Initial phase zone for phase locking to the resonance, using “main condition” of phase stability in DC-biased single-sided multipactor

Mostajeran, M.

doi:10.1063/1.4880100

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…In a previous analysis, 14 the MP zones and stability were studied under the assumption of zero initial velocity of the secondary electrons, using the main stability condition. In this article, this assumption is relaxed and the effect of the variations in the velocity of the emitted electrons on DCbiased single-sided MP zones is studied using a different approach.…”

Section: Introductionmentioning

confidence: 99%

How the “main condition” of phase stability can explain the effect of the velocity deviation of secondary electrons in DC-biased single-sided multipactors

Mostajeran

2014

Physics of Plasmas

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In this work, a "main condition" for phase stability has been employed to investigate the effects of the velocity deviation of the electrons in DC-biased single-sided multipactors (MPs). In a previous study [M. Mostajeran, Phys. Plasmas 21, 053108 (2014)], a stability equation was derived, where the secondary electron was assumed to have zero initial velocity and the phase deviation from the resonant phase was considered. In this work, both deviations in phase and velocity from the resonant condition are taken into account, assuming nonzero initial velocity for the secondary electrons. Using the main condition for stability, it is shown that MP discharge can rise in situations, where large velocity deviations from initial velocity and large phase deviations from resonant phase exist. This is contrary to what can be predicted on the basis of the "simple stability condition." This result is further confirmed by numerical simulations. V C 2014 AIP Publishing LLC.

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Section: Introductionmentioning

confidence: 99%

How the “main condition” of phase stability can explain the effect of the velocity deviation of secondary electrons in DC-biased single-sided multipactors

Mostajeran

2014

Physics of Plasmas

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Stationary statistical theory of two-surface multipactor regarding all impacts for efficient threshold analysis

et al. 2018

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Statistical multipactor theories are critical prediction approaches for multipactor breakdown determination. However, these approaches still require a negotiation between the calculation efficiency and accuracy. This paper presents an improved stationary statistical theory for efficient threshold analysis of two-surface multipactor. A general integral equation over the distribution function of the electron emission phase with both the single-sided and double-sided impacts considered is formulated. The modeling results indicate that the improved stationary statistical theory can not only obtain equally good accuracy of multipactor threshold calculation as the nonstationary statistical theory, but also achieve high calculation efficiency concurrently. By using this improved stationary statistical theory, the total time consumption in calculating full multipactor susceptibility zones of parallel plates can be decreased by as much as a factor of four relative to the nonstationary statistical theory. It also shows that the effect of single-sided impacts is indispensable for accurate multipactor prediction of coaxial lines and also more significant for the high order multipactor. Finally, the influence of secondary emission yield (SEY) properties on the multipactor threshold is further investigated. It is observed that the first cross energy and the energy range between the first cross and the SEY maximum both play a significant role in determining the multipactor threshold, which agrees with the numerical simulation results in the literature.

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Crossed fields and two-sided multipactor

Mostajeran

2018

Physics of Plasmas

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A simple stability condition has been used in multipactor (MP) studies in many published works. A general stability condition has been employed in a few works. In these works, the analytical stability of the motion infinitesimally near resonance phases was derived. The MP phenomenon for two parallel plates is studied in the presence of electric and magnetic fields. A novel stability condition is proposed to obtain the MP zones. This study concerns not only the stable motion infinitesimally near resonance phases, but also the stable motion for small phase deviations from resonance phases, using a “main stability condition.” We provide an improved equation for the stability factor. The explicit analytical solution to this equation makes it possible to develop phase stability zones. We have written and run a computer program which simulates the trajectory of electrons with initial resonance and non-resonance rf phases. We have also tracked electrons starting on one plate and returning to the same plate. In this simulation, the initial velocity of electrons is assumed to be zero. Finally, MP zones are obtained in the Ω–ε plane, using the main stability condition.

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Initial phase zone for phase locking to the resonance, using “main condition” of phase stability in DC-biased single-sided multipactor

Cited by 3 publications

References 18 publications

How the “main condition” of phase stability can explain the effect of the velocity deviation of secondary electrons in DC-biased single-sided multipactors

How the “main condition” of phase stability can explain the effect of the velocity deviation of secondary electrons in DC-biased single-sided multipactors

Stationary statistical theory of two-surface multipactor regarding all impacts for efficient threshold analysis

Crossed fields and two-sided multipactor

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