Author: Maier, R.
Paper Title Page
MOPPT003 20 Years of JULIC Operation as COSY's Injector Cyclotron 34
  • R. Gebel, R. Brings, O. Felden, R. Maier, S. Mey, D. Prasuhn
    FZJ, Jülich, Germany
  The accelerator facility COSY/Jülich is based upon availability and performance of the isochronous cyclotron JULIC as pre-accelerator of the 2.88 GeV cooler synchrotron. Since 1993 the cyclotron provides beams in 24/7 operation for more than 6500 hours/year on average. The cyclotron has been in operation since commissioning in 1968 and has reached in total 260000 hours of operation. JULIC provides routinely polarized and unpolarized negatively charged light ions for COSY experiments in the field of fundamental research in hadron, particle and nuclear physics. The ongoing program at the facility foresees increasing usage as a test facility for accelerator research and detector development for realization of FAIR, and other novel experiments on the road map of the Helmholtz Association and international collaborations. In parallel to the operation for COSY the cyclotron beam is used for irradiation and fundamental nuclide production for research purposes. A brief overview of activities at the Forschungszentrum Jülich, the cooler synchrotron COSY and its injector cyclotron JULIC, with focus on recent technical developments, will be presented.  
MOPPT030 Past, Present and Future Activities for Radiation Effects Testing at JULIC/COSY 88
  • S.K. Hoeffgen, S. Metzger
    FhG, Euskirchen, Germany
  • R. Brings, O. Felden, R. Gebel, R. Maier, D. Prasuhn
    FZJ, Jülich, Germany
  • M. Brugger, R. Garcia Alia
    CERN, Geneva, Switzerland
  The testing of radiation effects (displacement damage DD, single event effects SEE) with energetic protons for electronics used in space and accelerators is of growing importance. Setup and past experience of a dedicated test stand used by Fraunhofer INT at the JULIC cyclotron will be presented. For general DD testing and for testing SEE of the trapped protons in space, the energy of 35 MeV of the JULIC Cyclotron is usually sufficient. During solar proton events, as well as at high energy accelerators (CERN, FAIR), electronics are confronted with protons of much higher energy. Recent scientific studies have shown that for single event upsets* as well as destructive failures (e.g, single event latch-ups)** a cross section measured at energies in the tens oF one/two-hundred MeV range (e.g. PIF@PSI) can significantly underestimate the failure rate. To avoid unnecessary high safety margins there is a growing need for the opportunity to test electronics at several GeV, like the beam provided by the Cooler-Synchrotron COSY in Jülich.
*R. Garcia Alia et. al., accepted for publication, IEEE TNS (2013), DOI:10.1109/TNS.2013.2249096
**J. R. Schwank et al., IEEE TNS, vol. 52, pp2622 (2005)