Sideband instabilities in free electron lasers

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859489· OSTI ID:6813612

Rosenbluth, M N; Vernon Wong, H; Moore, B N ^[1]

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1. Institute for Fusion Studies, The University of Texas at Austin, Austin, TX (USA)

The linear stability of sideband modes for a one-dimensional free electron laser is investigated in detail. The dependence on wiggler taper, slippage between optical pulse and electrons, and trapped electron distribution functions are included in the analysis. Nyquist plots are used to delineate the parameter space in which sideband instabilities occur and approximate analytic expressions for the linear growth rate are derived. In special cases a complete analytic solution is given. Essentially all equilibria are unstable to sideband growth. The linear growth rates agree well with numerical simulations.

• DOE Contract Number: FG05-80ET53088
• OSTI ID: 6813612
• Journal Information: Physics of Fluids B; (USA), Journal Name: Physics of Fluids B; (USA) Vol. 2:7; ISSN PFBPE; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
ANALYTICAL SOLUTION
CORRELATIONS
DIAGRAMS
DISTRIBUTION FUNCTIONS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUATIONS
EQUIPMENT
FREE ELECTRON LASERS
FUNCTIONS
INSTABILITY
INSTABILITY GROWTH RATES
LASERS
MAGNETS
NYQUIST DIAGRAMS
ONE-DIMENSIONAL CALCULATIONS
OSCILLATION MODES
WIGGLER MAGNETS