Multipactor experiment on a dielectric surface

Anderson, R. B.; Getty, W. D.; Brake, M. L.; Lau, Y. Y.; Gilgenbach, R. M.; Valfells, Á.

doi:10.1063/1.1380687

Cited by 28 publications

(14 citation statements)

References 27 publications

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“…The fact is that a radio-transparent window made of dielectric material is the key element of the output and input systems. Specific vacuum discharge due to the processes of the secondary electron emission, which is developed on the window surface, destructs the window (see, e.g., [1][2][3][4]) and eventually is a significant cause impeding the creation of high-power microwave sources.…”

Section: Introductionmentioning

confidence: 99%

Influence of an external magnetic field on the threshold of multipactor onset on a dielectric surface

Vdovicheva

Sazontov

2007

Radiophys Quantum Electron

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537.521.7+621.385.6 In this paper, we propose a theoretical model of the initial stage of development of a one-sided secondary-emission (multipactor) discharge on a dielectric surface. Consideration is based on a statistical method supported by an exact analytical solution for the transit-time distribution function of secondary electrons. The general integral equation allowing us to determine the stationary emission-phase distribution functions and the threshold of multiplicator onset in the presence of an external magnetic field is formulated. It is shown that the presence of an external magnetic field can significantly change the conditions of multipactor onset. It is found that the discharge-zone boundaries calculated within the framework of a statistical model are in qualitative agreement with the results obtained by the Monte-Carlo method.

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Section: Introductionmentioning

confidence: 99%

Influence of an external magnetic field on the threshold of multipactor onset on a dielectric surface

Vdovicheva

Sazontov

2007

Radiophys Quantum Electron

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“…[3][4][5][6][7][8][9][10][11] Most recent studies examine the combined action of a uniform rf field, parallel to the surface, and a uniform dc electric field, normal to the surface ͑the latter will be present, e.g., if the dielectric accumulates charges͒ and are based on Monte Carlo simulations. 2,9,10 ͑An exception is the work by Neuber et al 5 and Valfells et al 11 where an exact solution for the dc field distribution was constructed for a stationary multipactor discharge.͒ However, the use of Monte Carlo simulations requires tremendous computation time since it is necessary to carry out calculations within a wide range of parameters.…”

Section: Introductionmentioning

confidence: 99%

Multipactor discharge on a dielectric surface: Statistical theory and simulation results

et al. 2005

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This paper presents a novel theory for describing the initial stage of a single-surface multipactor discharge on a dielectric surface in the presence of a dc electric field, which returns secondary emitted electrons to the surface. The calculations employ a statistical method based on an exact analytical solution for the probability density of the arrival times of the secondary electrons. A general integral equation determining the steady-state distribution of the emission phases of the secondary electrons and the threshold of the multipactor growth is formulated. A computer program has been developed to implement this theory for realistic secondary yield curves and arbitrary, nonuniform, distributions for velocities and angles of emitted electrons. Susceptibility diagrams, applicable to a wide range of materials, are obtained in terms of the rf and dc electric fields and are found to be relatively independent of the emission distribution of the electrons.

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“…As a result, susceptibility curves for both twometallic-surface and single-dielectric-surface multipactor can be generated, and have generally been found to be consistent with experimental studies. 53,54 In general, multipactor tends to occur at lower electric field strengths, and avoidance of vacuum surface multipactor is possible by careful design of electromagnetic mode patterns, surface geometries, and materials. Some of these measures are required for certified space-based VEDs.…”

Section: Rf Breakdownmentioning

confidence: 99%

Plasma physics and related challenges of millimeter-wave-to-terahertz and high power microwave generation

2008

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Homeland security and military defense technology considerations have stimulated intense interest in mobile, high power sources of millimeter-wave (mmw) to terahertz (THz) regime electromagnetic radiation, from 0.1 to 10THz. While vacuum electronic sources are a natural choice for high power, the challenges have yet to be completely met for applications including noninvasive sensing of concealed weapons and dangerous agents, high-data-rate communications, high resolution radar, next generation acceleration drivers, and analysis of fluids and condensed matter. The compact size requirements for many of these high frequency sources require miniscule, microfabricated slow wave circuits. This necessitates electron beams with tiny transverse dimensions and potentially very high current densities for adequate gain. Thus, an emerging family of microfabricated, vacuum electronic devices share many of the same plasma physics challenges that are currently confronting “classic” high power microwave (HPM) generators including long-life bright electron beam sources, intense beam transport, parasitic mode excitation, energetic electron interaction with surfaces, and rf air breakdown at output windows. The contemporary plasma physics and other related issues of compact, high power mmw-to-THz sources are compared and contrasted to those of HPM generation, and future research challenges and opportunities are discussed.

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Multipactor experiment on a dielectric surface

Cited by 28 publications

References 27 publications

Influence of an external magnetic field on the threshold of multipactor onset on a dielectric surface

Influence of an external magnetic field on the threshold of multipactor onset on a dielectric surface

Multipactor discharge on a dielectric surface: Statistical theory and simulation results

Plasma physics and related challenges of millimeter-wave-to-terahertz and high power microwave generation

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