Two-dimensional calculation of short electromagnetic pulse propagation and ionization in low-pressure, argon-filled cylindrical cavities
- 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; TRN: IM9521%%131
- Resource Relation:
- Conference: 1994 Institute of Electrical and Electronic Engineers (IEEE) international conference on plasma science, Santa Fe, NM (United States), 6-8 Jun 1994; Other Information: PBD: 1994; Related Information: Is Part Of IEEE conference record -- Abstracts; PB: 252 p.
- Country of Publication:
- United States
- Language:
- English
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