DocumentCode :
923385
Title :
Theoretical Study of a Plasma-Filled Relativistic Cerenkov Generator With Coaxial Slow-Wave Structure
Author :
Renzhen, Xiao ; Yuzheng, Lin ; Zhimin, Song ; Changhua, Chen ; Guozhi, Liu
Author_Institution :
Tsinghua Univ., Beijing
Volume :
35
Issue :
5
fYear :
2007
Firstpage :
1456
Lastpage :
1466
Abstract :
The linear and nonlinear theory of a plasma-filled relativistic Cherenkov generator with coaxial slow-wave structure (SWS) is developed. Linear analysis includes the space-charge limiting current, dispersion relations, dispersion curves, and coupling impedance. In nonlinear theory, the electron beam space-charge effect, nonsynchronous interaction, and complex reflection coefficients of the electromagnetic wave at the boundaries of the SWS are taken into account. With the assumption of quasi steady state, the self-consistent equations are numerically calculated using the fourth-order Runge-Kutta method. The effects of the relative phase between inner and outer corrugations, phase and amplitude of the complex reflection coefficient at the boundaries of the SWS, and plasma density on device efficiency are discussed. Efficiencies of up to 37% without plasma and about 50% with plasma density of np = 3-7 times 1011 cm-3 are obtained.
Keywords :
Cherenkov radiation; Runge-Kutta methods; dispersion relations; plasma density; plasma electromagnetic wave propagation; plasma filled waveguides; plasma nonlinear processes; reflectivity; relativistic plasmas; space-charge-limited conduction; Cherenkov radiation; coaxial slow-wave structure; complex reflection coefficients; corrugations; coupling impedance; dispersion curves; dispersion relations; electromagnetic wave; electron beam space-charge effect; fourth-order Runge-Kutta method; nonlinear theory; nonsynchronous interaction; plasma density; plasma-filled coaxial cylindrical waveguide; plasma-filled relativistic Cherenkov generator; self-consistent equations; space-charge limiting current; Coaxial components; Dispersion; Electromagnetic reflection; Electromagnetic scattering; Electron beams; Impedance; Optical reflection; Plasma density; Plasma waves; Steady-state; Cerenkov radiation; coaxial slow-wave structure (SWS); dispersion curves; high-power microwave (HPM); nonlinear theory; plasma fill;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2007.905955
Filename :
4343188
Link To Document :
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