OBSERVATION OF STRONG - STRONG AND OTHER BEAM - BEAM EFFECTS IN RHIC.
RHIC is currently the only hadron collider in which strong-strong beam-beam effects can be seen. For the first time, coherent beam-beam modes were observed in a bunched beam hadron collider. Other beam-beam effects in RHIC were observed in operation and in dedicated experiments with gold ions, deuterons and protons. Observations include measurements of beam-beam induced tune shifts, lifetime and emittance growth measurements with and without beam-beam interaction, and background rates as a function of tunes. During ramps unequal radio frequencies in the two rings cause the crossing points to move longitudinally. Thus bunches experience beam-beam interactions only in intervals and the tunes are modulated. In this article we summarize the most important beam-beam observations made so far.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (US)
- Sponsoring Organization:
- DOE/SC (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 15006662
- Report Number(s):
- BNL-69578-CP; R&D Project: AD003; KB0202011; TRN: US0400968
- Resource Relation:
- Conference: 2003 PARTICLE ACCELERATOR CONFERENCE, PORTLAND, OR (US), 05/12/2003--05/16/2003; Other Information: PBD: 12 May 2003
- Country of Publication:
- United States
- Language:
- English
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