A proposal for an FEL experiment, based on a tandem electrostatic accelerator, is presented. The proposed FEL is designed to operate at harmonic frequencies in a quasi-cw mode. An internal wiggler scheme is planned to be used, based upon a strong planar wiggler (aw > 1), positioned in the high voltage terminal of a HVEC model EN tandem accelerator. The electron beam enters the wiggler at the natural injection angle (aw/γ). This approach provides a relatively simple and compact FEL system that will be used as a research tool for studying harmonic operation of FELs and investigating post-saturation laser dynamics and efficiency enhancement. The exceptional electron beam quality and long pulse characteristics of electrostatic accelerators give a special advantage to such an experimental scheme as a means for exploring the ultimate performance parameters of FELs.
|Number of pages||6|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|State||Published - 1 Sep 1987|