This seemed technically sound but would be expensive, and involved as many as 20 recirculations to minimize this cost. It emerged at the workshop that these multi-turn recirculating accelerators could be replaced by fast cycling synchrotrons. This represents a major cost reduction in the components that previously seemed likely to dominate the total cost. Bud Good proposed such rotating magnets many years ago, but there was at that time no compelling reason for it. Collider Ring Studies have shown that the requirement of a nearly isochronous lattice can be met without difficulty.
Problems remain, however, in obtaining a design for the low beta insertion.
Studies of instability problems were reported, but no final conclusions were reached. Pair production at the intersecting point was shown to be large, but the consequences of this remain to be determined. There remain inconsistencies between different pion production codes and between these and the data. There is a lack of data in just that region of production that we would be using. There are serious questions about the technology and cost of the phase rotation and cooling linacs.