Title :
Two-dimensional calculation of pulse power and energy loss in microwave air breakdown bandwidth broadening
Author_Institution :
Lawrence Livermore Nat. Lab., Livermore, CA, USA
Abstract :
Summary form only given. It has been demonstrated experimentally that bandwidth broadening results from air breakdown in the WR-284 rectangular waveguide. This bandwidth enhancement has been simulated with an implicit, two-dimensional, electromagnetic, electron fluid computer code for avalanche ionization. Code simulations have predicted the broadening of 3.5-ns, 0.342-GHz-bandwidth pulses at 2.8608 GHz incident on spatially Gaussian initial electron density profiles with an axial FWHM of 3 cm in 3.5-torr air. For incident amplitudes from 1 to 18.5 MV/m and peak initial densities of 10-10/sup 11/ cmsup -3/, transmitted 3 dB bandwidths of 0.352-3.21 GHz (12.3-112% relative to the incident frequency) and center frequencies from 2.82 to 4.72 GHz (98.6-165% relative) were obtained.
Keywords :
rectangular waveguides; 2.82 to 4.72 GHz; 2.8608 GHz; 2D calculation; 2D electromagnetic code; 3.5 ns; 3.5 torr; WR-284 rectangular waveguide; avalanche ionization; axial FWHM; bandwidth enhancement; code simulations; electron fluid computer code; energy loss; microwave air breakdown bandwidth broadening; pulse power; spatially Gaussian initial electron density profiles; Bandwidth; Computational modeling; Computer simulation; Electric breakdown; Electromagnetic waveguides; Electrons; Energy loss; Frequency; Ionization; Rectangular waveguides;
Conference_Titel :
Plasma Science, 1993. IEEE Conference Record - Abstracts., 1993 IEEE International Conference on
Conference_Location :
Vancouver, BC, Canada
Print_ISBN :
0-7803-1360-7
DOI :
10.1109/PLASMA.1993.593402
