Open AccessStudy of the beam-beam limit in e+e- circular colliders
Author(s) -
K. Ohmi,
M. Tawada,
Yunhai Cai,
S. Kamada,
K. Oide,
Ji Qiang
Publication year - 2004
Language(s) - English
Resource type - Reports
DOI - 10.2172/826860
Subject(s) - beam (structure) , luminosity , physics , limit (mathematics) , m squared , beam diameter , optics , computational physics , astrophysics , laser beams , mathematics , laser , mathematical analysis , galaxy
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