Free electron laser in a stripline geometry

A thin dielectric slab over a conducting sheet is presented as a low-loss slow-wave guiding system. When one introduces a magnetic wiggler into the system one may efficiently excite millimeter waves by passing a sheet electron beam just above the dielectric surface. For realistic parameters, the energy requirements on the beam are greatly reduced due to the wiggler. The frequency omega /sub 1/ and the growth rate G are very sensitive to beam energy. G scales as I/sub b//sup 1/3/B/sup 2/3/ with beam current I/sub b/ and wiggler strength B/sub 0/, and decreases with increasing width of the dielectric and increasing omega /sub 1/.<
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