2011
DOI: 10.1109/tps.2011.2159997
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Simulations of Multipactor Breakdown Between Two Cylinders

Abstract: Simulations have been performed to determine the multipactor breakdown threshold in a microwave structure comprised of two parallel cylinders, chosen to be an approximate model of an open helix microwave antenna system. The electromagnetic field between the cylinders is available in closed analytical form and a Monte Carlo software has been developed to calculate the 2D electron trajectories and to simulate the multipactor avalanche in this inhomogeneous electric field for different ratios of cylinder radius a… Show more

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Cited by 7 publications
(10 citation statements)
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“…8. Silver has W 1 = 30 eV, and σ max = 2.22 29,30,32 , and the act of solving for the breakdown threshold consists in finding the electric field strength ratio E 0 /E 1 which produces a steady state impactemission density for a given ratio W e /W 1 . The two dashed lines indicate the approximations corresponding to non-resonant (Eq.…”
Section: B Solutionsmentioning
confidence: 99%
See 2 more Smart Citations
“…8. Silver has W 1 = 30 eV, and σ max = 2.22 29,30,32 , and the act of solving for the breakdown threshold consists in finding the electric field strength ratio E 0 /E 1 which produces a steady state impactemission density for a given ratio W e /W 1 . The two dashed lines indicate the approximations corresponding to non-resonant (Eq.…”
Section: B Solutionsmentioning
confidence: 99%
“…The choice of parameters corresponds to silver, and is the same as in our previous recent publications 29,30 , making the results easy to compare. But as is seen in Fig.…”
Section: B Solutionsmentioning
confidence: 99%
See 1 more Smart Citation
“…En los filtros paso-bajo en guiaonda, las ventanas rectangulares capacitivas son típicamente empleadas. La presencia de esquinas y bordes causan campos electromagnéticos de nivel elevado en sus proximidades (efecto "fringing fields"), que pueden conducir a efectos negativos de alta potencia como el "multipactor" (veáse [Semenov et al, 2008, Rasch et al, 2011) y el efecto "corona" (veáse ). Esto es crítico para las aplicaciones de alta potencia en las comunicaciones por satélite, ya que limitan el nivel de potencia que un filtro microondas puede manejar sin que se produzcan fenómenos destructivos.…”
Section: Introductionunclassified
“…Por ello, se propone utilizar postes conductores con forma circular o elíptica, en sustitución de las placas paralelas. En trabajos recientes,[Rasch et al, 2010, Rasch et al, 2011, se demuestra que el umbral de potencia de ruptura debido a dispersión de las trayectorias es menos probable entre cilindros que entre placas paralelas, debido a la dispersión de las trayectorias de los electrones emitidos, causados por la curvatura de las superficies redondeadas. Para la realización de los filtros basados en estas topologías, se empleará un método basado en analizar los parámetros [ABCD] o los parámetros de scattering, para cada inversor de impedancias que se haya sintetizado.…”
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