• C. Milardi, D. Alesini, M.E. Biagini, C. Biscari, A. Bocci, R. Boni, M. Boscolo, F. Bossi, B. Buonomo, A. Clozza, G.O. Delle Monache, T. Demma, E. Di Pasquale, G. Di Pirro, A. Drago, A. Gallo, A. Ghigo, S. Guiducci, C. Ligi, F. Marcellini, G. Mazzitelli, F. Murtas, L. Pellegrino, M.A. Preger, L. Quintieri, P. Raimondi, R. Ricci, U. Rotundo, C. Sanelli, M. Serio, F. Sgamma, B. Spataro, A. Stecchi, A. Stella, S. Tomassini, C. Vaccarezza, M. Zobov
  INFN/LNF, Frascati (Roma)
• N. Arnaud, D. Breton, L. Burmistrov, A. Stocchi, A. Variola, B.F. Viaud
  LAL, Orsay
• S. Bettoni
  CERN, Geneva
• P. Branchini
  roma3, Rome
• M. Esposito
  Rome University La Sapienza, Roma
• E.B. Levichev, P.A. Piminov, D.N. Shatilov
  BINP SB RAS, Novosibirsk
• K. Ohmi
  KEK, Ibaraki
• V.V. Smaluk
  BINP, Novosibirsk
• D. Teytelman
  SLAC, Menlo Park, California
• P. Valente
  INFN-Roma, Roma

In 2007 DAΦNE was upgraded to operate in a regime of large Piwinski angle, with a novel IR optics, reduced vertical beta at the interaction point, and additional sextupoles providing for crab waist collisions. The specific luminosity was boosted by more than a factor of four, and the peak luminosity was more than doubled with respect to the maximum value obtained with the original collider configuration. The DAΦNE commissioning as well as the first experience with large Piwinski angle and crab waist collisions scheme will be reported.

Slides

• P.A. Piminov, E.B. Levichev, D.N. Shatilov
  BINP SB RAS, Novosibirsk
• C. Milardi, M. Zobov
  INFN/LNF, Frascati (Roma)
• K. Ohmi
  KEK, Ibaraki

A novel scheme of crab waist collisions has been successfully tested at the electron-positron collider DAΦNE, Italian Phi-factory. In this paper we compare numerical simulations of the crab waist beam-beam interaction with obtained experimental results. For this purpose we perform weak-strong and quasi strong-strong beam-beam simulations using a realistic DAΦNE lattice model that has proven to reproduce reliably both linear and nonlinear collider optics.