Future European proton storage ring facilities

The status of the CERN studies on future proton colliding-beam facilities is presented. Proton-proton Large Storage Rings of 400 x 400 $GeV^2$ , using superconducting magnets, are being designed for a luminosity of $10^{33}$ $cm^{-2}$ $s^{-1}$. A 20 GeV electron ring is incorporated into the design to permit e-p collisions at 20 x 400 $GeV^2$ with a luminosity of $10^{32}$ $cm^{-2}$ $s^{-1}$ , using one of the coasting proton beams . Antiproton-proton collisions are feasible , both in the existing 30 GeV ISR and in the future 400 GeV LSR. The performance of these $\bar{p}$-p facilities would be enhanced by the use of the stochastic cooling principle under active study at the ISR.