Experimental investigations of the TE11 mode radiation from a relativistic magnetron with diffraction output

Li, Wei; Liu, Yonggui; Zhang, Jun; Yang, Hanwu; Qian, Bao‐Liang

doi:10.1063/1.4767647

Cited by 6 publications

(1 citation statement)

References 14 publications

(5 reference statements)

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“…Computer simulation needs to build a corresponding model, and simulation takes a long time [7], [8]. Experimental measurement needs to complete the design and processing, so it is not suitable to the predesign and analysis of magnetrons [9]- [11]. These three methods are all difficult to get an exact expression of the resonance frequency as a function of structure dimensions.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Circuit Method of Resonant System of Magnetron With Sector-and-Slot Resonant Cavities

Yue

Zhang

Gao

2014

IEEE Trans. Plasma Sci.

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In this paper, the equivalent capacitance and inductance of sector-and-slot resonant cavities are investigated theoretically by the equivalent circuit method. Thereby, the expression of the resonance frequency is obtained as a function of structure dimensions. In addition, the effects of structure dimensions on equivalent capacitance, inductance, and π-mode frequency are analyzed numerically, especially the slot width, slot length, and height. The results show that, compared with field theory, the equivalent circuit method is in more consistent with the simulation results, which verifies the validity of the equivalent circuit method. With the given structure dimensions, the equivalent capacitance increases with the increasing of slot length and height or the decreasing of slot width, while the equivalent inductance is opposite. Therefore, the change tendency of resonance frequency is determined by the relative changes of the capacitance, inductance, and coupling capacitance. This method can help to predesign and analyze resonant system of magnetrons with sector-and-slot resonant cavities efficiently.Index Terms-Equivalent circuit method, magnetron, resonant frequency, sector-and-slot resonant cavities.

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Section: Introductionmentioning

confidence: 99%

Equivalent Circuit Method of Resonant System of Magnetron With Sector-and-Slot Resonant Cavities

Yue

Zhang

Gao

2014

IEEE Trans. Plasma Sci.

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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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Operation characteristics of a ten-cavity magnetron with TE11 mode extracted through compact diffraction output

Liu,

Meng,

Zhang

et al. 2023

Physics of Plasmas

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We present the design of a ten-cavity magnetron extracting TE11 mode through compact diffraction output (DO). The effect of the DO length and the depth of the vane on the performance of the ten-cavity magnetron are investigated to design a compact diffraction structure. By adjusting the length of DO and the depth of the tapered cavities to provide a proper Qe, the output power and power conversion efficiency have been improved. Simulation results of the magnetron with compact DO (the length of the DO is about half an operation wavelength) show that the microwave power of 3.0 MW with a high conversion efficiency of 62% at 2.4 GHz is achieved under an applied voltage of 56 kV and a fixed axial magnetic field of 0.24 T. In addition, the length of the anode block is designed longer than the cathode to arrange the permanent magnet, which has been preliminary designed.

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Experimental investigations of the TE11 mode radiation from a relativistic magnetron with diffraction output

Cited by 6 publications

References 14 publications

Equivalent Circuit Method of Resonant System of Magnetron With Sector-and-Slot Resonant Cavities

Equivalent Circuit Method of Resonant System of Magnetron With Sector-and-Slot Resonant Cavities

Review of the relativistic magnetron

Operation characteristics of a ten-cavity magnetron with TE11 mode extracted through compact diffraction output

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