Abstract
The concept and basic theory of a new fixed-frequency, fixed-field, high- energy accelerator embodying the principle of strong-focusing and capable of accelerating protons to energies in the Bev region is described. The magnetic field is designed with the turns of the equilibrium orbit' separated axially as well as radially, as in a spiral-helix, so as to avoid the resonances associated with alternatinggradient systems. The focusing properties can be changed discontinuously at chosen points along the orbit to avoid the error resonances. Longitudinal stability is present, as the system is phase stable. Ions spiral repeatedly through several accelerating cavities operated in the TE mode and spaced regularly around the machine. Each cavity extends both radially and axially to intercept all turns only once. Injection and extraction are straight- forward and the final energy can be varied by extracting at chosen points along the orbit path. A preliminary design for a 1-Bev machine is described, and a comparison is made between the proposed machine and some contemporary types of accelerators. The cost estimate compares favorably with that of otuer machines with which it is compared. (auth)
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