On the Influence of the Electron Velocity Spread on the Passband Properties of Gyroklystrons

2021 ◽  
Author(s):  
E. V. Zasypkin
Keyword(s):  
Electron Velocity ◽  
Velocity Spread

scholarly journals Исследование и оптимизация характеристик генерации сверхмощного виртода

2019 ◽  
Vol 89 (3) ◽  
pp. 436
Author(s):  
А.А. Бадарин ◽  
С.А. Куркин ◽  
Н.С. Фролов ◽  
А.О. Рак ◽  
А.Е. Храмов
Keyword(s):  
Virtual Cathode ◽  
Electron Velocity ◽  
Velocity Spread ◽  
Optimal Parameters ◽  
Generation Efficiency ◽  
3D Numerical Simulation ◽  
Beam Velocity ◽  
Large Spread ◽  
Beam Parameters ◽  
Output Characteristics

AbstractWe report on the results of the 3D numerical simulation of perspective design of an oscillator based on an external-feedback virtual cathode (virtode), as well as optimization of characteristics of its generation. We have analyzed the effect of beam parameters on the virtode output characteristics. In particular, we have obtained the dependence of the efficiency on the feeding voltage and on the current being injected. We have studied the effect of beam velocity premodulation and electron velocity spread on virtode generation characteristics. It has been established that the introduction of premodulation sharply increases the generation efficiency up to 13% for optimal parameters. The possibility of stable generation in the virtode at relatively large spread in electron velocities has been demonstrated.

Nonlinear interaction of obliquely propagating Bernstein waves with electrons in a plasma

1988 ◽  
Vol 40 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Masao Sugawa
Keyword(s):  
Energy Exchange ◽  
Turbulent Plasma ◽  
Electron Velocity ◽  
Velocity Spread ◽  
Monochromatic Wave ◽  
Electron Velocity Distribution ◽  
Wave Approximation ◽  
Bernstein Waves ◽  
The Waves ◽  
Resonant Velocity

We obtain analytical expression for the interaction of obliquely propagating Bernstein waves with electrons by using the monochromatic wave approximation for quasi-linear theory in a weakly turbulent plasma. A numerical analysis is also carried out. The waves show initially strong damping and irregular amplitude oscillation, and the electron velocity distribution shows a variation corresponding to one of the waves. These are results of the energy exchange between waves and electrons. Despite the use of the monochromatic wave approximation, strongly scattering electrons with a broad velocity spread about the resonant velocity by the wave is seen.

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