Extrapolation of the Isabelle Design to 400 × 400 GeV

Consideration of a national program for the development of new high energy facilities during the next ten years suggests that the most appropriate energy for proton storage rings may be higher than the 200 × 200 GeV of the present ISABELLE design. It has been indicated that 300 × 300 GeV or 400 × 400 GeV may provide a more reasonable step to maximize the scientific potential of the next major proton storage ring facility. A preliminary analysis of the design consequences of changing the ISABELLE energy to 300 × 300 GeV and 400 × 400 GeV is given, keeping the luminosity, maximum field and most of the original design parameters unchanged. It is concluded that the ISABELLE concept can be extrapolated to 400 × 400 GeV without any unmanageable technical problems and that even higher energies seem to be feasible.