Reduction of beta* and increase of luminosity at RHIC
The reduction of {beta}* 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 {beta}*, 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.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 952557
- Report Number(s):
- BNL-81845-2009-CP; KB0202011; TRN: US0902544
- Resource Relation:
- Conference: Particle Accelerator Conference; Vancouver, B.C., Canada; 20090504 through 20090508
- Country of Publication:
- United States
- Language:
- English
Similar Records
LUMINOSITY INCREASES IN GOLD-GOLD OPERATION IN RHIC.
A luminosity model of RHIC gold runs