LOW-VOLTAGE INFRARED FREE-ELECTRON LASERS BASED ON GYROTRON-POWERED RF WIGGLERS

Designs are presented for infrared free-electron lasers (FEL's) with g yrotron-powered electromagnetic wigglers and relatively low voltage el ectron beams, The use of an electromagnetic wiggler formed by a quasi- optical gyrotron, where the radiation is coupled into a corrugated wav eguide, has the potential for substantial increases of FEL gain compar ed to an open mirror system, Designs for proof-of-principle low-voltag e infrared FEL experiments based on both radio-frequency (RF) linear a ccelerator and electrostatic accelerator technology are presented toge ther with point designs for portable systems covering the infrared win dows in the atmosphere.