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Electrical and Computer Engineering
Electrical and Computer Engineering Faculty Publications and Presentations
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A Faceted Magnetron Concept Using Field Emission Cathodes, Jim Browning, Jack Watrous
A Faceted Magnetron Concept Using Field Emission Cathodes, Jim Browning, Jack Watrous
Electrical and Computer Engineering Faculty Publications and Presentations
A magnetron concept using field emission cathodes has been modeled with the Air Force Research Laboratory particle-in-cell code ICEPIC and the 2D particle trajectory simulation Lorentz2E. In this approach, field emitters are used to provide a distributed cathode in place of a traditional thermionic cathode. The emitters are placed below the interaction space in a shielded structure. The cathode is comprised of facet plates with slits to protect the emitters. Simulation of an L-band rising sun magnetron shows that the faceted magnetron will oscillate using both five and ten facet cathodes. The startup times are very similar to that of …
Electron Hop Funnel Measurements And Comparison With The Lorentz-2e Simulation, Charles Lester, Jim Browning, Lael Matthews
Electron Hop Funnel Measurements And Comparison With The Lorentz-2e Simulation, Charles Lester, Jim Browning, Lael Matthews
Electrical and Computer Engineering Faculty Publications and Presentations
Electron hop funnels have been fabricated using a Low Temperature Co-Fired Ceramic (LTCC). Measurements of the hop funnel I-V curve and electron energy distribution have been made using gated field emitters as the electron source. The charged particle simulation Lorentz 2E has been used to model the hop funnel charging and to predict the I-V and energy characteristics. The results of this comparison indicate that the simulation can be used to design hop funnel structures for use in various applications.