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Title: $PROSPECTS FORTUNES NEARTHEINTEGERATTHE FERMILA4B PBAR-P COLLIDER
Abstract: A series of experiments with the Tevatron Collider has been made which has as a goal the operation of the machine with betatron tunes near 19.05. Experiments near the integer working point are described, including closed orbit control, and emittance growth due to power supply noise. Results from a pbar-p store with large pbar tune shifts and tunes near the integer are described. History The beam-beam interaction in a collider causes the working point to be smeared over some region of tune space. This tune spread is a particular problem when the tunes overlap resonances. The non-linear part of the beam-beam force also drives these resonances leading to emittance growth and shortened luminosity lifetime. One effective solution to this situation has been to use electrostatic separators to reduce the number of crossing points and thus the magnitude of the tune shift and spread. An additional technique is to find the area in tune space with the most space free of lower order resonances. An examination of the tune diagram quickly shows that the largest resonance free area is near the integer stopbands.