Fermilab collider upgrade: recent results and plans

The Fermilab collider program has entered its first physics run with two major detectors, CDF and D0. Recent results on the performance of the accelerators are presented, along with plans to improve the luminosity of the collider. The peak luminosity routinely exceeds the goal of 5×10³⁰ cm^-2 sec^-1, and the integrated luminosity routinely exceeds 1 pb^-1 per week to each detector. The Tevatron has been successfully upgraded to include electrostatic separators which provide helical orbits which overcome the beam-beam tune shift limitations of previous runs by only allowing bunch crossings at the two detectors. The installation of two matched low beta inserts in the Tevatron has allowed for the simultaneous operation of two high luminosity interaction regions. The antiproton source has increased its performance over the previous run as measured by stack size and stacking rate. The linac will be upgraded from 200 MeV to 400 MeV in order to lessen the space charge tune shift upon injection into the booster. Additional improvements to the antiproton source are required to meet the luminosity projections, Higher luminosity requires more bunches in the Tevatron in order to keep the number of interactions per bunch crossing acceptably small. The present plan is to increase the number of bunches from 6 to 36 per beam. Until it is replaced with the main injector, the main ring will remain as the most significant bottleneck on the performance of the collider