Two-dimensional calculation of short electromagnetic pulse propagation and ionization in low-pressure, argon-filled cylindrical cavities
Conference
·
OSTI ID:42967
- Lawrence Livermore National Lab., Livermore, CA (United States)
Two-dimensional, electromagnetic, finite difference, electron fluid computer codes have previously been used to calculate short-pulse (1--20 ns), high-power (1--70 MW) microwave breakdown and transmission effects in low-pressure (1--600 torr), air-filled, rectangular and parallel plate waveguides. The relevant Maxwell curl equations were solved self-consistently with the first three moments of the Boltzmann equation under the assumption of a Maxwellian velocity distribution. Since the primary focus of the work was on the transmitted electromagnetic wave, instead of the details of the plasma generated by the incident wave, approximate electron fluid equations wee employed. In the present investigation, the authors made the fluid equations less approximate by including more terms. In this investigation, the time-dependent Maxwell equations are applied to axisymmetric, TE{sub mo} mode cylindrical cavities, which are filled with argon at pressures of the order of 1 torr. The fluid equations include magnetic forces, bias magnetic fields, and electron pressure gradients. Since the H{sub {phi}} component is presently neglected as small, five electromagnetic components are solved for in the code. Pulse amplitude, shape, and duration are varied, as are cavity geometry and pressure. Results for the electromagnetic components will be presented. Results for electron density, energy, and pressure will also be shown.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 42967
- Report Number(s):
- CONF-940604--; ISBN 0-7803-2006-9
- Country of Publication:
- United States
- Language:
- English
Similar Records
ANALYSIS OF WAVE PROPAGATION IN A MAGNETOPLASMA-FILLED WAVEGUIDE
Initial Testing Of A Two-dimensional Computer Code For Microwave-induced Surface Breakdown In Air [Book Chapter]
Prediction of electromagnetic pulse generation by picosecond avalanches in high-pressure air
Journal Article
·
Sat Nov 30 23:00:00 EST 1963
· Journal of Applied Physics (U.S.)
·
OSTI ID:4138824
Initial Testing Of A Two-dimensional Computer Code For Microwave-induced Surface Breakdown In Air [Book Chapter]
Conference
·
Mon Jun 17 00:00:00 EDT 1991
· Eighth IEEE International Conference on Pulsed Power
·
OSTI ID:5306686
Prediction of electromagnetic pulse generation by picosecond avalanches in high-pressure air
Conference
·
Fri May 01 00:00:00 EDT 1992
·
OSTI ID:10170872