Author: Ondreka, D.
Paper Title Page
TUPPC005 Optimization of the SIS100 Nonlinear Magnet Scheme for Slow Extraction 1158
 
  • A. Saa Hernandez, M.M. Kirk, D. Ondreka, N. Pyka, S. Sorge, P.J. Spiller
    GSI, Darmstadt, Germany
 
  The SIS100 superconducting synchrotron was initially planned mainly for fast extraction of protons and heavy ions. Due to the delay of the construction of the SIS300 synchrotron, SIS100 has to be able to provide slowly extracted heavy ion beams to the experiments. To improve the robustness of the slow extraction from SIS100, a lattice review was performed, resulting in an optimization of the nonlinear magnet scheme. In the original scheme the Hardt condition cannot be established due to a collapse of the dynamic aperture caused by the chromatic sextupoles. In the optimized scheme the positions of the chromatic sextupoles are modified and octupoles are employed to compensate the second order effects of these sextupoles. In addition, the number of resonance sextupole magnets is reduced. With the new scheme, the Hardt condition can be established, leading to higher extraction efficiency. The separatrix can be freely adjusted, and closed orbit control is improved.  
 
THPPR001 Setting Generation for FAIR 3963
 
  • D. Ondreka, J. Fitzek, H. Liebermann, R. Müller
    GSI, Darmstadt, Germany
 
  The experimental program envisaged for the Facility for Antiproton and Ion Research (FAIR) requires complex operation schemes of its accelerators and beamlines including parallel operation of several experiments. Thus, there is a strong need to develop an appropriate setting generation system, which shall supply consistent settings for all devices across the facility to support the planned parallel operation modes. This system should also provide standard tools for modifying and accessing the settings. These requirements will be met by using LSA, a generic accelerator modeling framework developed at CERN, as basis for the setting generation system. We will report on the status of the setting generation system for FAIR, covering both the implementation of the physics model as well as the extensions to the LSA framework realized within a collaboration with CERN. Results of the first test runs with the existing GSI synchrotron SIS18 will be presented.