Recirculating planar magnetrons: simulations and experiment
- Plasma, Pulsed Power and Microwave Lab., Nuclear Engineering and Radiological Sciences Department, University of Michigan, Ann Arbor, Ml (United States)
- Air Force Research Lab., Kirtland AFB, NM (United States)
- Air Force Office of Scientific Research, Arlington, VA (United States)
The Recirculating Planar Magnetron (RPM) is a novel crossed-field device whose geometry is expected to reduce thermal load, enhance current yield as well as ease the geometric limitations in scaling to high RF frequencies as compared to the conventional cylindrical magnetrons. The RPM has two different adaptations: A. Axial B field and radial E field; B. Radial B field and axial E field. The preliminary configuration (A) to be used in experiments at the University of Michigan consists of two parallel planar sections which join on either end by cylindrical regions to form a concentric extruded ellipse. Similar to conventional magnetrons, a voltage across the AK gap in conjunction with an axial magnetic field provides the electrons with an ExB drift. The device is named RPM because the drifting electrons recirculate from one planar region to the other. The drifting electrons interact with the resonantly tuned slow wave structure on the anode causing spoke formation. These electron spokes drive a RF electric field in the cavities from which RF power may be extracted to Waveguides. The RPM may be designed in either a conventional configuration with the anode on the outside, for simplified extraction, or as an inverted magnetron with the anode at the inner conductor, for fast start-up. Currently, experiments at the Pulsed Power and Microwave Laboratory at the University of Michigan are in the setup and design phase. A conventional RPM with planar cavities is to be installed on the Michigan Electron Long Beam Accelerator (MELBA) and is anticipated to operate at -200kV, 0.2T with a beam current of 1-10 kA at 1GHz. The conventional RPM consists of 12 identical planar cavities, 6 on each planar side, with simulated quality factor of 20.
- Research Organization:
- IEEE Electron Devices Society - Vacuum Electronics Committee, IEEE ED-SSC Joint Chapter, Bangalore (India)
- OSTI ID:
- 22078287
- Resource Relation:
- Conference: IVEC-2011: 12. IEEE international vacuum electronics conference, Bangalore (India), 21-24 Feb 2011; Other Information: Country of input: India; 3 refs., 2 figs.; This record replaces 44037471; Related Information: In: Proceedings of the 2011 IEEE international vacuum electronics conference: book of abstracts| 564 p.
- Country of Publication:
- United States
- Language:
- English
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