Additively Manufactured High Power Microwave Anodes

Jordan, Nicholas M.; Greening, Geoffrey B.; Hoff, Brad W.; Maestas, Sabrina S.; Exelby, Steven C.; Gilgenbach, R. M.

doi:10.1109/tps.2016.2565261

Cited by 8 publications

(3 citation statements)

References 12 publications

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“…The precise origin of the second power peak is therefore unknown. Across the range of tested magnetic fields, output powers were notably lower than the power per oscillator in the dual-LBO RPM-12A, which typically produced 50 MW per oscillator [40,41]. The LBO therefore appears to benefit from the dual-structure configuration of the RPM-12A when paired with , where a single, relatively stable operating frequency near 0.985 GHz was observed at magnetic fields other than B 0.19 T. Near this magnetic field, the dominant frequency stabilized at a minimum of approximately 0.970 GHz.…”

Section: Isolated Lbo With Standard Load and Uniform Magnetic Fieldmentioning

confidence: 88%

“…The RPM-12A consisted of two planar cavity arrays of six cavities, and demonstrated 150 MW microwave powers near 1 GHz. In addition to the aluminum RPM-12A, additively-manufactured variants (the RPM-12B and RPM-12C) have also been experimentally demonstrated [41]. These variants were geometrically identical to the RPM-12A, and experiments yielded comparable operation to the RPM-12A.…”

Section: Introductionmentioning

confidence: 99%

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Multi-frequency recirculating planar magnetrons

Greening

Jordan

Exelby

et al. 2016

Applied Physics Letters

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The multi-frequency recirculating planar magnetron (MFRPM) is the first magnetron capable of simultaneous generation of significantly different output frequencies (1 and 2 GHz) in a single operating pulse. Design and simulation of a prototype MFRPM were followed by hardware fabrication and experimental verification using the Michigan Electron Long Beam Accelerator with a Ceramic insulator at −300 kV, 1–5 kA, and 0.14–0.23 T axial magnetic field. Preliminary results demonstrated simultaneous generation of microwave pulses near 1 GHz and 2 GHz at powers up to 44 MW and 21 MW, respectively, with peak total efficiencies up to 9%.

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Section: Isolated Lbo With Standard Load and Uniform Magnetic Fieldmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Multi-frequency recirculating planar magnetrons

Greening

Jordan

Exelby

et al. 2016

Applied Physics Letters

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“…After this work, other scientists were able to perform similar experiments. Noteworthy is Smith, who was responsible for creating the first DNG material [10]. However, the applications previously studied had no relation to HPM.…”

Section: Introductionmentioning

confidence: 99%

Experimental Testing of a 3-D-Printed Metamaterial Slow Wave Structure for High-Power Microwave Generation

Alleluia

Abdelshafy

Ragulis

et al. 2020

IEEE Trans. Plasma Sci.

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Laboratory. As an experimentalist, he understood my preferences for not coding and computer simulation, although he introduced me to CST and PIC simulator. After 6 months of polishing bits and bytes first results came out. Today, one year and 11 months later I do recognize the importance of computational tools. I would like to thank my committee members, Professors Mark Gilmore and Ahmed Elfrgani for joining Dr. Schamiloglu for their good advice and suggestions. I would like to acknowledge the financial support of the Electrical and Computer Engineering Department of the University of New Mexico and the Brazilian Government for providing me the necessary financial support throughout my thesis work. I especially would like to thank my advisor for the schollarship provided to support my studies. I am very much indebted to Mr. Bill Moeney, who provided deep conversation and thoughts about pulsed power regarding electron accelerators. v I am very much indebted to Dr Jane Lehr, who helped me in the modelling and simulaton of pulsed power systems and good conversations about high power electromagnetic fields. This thesis would not have been possible without the help, support, and patience of my lab mates Dmitrii Andreev (the Red October), Artem Kuskov (AK), Braulio Martinez, Stacie Hernandes, Joe, Raul, Bi, Jacob, Max, and the 5 new undergraduate students Chris, Eli, Cameron, Ethan, and Anna who drove me crazing with questions around the lab. It would have been a very lonely lab without all of them. I would like to thank staff members Mrs. Yvoné Nelson and Cornelia Platero who provided academic and administrative support for my thesis work.

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Review of the relativistic magnetron

Andreev

Kuskov

Schamiloglu

2019

Matter and Radiation at Extremes

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The cavity magnetron is the most compact, efficient source of high-power microwave (HPM) radiation. The imprint that the magnetron has had on the world is comparable to the invention of the nuclear bomb. High- and low-power magnetrons are used in many applications, such as radar systems, plasma generation for semiconductor processing, and—the most common—microwave ovens for personal and industrial use. Since the invention of the magnetron in 1921 by Hull, scientists and engineers have improved and optimized magnetron technology by altering the geometry, materials, and operating conditions, as well as by identifying applications. A major step in advancing magnetrons was the relativistic magnetron introduced by Bekefi and Orzechowski at MIT (USA, 1976), followed by the invention of the relativistic magnetron with diffraction output (MDO) by Kovalev and Fuks at the Institute of Applied Physics (Soviet Union, 1977). The performance of relativistic magnetrons did not advance significantly thereafter until researchers at the University of Michigan and University of New Mexico (UNM) independently introduced new priming techniques and new cathode topologies in the 2000s, and researchers in Japan identified a flaw in the original Soviet MDO design. Recently, the efficiency of the MDO has reached 92% with the introduction of a virtual cathode and magnetic mirror, proposed by Fuks and Schamiloglu at UNM (2018). This article presents a historical review of the progression of the magnetron from a device intended to operate as a high-voltage switch controlled by the magnetic field that Hull published in 1921, to the most compact and efficient HPM source in the twenty-first century.

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Additively Manufactured High Power Microwave Anodes

Cited by 8 publications

References 12 publications

Multi-frequency recirculating planar magnetrons

Multi-frequency recirculating planar magnetrons

Experimental Testing of a 3-D-Printed Metamaterial Slow Wave Structure for High-Power Microwave Generation

Review of the relativistic magnetron

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