Report of the Storage Ring Design Group

The Storage Ring Design Group set itself the tasks of (1) agreeing on the basic formulas with which one designs (conceptually) a Free Electron Laser (FEL) ring, (2) making three examples employing these formulas, and (3) studying the performance of these rings under the assumption that they have been built and that there are operating parameters that can be varied. The study group made good progress on Task No. 1, and the work is described in Section I. We had time under Task No. 2 to produce only one example and this is described in Section II. The group was unable to attack Task No. 3 in the limited time which we had available. However, the subject is of sufficient interest that the two of us, and C. Pellegrini, intend to go on and do a more extensive job on Task No. 2 and some work on Task No. 3, with the thought that out of this survey will come some generally interesting conceptual designs for FEL rings. Although this group was able to produce only one example, it was a most interesting example. We have shown that a FEL ring designed for 500 Angstroms lasing appears to be within the capabilities of storage ring builders