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Wittenburg, K.

Paper Title Page
TUAZ01 Overview of recent halo diagnosis and non-destructive beam profile monitoring 54
 
  • K. Wittenburg
    DESY, Hamburg
 
  Beam profile (emittance) and beam halo are characteristic properties of high-intensity and high energy beams that might limit the performance of the adjacent accelerator. Therefore a reliable measurement and determination of these parameters is most helpful for understanding, tuning and improvement of the whole accelerator chain to achieve the best (at least the design-) performance. This talk will give an overview over recent instruments used for non-destructive beam profile and halo monitoring and will discuss their limits, experiences and latest improvements.  
WEAZ05 Very Fast Beam Losses at HERA, and what has been done about it 215
 
  • K. Wittenburg, M. Werner
    DESY, Hamburg
 
  During the Luminosity upgrade of HERA in 2000/2001 more than 50 new magnets were installed close to the interaction region to provide a stronger focussing of the two beams. Some of these magnets are located at very large values of the betatron function and therefore act with a large gain on the beam. Sudden changes in the power supply currents had led to very fast beam losses, creating quenches and increased radiation levels. This talk will discuss the improvements made to the HERA machine protection system to make sure that the beam is dumped in time in case of these events.  
FRAP03 Summary of Working Group C+G (Part I) 365
 
  • N. V. Mokhov
    Fermilab, Batavia, Illinois
  • K. Hasegawa
    JAEA, Ibaraki-ken
  • S. Henderson
    ORNL, Oak Ridge, Tennessee
  • R. Schmidt
    CERN, Geneva
  • M. Tomizawa
    KEK, Ibaraki
  • K. Wittenburg
    DESY, Hamburg