Title :
Electromagnetic wave excitation by a modulated electron beam injected in an anisotropic plasma channel
Author :
Kudrin, Alexander V. ; Lyakh, Mikhail Yu ; Zaboronkova, Tatyana M. ; Krafft, Catherine
Author_Institution :
Dept. of Radiophys., Univ. of Nizhny Novgorod, Russia
Abstract :
A study is made of electromagnetic radiation from a thin modulated electron beam of finite length injected parallel to an external magnetic field in a magnetic-field-aligned cylindrical plasma channel immersed in a uniform ambient magnetoplasma. A rigorous solution for the beam-excited field is obtained and the power lost by the beam in the presence of the channel is examined. A significant difference between the features of whistler wave emission in the presence of a channel and in the case of a homogeneous unbounded plasma is revealed. Estimates of the power emitted in the whistler frequency band are given for a representative example of an artificial plasma channel with enhanced density in a plasma modeled upon the Earth´s ionosphere
Keywords :
anisotropic media; electromagnetic fields; electron beams; modulation; plasma density; plasma electromagnetic wave propagation; whistlers; Earth´s ionosphere; anisotropic plasma channel; artificial plasma channel; beam-excited field; collisional magnetized plasma; cylindrical plasma channel; electromagnetic radiation; electromagnetic wave excitation; external magnetic field; homogeneous unbounded plasma; modulated electron beam; plasma density; uniform ambient magnetoplasma; whistler frequency band; whistler wave emission; Earth; Electromagnetic radiation; Electromagnetic scattering; Electron beams; Frequency estimation; Magnetic fields; Magnetic modulators; Optical modulation; Plasma density; Plasma waves;
Conference_Titel :
Day on Diffraction 2001. Proceedings. International Seminar
Conference_Location :
St.Petersburg
Print_ISBN :
5-7997-0366-9
DOI :
10.1109/DD.2001.988487
