MATCHING SECTION AND INFLECTOR DESIGN FOR A MODEL ELECTRON RING

A small electron ring is being designed at the University of Maryland for studies of space-charge-dominated beams in rapid-cycling rings and recirculating accelerator systems. The motivation and general feature s of the ring are given in an accompanying paper. In this paper we des cribe the electron gun, matching section and pulsed inflector. One sol enoid and five quadrupoles will be used for the matching section. This section will also serve as an experimental test bed for the printed-c ircuit quadrupoles and, in part, the lattice design. Our preliminary d esign for the injector system is based on pulsed, single-turn injectio n of the full beam current located at one of 36 ring dipoles. A pulsed , Panofsky quadrupole replaces one of the ring quadrupoles to accomoda te the injection line. The low energy and small fields enable reasonab le voltage and current for these iron-free components, but require car eful compensation for external fields, including the earth's field.