A co-axial electron gun to generate millimeter-wave RF using the two-stream instability
| Autor: | V. Pavlenko, Nikolai Yampolsky, Kip Bishofberger, D. Neben |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Physics Solenoidal vector field Physics::Instrumentation and Detectors business.industry Electron 01 natural sciences Cathode 010305 fluids & plasmas law.invention Two-stream instability Optics law Electric field 0103 physical sciences Cathode ray Physics::Accelerator Physics business Instrumentation Beam (structure) Electron gun |
| Zdroj: | The Review of scientific instruments. 92(5) |
| ISSN: | 1089-7623 |
| Popis: | A novel source for broadband millimeter-wave RF is being designed at Los Alamos National Laboratory utilizing the two-stream instability. This RF source offers the potential for consistent output power over a large bandwidth on a single device. The source is designed to use two co-axial electron beams coupled into solenoidal magnetic fields. This is accomplished using two cathodes independently modulated nested in each other. The electron beam energy from the innermost cathode will fall in the range between 15 and 20 keV with the beam energy from the outer cathode being 75%–95% of the inner beam energy. In order to efficiently match the beam from the outer cathode into the solenoidal magnetic field, shields are used around the cathodes to shape the electric field in the gun region to extend the electrostatic focal length of the beams for better coupling into the magnetic field. We present the design of electron guns and expected performance using Trak simulations. |
| Databáze: | OpenAIRE |
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