Recent Beam-Beam Effects at VEPP-2000 and VEPP-4M
  Budker INP hosts two e+e- colliders, VEPP-4M operating in the beam energy range of 1-5.5 GeV and the low-energy machine VEPP-2000, collecting data at 160-1000 MeV per beam. The latter uses a novel concept of round colliding beams. The paper presents an overview of observed beam-beam effects and obtained luminosities. 
Dmitry Shwartz, Dmitry Berkaev, Ivan Koop, Evgeny Levichev, Evgeny   Perevedentsev, Yury Rogovsky, Alexander Romanov, Dmitry...
physics.acc-ph