High-power microwave energy coupling to nitrogen during breakdown
- 1 January 1983
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 54 (1) , 101-106
- https://doi.org/10.1063/1.331733
Abstract
Microwave energy coupling to nitrogen for breakdown conditions has been investigated. The experiments were performed in 25-Torr nitrogen using a 35-GHz 1-μs microwave pulse focused to 33 kW/cm2. The plasma created during breakdown was observed to travel towards the source with a velocity of 4.6×106 cm/s. Spectroscopic measurements using a nitrogen-helium mixture indicate the average electron density over a 2-cm chord to be 4.4×1012 cm−3, and the electron temperature to be 3.8 eV. Microwave cutoff was observed photographically, and suggests the peak electron density to be the collisional critical density. Computer simulations were also performed, and their results are in accord with the experimental results.This publication has 7 references indexed in Scilit:
- Spatial and Temporal Coherence of a 35-GHz Gyromonotron Using the TE/sub 01/ Circular ModeIEEE Transactions on Microwave Theory and Techniques, 1980
- Electron excitation of the (0,0) second positive band of nitrogen from threshold to 1000 eVThe Journal of Chemical Physics, 1974
- VUV Radiometry with Hydrogen Arcs 1: Principle of the Method and Comparisons with Blackbody Calibrations from 1650 Å to 3600 ÅApplied Optics, 1973
- De-excitation of N2 (C 3Πu ; ν′ = 0 and 1) levels in mixtures of oxygen and nitrogenThe Journal of Chemical Physics, 1973
- Breakdown limitations on the transmission of microwave power through the atmosphereIEEE Transactions on Antennas and Propagation, 1964
- Absolute Electron Excitation Cross Sections of HeliumPhysical Review B, 1964
- Factors affecting the Reproducibility of Brightness of Tungsten Strip Lamps for Pyrometer StandardizationJournal of Scientific Instruments, 1946