Principles of gyrotron powered electromagnetic wigglers for free-electron lasers

Journal Article · Thu Jan 01 00:00:00 EST 1987 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/JQE.1987.1073205· OSTI ID:6808928

Danly, B G; Bekefi, G; Davidson, R C; Temkin, R J; Tran, T M; Wurtele, J S

The operation of free-electron lasers (FEL's) with axial electron beams and high-power electromagnetic wiggler fields such as those produced by high-power gyrotrons is discussed. The use of short wavelength electromagnetic wigglers in waveguides and resonant cavities can significantly reduce required electron beam voltages, resulting in compact FEL's. Gain calculations in the low- and high-gain Compton regime are presented, including the effects of emittance, transverse wiggler gradient, and electron temperature. Optimized scaling laws for the FEL gain and the required electromagnetic wiggler field power are discussed. Several possible configurations for FEL's with electromagnetic wigglers powered by millimeter wavelength gyrotrons are presented. Gyrotron powered wigglers appear promising for operation of compact FEL's in the infrared regime using moderate energy (<10 MeV) electron beams.

• Research Organization: Plasma Fusion Center and the Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
• OSTI ID: 6808928
• Journal Information: IEEE J. Quant. Electron.; (United States), Vol. QE23:1
• Country of Publication: United States
• Language: English

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42 ENGINEERING
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OPERATION
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ELECTRON BEAMS
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420300* - Engineering- Lasers- (-1989)