Microwave propagation through an apertured coaxial waveguide
Journal Article
·
· Phys. Rev. A; (United States)
We have studied microwave coupling phenomena in linear and nonlinear regimes. Analytic calculations and two-dimensional plasma simulations were carried out for microwave transmission in an apertured coaxial waveguide. In the linear regime, the transmission characteristics for a finite-length aperture that includes the fringing fields were obtained. In the nonlinear regime, where field emission of electrons occurs, we found that the microwave transmission was characterized by the parameter ..cap omega../sup 2//..omega../sup 2/, where ..cap omega.. is the electron cyclotron frequency in the electromagnetic field and ..omega.. is the microwave frequency. When ..cap omega../sup 2//..omega../sup 2/<<1 and ..cap omega../sup 2//..omega../sup 2/>>1, significant microwave power can be transmitted through the aperture. For ..cap omega../sup 2//..omega../sup 2/approx. >1, aperture closure due to field-emitted electrons becomes important, and severe degradation of microwave transmission was observed in our simulation.
- Research Organization:
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- OSTI ID:
- 6825797
- Journal Information:
- Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:9; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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