• R.J. Pasquinelli, B.E. Drendel, K. E. Gollwitzer, S.R. Johnson, V.A. Lebedev, A.F. Leveling, J.P. Morgan, V.P. Nagaslaev, D.W. Peterson, A.D. Sondgeroth, S.J. Werkema
  Fermilab, Batavia

Run II has been ongoing since 2001. Peak luminosities in the Tevatron have increased from approximately 10×10³⁰ cm^-2ses^-1 to 300×10³⁰ cm^-2ses^-1 – a factor of 30 improvement. A significant contributing factor in this remarkable progress is a greatly improved antiproton production capability. Since the beginning of Run II, the average antiproton accumulation rate has increased from 2×10¹⁰ p/hr to about 24×10¹⁰ p/hr. Peak antiproton stacking rates presently exceed 25×10¹⁰ p/hr. The antiproton stacking rate has nearly doubled in the last two years alone. A variety of improvements have contributed to the recent progress in antiproton production. The process of transferring antiprotons to the Recycler Ring for subsequent transfer to the collider has been significantly restructured and streamlined, allowing more time to be utilized for antiproton production. Improvements to the target station have greatly increased the antiproton yield from the production target. The performance of the Antiproton Source stochastic cooling systems has been enhanced by improvements to the cooling electronics, accelerator lattice optimization, and improved operating procedures.