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Onischenko, S. A.

Paper Title Page
MOPAN012 Development of the Injection- and Extraction Systems for the Upgrade of SIS18 167
  • U. B. Blell, J. Florenkowski, U. Kopf, C. Muehle, M. Petryk, I. J. Petzenhauser, P. J. Spiller
    GSI, Darmstadt
  • A. V. Batrakov, S. A. Onischenko, G. E. Ozur
    Institute of High Current Electronics, Tomsk
  SIS18 will serve as booster synchrotron for the proposed International Accelerator Facility FAIR at GSI. The aim is to provide high intensity proton and heavy ion beams of e.g. U28+-ions with a repetition rate of 2.7 - 4 cycles per second for injection into SIS100. The operation with low charge state heavy ions requires modifications of the injection and extraction systems. The goal is to minimize beam losses and thereby ion induced gas desorption during the injection and extraction processes. In order to increase the acceptance and for an injection at the reference energy it is necessary to build and install a new electrostatic inflector septum and a new inflector magnet. The electrostatic injection septum is designed for an operation at high field strength and enables a bake-out temperature of 300°C. This may be achieved by means of new cathode surface treatment procedures, e.g. with pulsed high intensity electron beams. Another technique is also under investigation, the coating of alumina by a plasma spray technique.