- Cai, Y;
- Clendenin, J;
- Decker, FJ;
- Donald, M;
- Ecklund, S;
- Erickson, R;
- Fisher, A;
- Heifets, S;
- Holtzapple, R;
- Iverson, R;
- Krejcik, P;
- Kulikov, A;
- Nelson, J;
- Novokhatski, A;
- Reichel, I;
- Seeman, JT;
- Stanek, M;
- Sullivan, M;
- Turner, J;
- Wienands, U;
- Steier, C;
- Zisman, M;
- Biagini, M;
- Kozanecki, W
The PEP-II e+e-collider has been operating for two years with the BaBar detector at the energy of the Upsilon 4S resonance. The peak luminosity has reached 3.3 ×1033/cm2/s with 693 bunches with a positron current of 1.5 A and an electron current of 0.8 A. PEP-II has delivered in excess of 38 fb-1 of data to BaBar. The beam-beam tune shift limits are approaching 0.05-0.07 horizontally and 0.03-0.05 vertically. The electron cloud instability ECI enlarges the positron beam size at high currents but is reduced by a solenoidal field on the vacuum chambers. The beam currents in PEP-II are being raised to increase the number of bunches and the luminosity. Over the next few years the luminosity goal for PEP-II is 1034/cm2/s.