DocumentCode
3545015
Title
Microwave oscillation, mode control and extraction in the recirculating planar magnetron
Author
Franzi, Matthew ; Gilgenbach, Ronald M. ; Hoff, Brad W. ; Lau, Y.Y. ; Greening, Geoffrey ; Chalenski, David ; Jordan, N.M. ; Simon, D. ; Luginsland, John W.
Author_Institution
Nucl. Eng. & Radiol. Sci. Dept., Univ. of Michigan, Ann Arbor, MI, USA
fYear
2013
fDate
16-21 June 2013
Firstpage
1
Lastpage
1
Abstract
Summary form only given. The recirculating planar magnetron (RPM) is a crossedfield device that combines the advantages of high-efficiency recirculating devices with those of planar devices: both large-area cathode (high current) and anode (improved thermal management). Preliminary experiments using the RPM-12a, the first L-band prototype, have successfully produced high power microwave pulses 50-300 ns in length at approximately 1 GHz . The device is driven using the Michigan Electron Long Beam Accelerator with Ceramic insulator (MELBA-C) which delivers a pulsed cathode bias of -300 kV for durations of 0.3-1.0 μs. The RPM is capable of generating 2-10 kA and is typically operated with an externally applied axial magnetic field between 0.18-0.2 T. Recent experimental work has focused on enhancing mode separation and cross-oscillator coupling using the mode control cathode (MCC). The MCC is a periodically slotted emission structure that provides RF feedback between oscillators and may be geometrically manipulated to improve mode separation independently from the anode structure. Future studies will continue to focus on phase locking using the MCC as well as a guided extraction mechanism for the planar slow wave structures. Power extraction is to be accomplished using on an adaptation of the “all cavity extractor” (Greenwood et al.) that uses a coaxial transmission line to axially extract RF power in the TEM mode. An experimental D-band RPM prototype using the coaxial all cavity extractor system is under design and construction; operation is anticipated for the summer of 2013.
Keywords
magnetrons; microwave oscillators; D-band RPM prototype; MELBA-C; Michigan electron long beam accelerator with ceramic insulator; RF feedback; axial magnetic field; coaxial all cavity extractor system; high power microwave pulse; large area anode; large area cathode; magnetic flux density 0.18 T to 0.2 T; microwave oscillation; mode control; recirculating planar magnetron; slotted emission structure; thermal management; voltage -300 kV; Cathodes; Cavity resonators; Green products; Magnetic separation; Microwave oscillators; Plasmas;
fLanguage
English
Publisher
ieee
Conference_Titel
Plasma Science (ICOPS), 2013 Abstracts IEEE International Conference on
Conference_Location
San Francisco, CA
ISSN
0730-9244
Type
conf
DOI
10.1109/PLASMA.2013.6633278
Filename
6633278
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