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The theory of cohe.·C'ent transverse oscillations of u;"e) particle species is extended to include strong species-species and linage forces.It is ShOWl that in g~neral the species-speci.es force can conside:C3.bly alter the instability threshold. Conversely, it is shC>·~Tn that the limit on the perfor:J!e,~ce of an cJ.2ctron ring accelerator im'po~ed by the re~uireQent of stable ion electron oscillations, is not sigaificantly Yicr~sup:r:)ytc:2 by the U.S . .L;tor:.ic EC2r w CC':tG:~L:sion.

A simplified scheme for the provision of antiprotons at 100 MeV/c based on fast extraction is described. The scheme uses the existing p production target area and the modified Antiproton Collector Ring in their current location. The physics programme is largely based on capturing and storing antiprotons in Penning traps for the production and spectroscopy of antihydrogen. The machine modifications necessary to deliver batches of 1 u 10 7 p /min at 100 MeV/c are described. Details of the machine layout and the experimental area in the existing AAC Hall are given.

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