Abstract:

After a rough start-up of the Collider Run II, the Tevatron peak luminosity steadily increased and reached the level of 1.0x10^32 cm^{-2}s^{-1} which exceeds the original Run IIa goal. Over 0.67 fb^{-1} have been delivered to each CDF and D0 experiment since March 2001. In parallel with the Collider operation, we have started a project of luminosity upgrade which should lead to peak luminosities of about 2.7x10^{32} cm^{-2}s^{-1} and total integrated luminosity of 4.1-8.2 fb^{-1} through FY2009. In this talk the Tevatron Collider complex performance, as well as the essence of the upgrades, will be presented.