Intense microwave generation by the negative-mass instability

Journal Article · Wed Feb 01 04:00:00 EST 1978 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.324685· OSTI ID:5198701

Uhm, H; Davidson, R C

This paper examines the negative-mass stability properties of an E layer for transverse electric (TE) and transverse magnetic (TM) waveguide modes in a conducting cylinder. The analysis is carried out for a relativistic non-neutral E layer aligned parallel to a uniform axial magnetic field B/sub 0/e/sub z/, within the context of the assumptions that the electron motion is ultrarelativistic (..gamma../sub 0/>>1) and that (..nu../..gamma../sub 0/)/sup 1/3/very-much-less-than1, where ..nu.. is Budker's parameter and ..gamma../sub 0/mc/sup 2/ is the electron energy. One of the most important features of the analysis is that the axial energy spread can have a large influence on the stability behavior for both the TE and TM waveguide modes. By an appropriate choice of system parameters, it is shown that the spectrum of microwave radiation generated by the negative-mass instability can be very narrowband.

• Research Organization: Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742
• OSTI ID: 5198701
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 49:2; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
BEAM-PLASMA SYSTEMS
BEAMS
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ENERGY RANGE
ENERGY SPECTRA
INSTABILITY
LEPTON BEAMS
MICROWAVE RADIATION
NEGATIVE MASS INSTABILITY
PARTICLE BEAMS
PLASMA
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
RADIATIONS
RELATIVISTIC PLASMA
RELATIVISTIC RANGE
SPECTRA
WAVE PROPAGATION
WAVEGUIDES