- 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
- et al.
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.