Whistler wave emission by a modulated electron beam

1994 ◽  
Vol 72 (5) ◽  
pp. 649-652 ◽  
Author(s):  
C. Krafft ◽  
P. Thévenet ◽  
G. Matthieussent ◽  
B. Lundin ◽  
G. Belmont ◽  
...  
Keyword(s):  
Electron Beam ◽  
Whistler Wave ◽  
Wave Emission

Whistler Wave Emission from a Modulated Electron Beam in a Collisional Magnetoplasma in the Presence of a Density Duct

2005 ◽  
Vol 48 (9) ◽  
pp. 650-660 ◽  
Author(s):  
T. M. Zaboronkova ◽  
C. Krafft ◽  
A. V. Kudrin ◽  
M. Yu. Lyakh
Keyword(s):  
Electron Beam ◽  
Whistler Wave ◽  
Wave Emission

Whistler wave emission from a modulated electron beam injected in a cylindrical duct with enhanced plasma density

2002 ◽  
Vol 9 (4) ◽  
pp. 1401-1411 ◽  
Author(s):  
A. V. Kudrin ◽  
M. Yu. Lyakh ◽  
T. M. Zaboronkova ◽  
C. Krafft
Keyword(s):  
Electron Beam ◽  
Plasma Density ◽  
Whistler Wave ◽  
Wave Emission ◽  
Cylindrical Duct

Whistler wave emission by a modulated electron beam through transition radiation

1999 ◽  
Vol 6 (5) ◽  
pp. 1427-1434 ◽  
Author(s):  
M. Starodubtsev ◽  
C. Krafft ◽  
P. Thévenet ◽  
A. Kostrov
Keyword(s):  
Electron Beam ◽  
Transition Radiation ◽  
Whistler Wave ◽  
Wave Emission

Whistler emission through transition radiation by a modulated electron beam spiralling in a magnetoplasma

2000 ◽  
Vol 63 (3) ◽  
pp. 285-295 ◽  
Author(s):  
M. STARODUBTSEV ◽  
C. KRAFFT
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
External Magnetic Field ◽  
Transition Radiation ◽  
Physical Processes ◽  
Phase Velocities ◽  
Electric Dipoles ◽  
Wave Emission ◽  
Loop Antennas

Transition radiation from the zone of injection of a modulated electron beam spiralling into a magnetoplasma has been identified as whistler waves propagating quasiparallel to the external magnetic field. The characteristics of the radiation are similar to the emission by localized sources, such as loop antennas and electric dipoles: resonance-cone structures at low plasma densities and energy flow along the external magnetic field at higher densities, with a diverging radiation pattern and with whistler phase velocities inversely proportional to the plasma frequency. These studies should contribute to a wider understanding of the physical processes connected with the injection of charges in a magnetoplasma – either from a gun on board a spacecraft or in a plasma chamber – and thus allow the determination of appropriate radiator characteristics in order to control, to some extent, plasma perturbations and wave emission in the region of the injector.

scholarly journals Zebra-like patterns in whistler wave emission spectra from nonequilibrium mirror-confined laboratory plasma

2020 ◽  
Vol 27 (6) ◽  
pp. 062104 ◽  
Author(s):  
M. E. Viktorov ◽  
A. G. Shalashov ◽  
E. D. Gospodchikov ◽  
N. Yu. Semin ◽  
S. V. Golubev
Keyword(s):  
Emission Spectra ◽  
Whistler Wave ◽  
Laboratory Plasma ◽  
Wave Emission

Whistler wave emission by a modulated electron beam injected into a plasma column surrounded by a uniform medium

2007 ◽  
Vol 73 (6) ◽  
pp. 967-980
Author(s):  
C. KRAFFT ◽  
T. M. ZABORONKOVA
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Plasma Column ◽  
Modulation Frequency ◽  
Whistler Wave ◽  
Wave Radiation ◽  
Physical Conditions ◽  
Beam Modulation ◽  
Uniform Medium ◽  
Thin Electron

AbstractThe efficiency of whistler wave radiation by a density modulated and thin electron beam of finite length injected parallel with respect to the constant ambient magnetic field into a cylindrical plasma column surrounded by a uniform isotropic medium and aligned along the magnetic field is studied. A rigorous analytical derivation of the wave fields excited by the beam in the plasma column is presented. The time-averaged power radiated by the beam at the modulation frequency is determined. In particular, numerical calculations performed for physical conditions relevant to laboratory magnetized discharge plasmas show that, in the presence of a plasma column, the power lost by the modulated beam can be efficiently enhanced owing to resonant Cherenkov excitation of guided whistler modes at the beam modulation frequency.

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