B factory with a finite crossing angle
The R D working group for the design of a B factory in the ISR tunnel has defined the characteristics of a very high luminosity machine based on a geometric separation of the beams at the interaction point (IP). Such a machine has the ISR configuration, namely two rings crossing horizontally. Each beam is made of many bunches with a relatively small number of particles power bunch and is flat at the IP. The orbits being straight in the interaction region, the synchrotron light background is maintained at a low level. In order to avoid synchro-betatron excitation through the beam-beam interaction and to preserve the luminosity, the bunches are rotated horizontally upstream to the IP and re-aligned after the crossing using two deflecting rf cavities per ring ({ital crab} {ital crossing} scheme); this way, the bunches fully overlap when they collide. The commisonning of the machine would begin with symmetric energies where the beam-beam effect is known and be progressively extended to asymmetric energies, a regime for which no experience exists yet.
- OSTI ID:
- 5870894
- Report Number(s):
- CONF-9002118--
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (USA), Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Vol. 214:1; ISSN 0094-243X; ISSN APCPC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
430400* -- Particle Accelerators-- Storage Rings
B MESONS
BOSONS
CAVITY RESONATORS
CERN ISR
DATA
DESIGN
ELECTRON-POSITRON INTERACTIONS
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
EQUIPMENT
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MESONS
NUMERICAL DATA
PARAMETRIC ANALYSIS
PARTICLE INTERACTIONS
PSEUDOSCALAR MESONS
RESONATORS
STORAGE RINGS