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Balewski, K.

  
Paper Title Page
WG104 Study of Dynamic Aperture for PETRA III Ring  
 
  • Y. J. Li, K. Balewski, W. Decking
    DESY, Hamburg
 
  PETRA III is a low emittance storage ring dedicated to synchrotron radiation. Twenty damping wigglers with a total length of 80 m are used to reduce horizontal emittance to 1 nm rad. For efficient injection in so called top-up mode, the dynamic aperture should be larger than 30 mm·mrad in horizontal plane. This paper presents the beam dynamics study for the damping wigglers, the choice of suitable tunes of machine, and the optimization of sextupoles configuration. The simulation results including magnetic errors and misalignment will be given.  
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WG522 Conceptual Fast Orbit Feedback Design for PETRA III  
 
  • G. K. Sahoo, K. Balewski, H. T. Duhme, J. Klute, I. Krouptchenkov, R. Neumann
    DESY, Hamburg
 
  PETRA III, a 6 GeV synchrotron light source will have a horizontal beam emittance of 1nm·rad and a 1% emittance ratio. As the vertical beam sizes are ~5–10 micron in the low gap undulator sections the beam position stability requirement in the vertical plane is between 0.5 and 1 micron whereas the stability requirement in the horizontal plane is more relaxed. In order to obtain and maintain the small emittances imposes tight tolerances on spurious dispersion and orbit quality and stability. A fast orbit feedback is foreseen to achieve the required orbit stability. The conceptual layout and the basic design parameters of this system will be described in this presentation  
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