Study of the beam-beam limit in e{sup +}e{sup -} circular colliders

Conference · Fri Apr 02 04:00:00 EST 2004

DOI:https://doi.org/10.2172/826860· OSTI ID:827962

Ohmi, K ^[1]; Tawada, M; Cai, Y; Kamada, S; Oide, K; Qiang, J

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1. LBNL Library

Beam-beam effects limit the luminosity of circular colliders. Once the bunch population exceeds a threshold, the luminosity increases at a slower rate. This phenomenon is called the beam-beam limit. Onset of the beam-beam limit has been analyzed with various simulation methods based on the weak-strong and strong-strong models. We have observed that an incoherent phenomenon is mainly concerned in the beam-beam limit. The simulation have shown that equilibrium distributions of the two colliding beams are distorted from Gaussians when the luminosity is limited. The beam-beam limit is estimated to be (xi) {approx} 0.1 for a B factory with damping time of several thousand turns.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Office of High Energy Physics, Department of Energy Contract DE-AC03-76SF00515; Japan-US collaboration plan, KEK computing center (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 827962
• Report Number(s): LBNL--55556
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM-BEAM LIMIT ELECTRON CIRCULAR COLLIDERS LUMINOSITY LIMIT B FACTORY
COLLIDING BEAMS
DAMPING
LUMINOSITY
SIMULATION