Prebunched high-harmonic FEL for short-pulse millimeter wave emission

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · IEEE Transactions on Plasma Science

DOI:https://doi.org/10.1109/27.533083· OSTI ID:377840

McDermott, D B; Hartemann, F V; Balkcum, A J; Luhmann, Jr, N C ^[1]

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1. Univ. of California, Davis, CA (United States). Dept. of Applied Science

A novel wide-band millimeter-wave source is described where a point-charge electron beam rotating within a bifilar wiggler will generate a short-pulse TE{sub mn} wavepacket at the mth-harmonic of the fundamental free electron laser (FEL) frequency. In this first-order interaction, all electrons lose energy to the wave if the electron bunch size is much less than the wavelength. For a grazing intersection of the beam mode with the waveguide mode, there is no slippage of the electron bunch in the wave and the narrow width of the broad-band output pulse is limited only by the waveguide`s dispersion. A linear theory of this new interaction is presented along with the design for a prebunched tenth-harmonic FEL proof-of-principle experiment that is predicted to generate a 140-ps pulsewidth 30-GHz wavepacket at kilowatt power levels.

• OSTI ID: 377840
• Journal Information: IEEE Transactions on Plasma Science, Journal Name: IEEE Transactions on Plasma Science Journal Issue: 3 Vol. 24; ISSN ITPSBD; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BEAM BUNCHING
DESIGN
ELECTROMAGNETIC PULSES
FREE ELECTRON LASERS
HARMONICS
MATHEMATICAL MODELS
WIGGLER MAGNETS