The design of a high charge state all permanent ECR ion source

In recent years, many research activities on atomic physics have been carried out in the Institute of Modem Physics and - with the broadening of the research fields, besides the present electron cyclotron resonance ion source (ECRIS) in Lanzhou, some extra high performance ECR ion sources are demanded. Now, an ECRIS put on a high voltage (HV) platform, which can be applied to a HV up to 300 kV is under construction. For the sake of high electric power consumption and some critical engineering requirements, an all permanent magnet instead of a solenoid coil ECRIS is adopted. The axial magnetic mirror peaks are 1.45 and 1.17 T at the injection and extraction side, respectively. The inner diameter of the plasma chamber is designed to be 67 mm while keeping the radial magnetic field at the inner wall of the plasma chamber up to 1.2 T. Some interesting aspects on designing the hexapole as well as optimization design of the source will be presented. (C) 2004 American Institute of Physics.