Engineering Problems in the Development of Glass Betatron Toroids

JSGT 1956 V40 T520-T541

This paper reviews three different types of toroidal glass vacuum chambers which have been developed for use in betatrons operating at 16 and 20 MeV. General problems of design are dealt with; in particular, the problem of minimum wall thickness in relation to collapse under vacuum loading. Design tests on models and on sections are described. The relative merits of the three alternative methods of construction are discussed. The development of special processes and equipment for the 20 MeV toroid is described, and limits of accuracy are quoted.

S. J. Morrison