TUXMH  —  Circular Colliders   (25-May-10   08:30—10:30)

Chair: A.N. Skrinsky, BINP SB RAS, Novosibirsk

Paper Title Page
TUXMH01 RHIC Luminosity Upgrade Program 1227
 
  • W. Fischer
    BNL, Upton, Long Island, New York
 
 

The Relativistic Heavy Ion Collider (RHIC) operates with either ions or polarized protons. After increasing the heavy ion luminosity by two orders of magnitude since its commissioning in 2000, the current luminosity upgrade program aims for an increase by another factor of 4 by means of 3D stochastic cooling and a new 56 MHz SRF system. An Electron Beam Ion Source is being commissioned that will allow the use of uranium beams. Electron cooling is considered for collider operation below the current injection energy. For the polarized proton operation both luminosity and polarization are important. In addition to ongoing improvements in the AGS injector, the development of a new high-intensity polarized source has started. In RHIC a number of upgrades are under way to increase the intensity and polarization transmission to 250 GeV beam energy. Electron lenses will be installed to partially compensate the head-on beam-beam effect.

 

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Slides

 
TUXMH02 LHC Optics Model Measurements and Corrections 1232
 
  • R. Tomás, O.S. Brüning, M. Giovannozzi, M. Lamont, F. Schmidt, G. Vanbavinckhove
    CERN, Geneva
  • M. Aiba
    PSI, Villigen
  • R. Calaga, R. Miyamoto
    BNL, Upton, Long Island, New York
 
 

Optics stability during all phases of operation is crucial for the LHC. The optical properties of the machine have been optimized based on a detailed magnetic model of the SC magnets and on their sorting. Tools and procedures have been developed for rapid checks of beta beating, dispersion, and linear coupling, as well as for prompt optics correction. Initial optics errors, correction performance and optics stability from the first LHC run will be reported, and compared with expectations. Possible implications for the collimation cleaning efficiency and LHC machine protection will be discussed.

 

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Slides