Parametric effect of a spatially periodic voltage depression on operation of [hacek C]erenkov sources of electromagnetic radiation

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870769· OSTI ID:6691804

Nusinovich, G S; Vlasov, A N ^[1]

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1. Institute for Plasma Research, University of Maryland, College Park, Maryland 20742 (United States)

In microwave sources of coherent [hacek C]erenkov radiation the electrons usually propagate near the rippled wall of a slow-wave structure. These ripples cause the periodic modulation of electron potential depression, and therefore, lead to periodic modulation of electron axial velocities. Since the period of this electrostatic pumping is the period of the slow-wave structure the parametric coupling of electrons to originally nonsynchronous spatial harmonics of the microwave field may occur. This effect can be especially important for backward-wave oscillators (BWO's) driven by high current, relativistic electron beams. In the paper both linear and nonlinear theories of the relativistic resonant BWO with periodic modulation of electron axial velocities are developed and results illustrating the evolution of the linear gain function and the efficiency of operation in the large-signal regime are presented.

• OSTI ID: 6691804
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
BEAMS
CHERENKOV RADIATION
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
ENERGY RANGE
EQUIPMENT
LEPTON BEAMS
MICROWAVE EQUIPMENT
MICROWAVE RADIATION
MICROWAVE TUBES
MODULATION
PARTICLE BEAMS
RADIATIONS
RELATIVISTIC RANGE
WALL EFFECTS
WAVEGUIDES