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Travish, Gil
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document
DEVELOPMENT OF SOLID FREEFORM FABRICATION (SFF) FOR THE PRODUCTION OF RF PHOTOINJECTORS
Abstract
Electron beam based additive fabrication techniques have been successfully applied to produce a variety of complex, fully dense, metal structures. These methods, collectively known as Solid Freeform Fabrication (SFF) are now being explored for use in radio frequency (RF) structures. SFF technology may make it possible to design and produce near-netshape copper structures for the next generation of very high duty factor, high gradient RF photoinjectors. The SFF process discussed here, Arcam Electron Beam Melting (EBM), utilizes an electron beam to melt metal powder in a layer-by-layer fashion. The additive nature of the SFF process and its ability to produce fully dense parts are explored for the fabrication of internal cooling passages in RF photoinjectors. Following an initial feasibility study of the EBM SFF process, we report on the results of recent material optimization, plans to fabricate a copper photocathode and new designs for a high duty factor photoinjector utilizing SFF technology.