Speaker
Description
Free-electron lasers in the terahertz region that produce high peak and average power require small diameter, low-emittance, high voltage electron beams. This paper presents a 1.5-2 MV, 100-200 A thermionic cathode e-beam source for compact megawatt range peak power, multi-kilowatt average power, high repetition rate THz FELs. The beam generation system includes a high-quality Pierce gun followed by a four-stage acceleration section followed by a magnetic beam compression lens. A specific design for a 1.0 THz FEL is presented. The injector possesses various power supply switching advantages and the paper also includes remarks on very high-voltage multi-stage depressed collectors for overall efficiency enhancement. Performance estimates are included throughout the paper.
Funding Agency
Absolutely no outside funding whatsoever was used in the creation of this report
