a National Heavy-Ion Laboratory

Under the control of the French Atomic Energy Commission (CEA) and of the National Institute of Nuclear and Particle Physics (I N2 P3) a multi accelerator system for heavy ions is beeing studied. The heart of this system consists of two identical conventionnal separated-sector cyclotrons K = 400 (SSC 1 and SSC 2); at the output of SSC 1 ions are stripped through a foil, high charge is selected and injected into SSC 2. The injection into SSC 1 will be achieved by a small compact cyclotron or by an 1 MV electrostatic accelerator. As the required beam must be intense and precise (energy resolution and emittance) special attention has been paid for a careful matching of the three stages of acceleration in transversal and longitudinal planes taking into account space charge forces as well as electric and magnetic defects. A set of parameters for the two main machines and their injectors is given.