Recent beam-beam effects and luminosity at VEPP-2000
Copyright © 2014 CC-BY-3.0 and by the respective authors. VEPP-2000 electron-positron collider dedicated last season to the energy range of 160-520 MeV per beam. The application of round colliding beams concept along with the accurate orbit and lattice correction yielded the high peak luminosity of 1.2·10<sup>31</sup> cm<sup>-2</sup>s<sup>-1</sup> at 500 MeV with average luminosity of 0.9·10<sup>31</sup> cm<sup>2</sup>s<sup>-1</sup> per run. The total beam-beam tune shift up to 0.174 was achieved in the runs at 392.5 MeV. This corresponds to beam-beam parameter ζ= 0.125 per one interaction point. The injection system is currently being upgraded  to allow for the injection at the top energy of VEPP-2000 collider and to eliminate the present lack of positrons.