New method for detection of multipaction

Udiljak, R.; Anderson, D.; Ingvarson, P.; Jordan, U.; Jostell, U.; Lapierre, L.; Li, G.; Lisak, M.; Puech, J.; Sombrin, J.

doi:10.1109/tps.2003.811646

Cited by 42 publications

(15 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, we want to make some remarks on the thirdharmonic technique for multipactor detection [4], [11]. In the case of multipactor order N = 1, the mentioned third harmonic coincides indeed with the m = 3 harmonic, being detected at a frequency three times higher than the RF one.…”

Section: Resultsmentioning

confidence: 99%

“…Multipactor dissipates power, loads cavities, degrades components, increases system noise level, and generates undesirable harmonics [3], [4]. As it is well known, multipactor occurs when a harmonic electric field exists in a parallel-plate region, which accelerates the electrons from one surface to the other.…”

Section: Introductionmentioning

confidence: 99%

“…However, the problem of the radiated power by a multipactor discharge has not been studied in detail. Such problem is very important from a practical point of view, because the noise created by a discharge is a method typically used to experimentally detect the phenomenon (third-harmonic detection technique) [4], [10], [11]. From a qualitative point of view, the total radiated power of an electron can be estimated by means of the Larmor formula, which states that such power is proportional to the square of the electron acceleration [4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Analytical Model to Evaluate the Radiated Power Spectrum of a Multipactor Discharge in a Parallel-Plate Region

Sorolla

Anza

Gimeno

et al. 2008

IEEE Trans. Electron Devices

View full text Add to dashboard Cite

Abstract-This paper is aimed at studying the electromagnetic radiation pattern of a multipactor discharge occurring in a parallel-plate waveguide. The proposed method is based on the Fourier expansion of the multipactor current in terms of timeharmonic currents radiating in the parallel-plate region. Classical radiation theory combined with the frequency domain Green's function of the problem allows the calculation of both the electric and the magnetic radiated fields. A novel analytical formula for the total radiated power of each multipactor harmonic has been derived. This formula is suitable for predicting multipactor with the third-harmonic technique. The proposed formulation has been successfully tested with a particle-in-cell code.Index Terms-Microwave discharges, multipactor effect, parallel-plate waveguide, radiated power, third-harmonic detection technique.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Analytical Model to Evaluate the Radiated Power Spectrum of a Multipactor Discharge in a Parallel-Plate Region

Sorolla

Anza

Gimeno

et al. 2008

IEEE Trans. Electron Devices

View full text Add to dashboard Cite

show abstract

“…In addition, the current multipactor detection methods do not allow one to determine the nature of the multipactor discharge. 5,14,15 In Ref. 16, numerical results of electron population growth for multicarrier signals and infinite parallel plates are presented, but no accumulation is reported.…”

Section: Introductionmentioning

confidence: 99%

Long-term multipactor discharge in multicarrier systems

et al. 2007

View full text Add to dashboard Cite

A new mechanism of long-term multipactor in multicarrier systems is studied employing both analytical and numerical methods. In particular, the investigation is focused on the impact that a realistic secondary emission yield at low energies produces on the development of long term multipactor. A novel analytical model for this interperiod charge accumulation is presented using the traditional multipactor theory for parallel plates, and approximating the multicarrier signal as a single-carrier signal modulated by a pulsed signal envelope. The analytical predictions are verified by numerical simulations for a typical rectangular waveguide. The analytical and numerical results demonstrate that the susceptibility of the system to develop a long-term multipactor discharge increases with higher values of low-energy secondary emission yield.

show abstract

“…If the resonant condition between the motion of the electrons and the RF signal is maintained and the secondary-electronyield (SEY) coefficient is higher than one when colliding with the plates, an electron avalanche builds-up and multipactor breakdown arises. The electron cloud loads the RF cavities, increasing the system noise level and the return loss, generating undesirable harmonics 4 and creating a local augmentation of the temperature that may severely damage or destroy internal components, what would be fatal.…”

mentioning

confidence: 99%

Multipactor saturation in parallel-plate waveguides

Sorolla

Mattes

2012

Physics of Plasmas

View full text Add to dashboard Cite

The saturation stage of a multipactor discharge is considered of interest, since it can guide towards a criterion to assess the multipactor onset. The electron cloud under multipactor regime within a parallel-plate waveguide is modeled by a thin continuous distribution of charge and the equations of motion are calculated taking into account the space charge effects. The saturation is identified by the interaction of the electron cloud with its image charge. The stability of the electron population growth is analyzed and two mechanisms of saturation to explain the steady-state multipactor for voltages near above the threshold onset are identified. The impact energy in the collision against the metal plates decreases during the electron population growth due to the attraction of the electron sheet on the image through the initial plate. When this growth remains stable till the impact energy reaches the first cross-over point, the electron surface density tends to a constant value. When the stability is broken before reaching the first cross-over point the surface charge density oscillates chaotically bounded within a certain range. In this case, an expression to calculate the maximum electron surface charge density is found whose predictions agree with the simulations when the voltage is not too high. V C 2012 American Institute of Physics.

show abstract

New method for detection of multipaction

Cited by 42 publications

References 4 publications

An Analytical Model to Evaluate the Radiated Power Spectrum of a Multipactor Discharge in a Parallel-Plate Region

An Analytical Model to Evaluate the Radiated Power Spectrum of a Multipactor Discharge in a Parallel-Plate Region

Long-term multipactor discharge in multicarrier systems

Multipactor saturation in parallel-plate waveguides

Contact Info

Product

Resources

About