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Wang, S.

Paper Title Page
TUA2C06 A Split-Function Lattice for Stochastic Cooling 99
 
  • J. Wei
    BNL, Upton, Long Island, New York
  • S. Wang
    IHEP Beijing, Beijing
  
  Funding: * Work performed under the auspices of the US Department of Energy.

During the EPAC 2006 we reported the lattice design for rapid-cycling synchrotrons used to accelerate high-intensity proton beams to energy of tens of GeV for secondary beam production. After primary beam collision with a target, the secondary beam can be collected, cooled, accelerated or decelerated by ancillary synchrotrons for various applications. For the main synchrotron, the lattice has:

  1. flexible momentum compaction to avoid transition and to facilitate RF gymnastics
  2. long straight sections for low-loss injection, extraction, and high-efficiency collimation
  3. dispersion-free straights to avoid longitudinal-transverse coupling, and
  4. momentum cleaning at locations of large dispersion with missing dipoles.
Then, we present a lattice for a cooler ring for the secondary beam. The momentum compaction across half of this ring is near zero, while for the other half it is normal. Thus, bad mixing is minimized while good mixing is maintained for stochastic beam cooling. 		 
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