Reduction of beta* and increase of luminosity at RHIC [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Additional Creators:
- Brookhaven National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- The reduction of β* beyond the 1m design value at RHIC has been consistently achieved over the last 6 years of RHIC operations, resulting in an increase of luminosity for different running modes and species. During the recent 2007-08 deuteron-gold run the reduction to 0.70 from the design 1m achieved a 30% increase in delivered luminosity. The key ingredients allowing the reduction have been the capability of efficiently developing ramps with tune and coupling feedback, orbit corrections on the ramp, and collimation, to minimize beam losses in the final focus triplets, the main aperture limitations for the collision optics. We will describe the operational strategy used to reduce the β*, at first squeezing the beam at store, to test feasibility, followed by the operationally preferred option of squeezing the beam during acceleration, and the resulting luminosity increase. We will conclude with future plans for the beta squeeze.
- Published through SciTech Connect.
Particle Accelerator Conference; Vancouver, B.C., Canada; 20090504 through 20090508.
Cameron, P.; Bruno, D.; Bai, M.; Litvinenko, V.; Marr, G.; Luo, Y.; Trbojevic, D.; Ptitsyn, V.; Drees, A.; Pilat,F.; Satogata, T.; Tepikian, S.; Malitsky, N.; Della Penna, A.
- Funding Information:
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