A kinetic theory for electron cyclotron maser interaction in a waveguide: Coupling between a transverse electric mode and a transverse magnetic mode
- Department of Electrical Engineering and Computer Science, University of Illinois-Chicago, Chicago, IL (USA)
- Center for Plasma Theory and Computation, University of Wisconsin-Madison, Madison, WI (USA)
A kinetic treatment valid at all harmonic cyclotron frequencies is presented for the electron cyclotron maser interaction between a tenuous annular relativistic electron beam and the transverse electric, TE{sub 0{ital n}}, mode in a cylindrical waveguide. Including all equilibrium guiding center trajectory function effects, an improved dispersion relation valid near and far from resonance is obtained. Adding the transverse magnetic, TM{sub 0{ital s}}, mode, the derived dispersion relation reveals that coupling between the two waveguide modes may be significant. Parameter regimes indicating when coupling may be significant are identified. For weakly relativistic and relativistic beams, a wide range of parameters exists when the operating frequency is near the cutoff of either mode. When far from cutoff, similar conclusions are made. A new, direct transfer mechanism between two empty waveguide modes in the presence of the beam is established. Under appropriate conditions, it is explicitly shown that the inclusion of the TM{sub 0{ital n}} mode can enhance or inhibit the growth rate.
- OSTI ID:
- 6329699
- Journal Information:
- Physics of Fluids B; (USA), Journal Name: Physics of Fluids B; (USA) Vol. 2:11; ISSN 0899-8221; ISSN PFBPE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
426002* -- Engineering-- Lasers & Masers-- (1990-)
AMPLIFIERS
ANNULAR SPACE
BEAMS
CONFIGURATION
COUPLING
CYCLOTRON HARMONICS
DISPERSION RELATIONS
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
ENERGY RANGE
EQUATIONS
EQUILIBRIUM
EQUIPMENT
GUIDING-CENTER APPROXIMATION
HARMONICS
KINETIC EQUATIONS
LEPTON BEAMS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OSCILLATIONS
PARTICLE BEAMS
RELATIVISTIC RANGE
SPACE
TRAJECTORIES
WAVEGUIDES