Progress of the PEP-II B-factory

PEP-II is an e⁺e^- B-factory collider located at SLAC operating at the Upsilon 4S resonance. PEP-II has delivered, over the past five years, an integrated luminosity to the BaBar detector of over 131 fb^-1 and has reached a luminosity of 6.11×10³⁶/cm²/s. Steady progress is being made in reaching higher luminosity. The goal over the next several years is to reach a luminosity of at least 2×10³⁴/cm²/s. The accelerator physics issues being addressed in PEP-II to reach this goal include the electron cloud instability, beam-beam effects, parasitic beam-beam effects, high RF beam loading, shorter bunches, lower betay*, interaction region operation, and coupling control. The present parameters of the PEP-II B-Factory are compared to the design. The present peak luminosity is 204% of design and the best integrated luminosity per month is 7.4 fb^-1 that is 225% of design. The progress in luminosity has come from correcting the orbits, adding specific orbit bumps to correct coupling and dispersion issues, lowering the betay* in the LER, and moving the fractional horizontal tunes in both rings to just above the half integer (<0.52).