Upgrade of the Sis18 Injection System*
نویسندگان
چکیده
SIS18 will serve as booster synchrotron for the proposed International Accelerator Facility FAIR [1] at GSI. The aim is to provide high intensity proton and low charge state heavy ion beams of e.g. U 28+ -ions with a repetition rate of 2.7 – 4 cycles per second. The operation with low charge state heavy ion beams requires modifications of the injection system. At present, the maximum field strength of the electrostatic septum is not sufficient for injection of U 28+ -beams at the standard energy of 11.4 MeV/u. Furthermore, by means of an increased acceptance, beam loss in the injection channel and corresponding desorption gas production shall be minimized. THE SIS18 INJECTION SYSTEM The injection system at the end of the transfer channel consists of an inflector magnet and an electrostatic septum. Both devices and their supply units will be replaced forming a new system as shown in figure 1 [2]. Figure 1: New injection system with curved inflector magnet and 300 kV electrostatic septum. DESIGN AND IMPROVMENTS OF THE
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