Rising Sun Magnetrons with Large Numbers of Cavities

Hollenberg, A. V.; Kroll, N.; Millman, S.

doi:10.1063/1.1698182

Cited by 12 publications

(2 citation statements)

References 2 publications

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“…The simulation was completed using the 3D particle-in-cell (PIC) code ICEPIC. This paper describes the simulation of a 2D model of a ten-cavity rising sun [8][9][10][11][12] magnetron using the PIC code VORPAL. 13 This paper only covers the analysis of the 2D simulation of the ten cavity, rising sun magnetron for the cylindrical and faceted cathodes (five-and ten-sided) using a typical current source which we refer to as a "continuous" current source.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a rising sun magnetron employing a faceted cathode with a continuous current source

Fernandez-Gutierrez

Browning

Lin

et al. 2014

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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It has been proposed that gated field emitters could be used in place of conventional thermionic cathodes to control the current injection in a magnetron, both temporally and spatially. Since gated field emitters have to be fabricated on flat surfaces, a faceted cathode would be used to implement this approach. A 2D ten cavity, rising sun magnetron has been modeled using the particle-in-cell code VORPAL. Cylindrical, five-sided, and ten-sided faceted cathodes were modeled to study the variation of magnetron operation due to the cathode shape. This work shows the results of the device performance employing three different cathode geometries with a typical continuous current source. The cathode voltage is À22.2 kV; magnetic field is 0.09 T; and linear current density is 326 A/m. The three models oscillated at the p-mode, at a frequency of 960 MHz for the cylindrical cathode and 957 MHz for the faceted cathodes. Simulations show a faster start up time for the tensided faceted cathode. This resulted in a reduced overall startup time of the device from 200 to 110 ns. A strong current instability was observed in the five-sided cathode case with a periodicity range from 250 to 350 ns. This instability was limited to the start-up period of the ten-sided cathode model; hence the ten-sided case was more stable.

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Section: Introductionmentioning

confidence: 99%

Simulation of a rising sun magnetron employing a faceted cathode with a continuous current source

Fernandez-Gutierrez

Browning

Lin

et al. 2014

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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“…[18][19][20] As was shown in previous work, [15][16][17] this device is comprised of a faceted cathode with addressable current sources that allow the control of the current in time and space. These sources could be gated field emission arrays or even photocathodes.…”

mentioning

confidence: 99%

Dynamic phase-control of a rising sun magnetron using modulated and continuous current

Fernandez-Gutierrez

Browning

Lin

et al. 2016

Journal of Applied Physics

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Phase-control of a magnetron is studied via simulation using a combination of a continuous current source and a modulated current source. The addressable, modulated current source is turned ON and OFF at the magnetron operating frequency in order to control the electron injection and the spoke phase. Prior simulation work using a 2D model of a Rising Sun magnetron showed that the use of 100% modulated current controlled the magnetron phase and allowed for dynamic phase control. In this work, the minimum fraction of modulated current source needed to achieve a phase control is studied. The current fractions (modulated versus continuous) were varied from 10% modulated current to 100% modulated current to study the effects on phase control. Dynamic phase-control, stability, and start up time of the device were studied for all these cases showing that with 10% modulated current and 90% continuous current, a phase shift of 180 can be achieved demonstrating dynamic phase control. V C 2016 AIP Publishing LLC.

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Magnetron Modes and the Chimera State

Law

Dowling

2018

Fractional Dynamics, Anomalous Transport and Plasma Science

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Rising Sun Magnetrons with Large Numbers of Cavities

Cited by 12 publications

References 2 publications

Simulation of a rising sun magnetron employing a faceted cathode with a continuous current source

Simulation of a rising sun magnetron employing a faceted cathode with a continuous current source

Dynamic phase-control of a rising sun magnetron using modulated and continuous current

Magnetron Modes and the Chimera State

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