Simple model of the rf noise generated by multipacting electrons

Semenov, V. E.; Rakova, E.; Zharova, N. A.; Rasch, Joel; Anderson, Dan; Puech, J.

doi:10.1088/0022-3727/47/5/055206

Cited by 16 publications

(6 citation statements)

References 17 publications

(21 reference statements)

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“…Multipactor can have detrimental effects on devices' normal operation: increasing the system noise level leading to signal degradation [8], outgassing [9], raising the local temperature of the device that may damage internal components [10], loading the cavity with the build-up of an electron cloud [11], and generating undesirable harmonics [12]. If not stopped, the temperature rise, and the subsequent increase of pressure due to particles' desorption, caused by multipactor, can trigger a corona discharge which may lead to components' destruction [9], [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of multipactor thresholds for coaxial lines subject to surface conditioning for the WEST ion cyclotron antenna

Sleiman

Hillairet

Belhaj

et al. 2022

Fusion Engineering and Design

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Section: Introductionmentioning

confidence: 99%

Evaluation of multipactor thresholds for coaxial lines subject to surface conditioning for the WEST ion cyclotron antenna

Sleiman

Hillairet

Belhaj

et al. 2022

Fusion Engineering and Design

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“…employed [13] the dyadic Green's function technique for computing the radiated electric field due to multipactor current in a coaxial geometry and found that a distortion in the rf field occurs within the gap due to multipactor. Later studies also showed [165–168] unwanted frequencies can be generated due to multipactor resulting in distortion of the rf signals.…”

Section: Recent Advances In Multipactor Prediction and Physicsmentioning

confidence: 99%

Recent advances in multipactor physics and mitigation

et al. 2023

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Recent progress made in the prediction, characterisation, and mitigation of multipactor discharge is reviewed for single‐ and two‐surface geometries. First, an overview of basic concepts including secondary electron emission, electron kinetics under the force law, multipactor susceptibility, and saturation mechanisms is provided, followed by a discussion on multipactor mitigation strategies. These strategies are categorised into two broad areas – mitigation by engineered devices and engineered radio frequency (rf) fields. Each approach is useful in different applications. Recent advances in multipactor physics and engineering during the past decade, such as novel multipactor prediction methods, understanding space charge effects, schemes for controlling multipacting particle trajectories, frequency domain analysis, high frequency effects, and impact on rf signal quality are presented. In addition to vacuum electron multipaction, multipactor‐induced ionization breakdown is also reviewed, and the recent advances are summarised.

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“…However, with increasing complexity in terms of geometry [3], [4], materials [5], [6], and surface finishing, achieving accurate multipactor simulations becomes a challenge. Modeling tools have seen large advances recently [7]- [9], and simulations with modulated signal [10], [11], space charge [12], multiple materials [13], [14], or simple noise characterization [15] are common nowadays. All of these advances in the simulation field are driving designers to request that their devices are tested against the same conditions that they were simulated-in terms of RF power, signal modulation, and temperature [16].…”

Section: Introductionmentioning

confidence: 99%

High Power RF Discharge Detection Technique Based on the In-Phase and Quadrature Signals

Monerris-Belda¹,

Marin²,

Jodar³

et al. 2021

IEEE Trans. Microwave Theory Techn.

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High power radio frequency (RF) breakdown testing is a subject of great relevance in the space industry, due to the increasing need of higher transmission power and smaller devices. This work presents a novel RF breakdown detection system, which monitors the same parameters as the microwave nulling system but with several advantages. Where microwave nulling-a de facto standard in RF breakdown testing-is narrowband and requires continuous tuning to keep its sensitivity, the proposed technique is broadband and maintains its performance for any RF signal. On top of that, defining the detection threshold is cumbersome due to the lack of an international standardized criterion. Small responses may appear in the detection system during the test and, sometimes, it is not possible to determine if these are an actual RF breakdown or random noise. This new detection system uses a larger analysis bandwidth, thus reducing the cases in which a small response is difficult to be classified. The proposed detection method represents a major step forward in high power testing as it runs without human intervention, warning the operator or decreasing the RF power automatically much faster than any human operator.

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Simple model of the rf noise generated by multipacting electrons

Cited by 16 publications

References 17 publications

Evaluation of multipactor thresholds for coaxial lines subject to surface conditioning for the WEST ion cyclotron antenna

Evaluation of multipactor thresholds for coaxial lines subject to surface conditioning for the WEST ion cyclotron antenna

Recent advances in multipactor physics and mitigation

High Power RF Discharge Detection Technique Based on the In-Phase and Quadrature Signals

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