Abstract: Even at the conceptual level, the strong couplingbetween the laser subsystem elements, such as theaccelerator, wiggler, optics, and control, greatlycomplicates the understanding and design of afree-electron laser (FEL). Given the requirements for ahigh-performance FEL, the coupling between the lasersubsystems must be included in the design approach. Toaddress the subsystem coupling, we implemented theconcept of an integrated numerical experiment (INEX).Unique features of the INEX approach are consistencyand numerical equivalence of experimental diagnostics.The equivalent numerical diagnostics mitigate the majorproblem of misinterpretation that often occurs whentheoretical and experimental data are compared. Acomplete INEX model has been applied to the 10-$mu@mhigh-extraction-efficiency experiment at Los Alamos andthe 0.6-$mu@m Burst Mode experiment at BoeingAerospace. In addition, the agreement between INEX andthe experiments is very good. With the INEX approach,it now appears possible to design high-performance FELsfor numerous applications. The first full-scale test ofthe INEX approach is the Los Alamos High-BrightnessAccelerator FEL (HIBAF) experiment. Implementation andexperimental validation of the INEX concept arediscussed.!28
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