The adiabatic matching section solution for the source injector

Typical designs for a Heavy Ion Fusion Power Plant require the source injec tor to deliver 100 beams, packed into an array with a spacing of 7 cm. When designing source injectors using a single large aperture source for each b eam, the emitter surfaces are packed into an array with a spacing of 30 cm. Thus, the matching section of the source injector must not only prepare th e beam for transport in a FODO lattice, but also funnel the beams together. This can be accomplished by an ESQ matching section in which each beam tra vels on average at a slight angle to the axis of the quadrupoles and uses t he focussing effect of the FODO lattice to maintain the angle. At the end o f the matching section, doublet steering is used to bring the beams paralle l to each other for injection into the main accelerator. A specific solutio n of this type for an 84-beam source injector is presented. (C) 2001 Elsevi er Science B,V. All rights reserved.