6533b820fe1ef96bd127a3c9
RESEARCH PRODUCT
Enhancement of the Multipactor Threshold Inside Nonrectangular Iris
Eden SorollaBenito GimenoDaniel Gonzalez-iglesiasE.i. RakovaO. MonerrisJérôme PuechV. E. SemenovJacques Sombrinsubject
010302 applied physicsPhysicsField linebusiness.industryField effectConformal mapElectron01 natural sciences010305 fluids & plasmasElectronic Optical and Magnetic Materials[SPI.TRON]Engineering Sciences [physics]/ElectronicsCross section (physics)Wavelengthmedicine.anatomical_structureOptics0103 physical sciencesmedicineRadio frequencyElectrical and Electronic EngineeringIris (anatomy)businessComputingMilieux_MISCELLANEOUSdescription
Multipactor breakdown is studied inside the capacitive iris of a rectangular waveguide with a skewed slot along its longitudinal cross section. Both the iris length and height are assumed to be small compared to the electromagnetic wavelength. Therefore, the quasi-static approximation is applied so as to describe the RF field distribution inside the iris gap, whereas a 2-D model is used to analyze the electron motion. The peculiarities of RF field structure are studied using the conformal mapping approach, which shows that the electric field lines can be approximated by circular arcs when the iris length is much larger than its height. The electron motion inside the iris gap is analyzed using different analytical approaches as well as numerical simulations. The simplest analytical consideration is based on the general theory of multipactor between curved surfaces. Within the more sophisticated model, the fringing field effect on electron motion inside the iris is calculated assuming circular structure of electric field lines. It is demonstrated within all approaches that the electron losses within the iris gap increase considerably with the skew angle, deviating from the rectangular iris shape. As a result, the multipactor becomes impossible at a relatively small value of this angle.
year | journal | country | edition | language |
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2018-03-01 |