RESEARCH AND DEVELOPMENT OF A NEW VERSION OF THE FREE ELECTRON LASER TWO-BEAM ACCELERATOR

THIS RESEARCH INVESTIGATES THE FEASIBILITY OF A NEW VERSION OF AN INDUCTION LINAC-DRIVEN FREE-ELECTRON LASER (FEL) AS A SOURCE OF HIGH MICROWAVE POWER FOR A 17 GHZ, HIGH GRADIENT (150 MV/M) LINEAR ACCELERATOR. IN PHASE I THEORETICAL DESIGN STUDIES WILL BE PERFORMED TO ANALYZE THE POWER TRANSPORT EFFICIENCY AND BEAM STABILITY ISSUES RELATED TO THE NEW CONCEPT OF MICROWAVE POWER EXTRACTION FROM THE FEL. NUMERICAL SIMULATIONS WILL BE PERFORMED ON THE MAIN FEL WAVEGUIDE, THE REFLECTOR, AND THE POWER SEPARATOR/DIVIDER TOSTUDY THE ELECTROMAGNETIC CHARACTERISTICS OF THESE STRUCTURES. METHODS TO MINIMIZE SURFACE ELECTRIC FIELDS AS WELL AS EFFECTS OF MODE CONVERSIONS AT DISCONTINUITIES WILL BE INVESTIGATED. THERMAL EFFECTS AND STRUCTURAL RESPONSES CAUSED BY HIGH POWER PULSE LOADING WILL BE CALCULATED. PRELIMINARY STUDIES ALSO WILL BE MADE ON OPTIMUM DESIGNS OF THE DEFLECTING MAGNETS TO PRESERVE TRANSVERSE AND LONGITUDINAL BEAM EMITTANCES IN THE FEL INTERACTION REGION.