  The PEP-II B Factory at SLAC has been in operation with the BABAR detector
since the summer of 1999. The peak currents and luminosity steadily increased
through the end of the 2000 run on October 31. By that time, 0.75 A of
electrons (the design current) routinely collided with 1.4 A of positrons in
657 bunches, to give a peak luminosity of 2.6E33 cm^{-2} s^{-1}. We delivered
an integrated luminosity of up to 184/pb per day and 1033 per week; BABAR
logged a total of 25/fb. Three days of machine development at the end of the
run raised the peak luminosity to 3.29E33, exceeding the design goal of 3.0.
BABAR then logged data for an hour, starting with a peak of 3.20. Next, we
achieved the design value for positron current, 2.14 A, operating without
collisions. The major limitation has been growth in the size of the positron
beam in the low-energy ring (LER) due to electron clouds and multipacting.
Since the arcs benefit from antechambers and a TiN coating with low secondary
emission, our efforts have concentrated on the straights, where we added
solenoid windings. Each straight wound allowed higher LER current without
blow-up, and a consequent increase in luminosity. Measurements of the
bunch-by-bunch luminosity showed that the effect becomes significant by about
the tenth bunch in a train, but clears after a short gap. Careful control of
the fill pattern has thus been essential in raising luminosity. For the 2001
run, which began in February, we added a third LER RF station, to collide with
more LER current and more bunches, and also tried reducing beta_x* from 50 to
35 cm, with the goal of reaching a luminosity of 5E33 by year's end. In 2003,
we plan to add a fourth LER and sixth HER RF station to reach 1E34.
