Antiproton production and accumulation for a 20-TeV anti pp collider

Stochastic cooling is capable of providing a flux of 3.108 anti p/second, adequate to fill a 20 TeV collider in 12 hours for operation at luminosity L = 1032 cm-2 s-1. This represents an order of magnitude improvement over the FNAL-source design goal. It is made possible mainly due to higher bandwidth (4 GHz vs 1 GHz) and a lower psi/sub max//psi/sub max/ ratio (350 vs 104). Systems operating in the 4 to 8 GHz band are necessary, a technology which goes beyond the 2 to 4 GHz systems presently under development, but appears within reach with a moderate R and D effort. Stochastic cooling in the 8 to 16 GHz range holds the promise of small transverse emittance (less than or equal to 1 μm normalized), allowing even shorter filling times or the use of lower field, larger circumference colliders, should such devices prove more cost-effective