Electron-cooling scenarios at Fermilab

According to Run II upgrade plans, peak luminosity of the proton–antiproton beams in the Tevatron has to increase 7–8 times in coming years. This requires 5–6 times more antiprotons, which is supposed to be reached by means of electron cooling of accumulated pbars. A main scenario is to apply this in the Recycler (RR). However, there is an alternative, i.e to e-cool pbars in the accumulator, without using RR at all. Advantages and disadvantages of both scenarios are discussed.