Electromagnetic Wave Excitation by a Modulated Electron Beam Injected from Spacecraft into the Ionosphere

2005 ◽  
Vol 48 (5) ◽  
pp. 1052-1060 ◽  
Author(s):  
Yong YANG ◽  
Zheng-Yu ZHAO ◽  
I. O. Anisimov
Keyword(s):  
Electron Beam ◽  
Electromagnetic Wave ◽  
Wave Excitation

Electromagnetic-wave-pumped free-electron laser in a plasma channel

1997 ◽  
Vol 58 (4) ◽  
pp. 613-621 ◽  
Author(s):  
JETENDRA PARASHAR ◽  
H. D. PANDEY ◽  
A. K. SHARMA ◽  
V. K. TRIPATHI
Keyword(s):  
Electron Beam ◽  
Electromagnetic Wave ◽  
Laser Radiation ◽  
Laser Pulse ◽  
Free Electron Laser ◽  
Relativistic Electron Beam ◽  
Plasma Channel ◽  
Beam Quality ◽  
Coherent Radiation ◽  
Millimetre Wave

An intense short laser pulse or a millimetre wave propagating through a plasma channel may act as a wiggler for the generation of shorter wavelengths. When a relativistic electron beam is launched into the channel from the opposite direction, the laser radiation is Compton/Raman backscattered to produce coherent radiation at shorter wavelengths. The scheme, however, requires a superior beam quality with energy spread less than 1% in the Raman regime.

scholarly journals Information’s Relativistic Convey with Matter Wave’s Non-Dispersive Propagation

2020 ◽  
pp. 1-4
Author(s):  
Wang Xinye
Keyword(s):  
Quantum Mechanics ◽  
Electron Beam ◽  
Electromagnetic Wave ◽  
Duality Theory ◽  
Relativity Theory ◽  
Matter Wave ◽  
Maximum Value ◽  
Wave Particle Duality ◽  
Dispersive Propagation ◽  
Special Relativity Theory

The Wave-Particle Duality is a basic property of microscopic particles. As a basic concept of quantum mechanics, the wave-particle duality theory from elementary particles to big molecules had been verified by lots of experiments. Different from electromagnetic wave, the matter wave’s propagation is not only fast but also adjustable. According to the special relativity theory, the group velocity with which the overall envelope shape of the wave, namely the related particle’s propagation and information convey speed is changeable with its energy and related wavelength, among which only the energy exceeds over the minimum value, the propagation can be starting and the velocity is not allowed to surpass the maximum value i.e. the light speed in vacuum. Take electron as an example, if the free electron beam gains energy higher than around 8.187×10ˉᴵ⁴J and the related wavelength is shorter than around 5.316×10ˉ³nm, the matter wave with information can start to propagate.  

Sign in / Sign up

Export Citation Format

Share Document