Antiproton Source – Debunching and Cooling
Particles enter with a narrow time spread and broad energy spread.
High (low) energy pbars take more (less)  to go around…
…and the RF is phased so they are decelerated (accelerated),
Debunching
resulting in a narrow energy spread and broad time spread.
Cooling
Pickups detect deviations from an ideal orbit, which are used to “kick” the orbit back to the nominal.  This reduces the transverse emittance in a statistical way.
The anti-proton source can typically “stack” at about 7E10 pbars/h, up to a maximum of about 120E10, at which point anti-protons are transferred to the Tevatron (via the M.I.).