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Träfflista för sökning "WFRF:(Lisak Mietek 1947 ) srt2:(2005-2009)"

Sökning: WFRF:(Lisak Mietek 1947 ) > (2005-2009)

  • Resultat 51-60 av 80
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51.
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54.
  • Semenov, V., et al. (författare)
  • Analytical description of the multipactor inside narrow waveguide iris
  • 2008
  • Ingår i: Proceedings of the 7th International Workshop “Strong microwaves: Sources and Applications, Nizhny Novgorod, Russia, July 27 – Aug. 2, 2008, Institute of Applied Physics, Russian Academy of Sciences. ; :paper T42, s. 144-
  • Konferensbidrag (refereegranskat)
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55.
  • Semenov, V.E., et al. (författare)
  • Conformal mapping analysis of multipactor breakdown in waveguide irises
  • 2008
  • Ingår i: Physics of Plasmas. - : AIP Publishing. - 1089-7674 .- 1070-664X. ; 15:3, s. 033501 1-8
  • Tidskriftsartikel (refereegranskat)abstract
    • Multipactor breakdown in a single waveguide iris is analyzed using the quasistatic approximation for the spatial distribution of the rf field in the iris. Based on the conformal mapping approach, an analytical description is given of the rf field structure in the iris. It is shown that in the central part of any iris with a length to height ratio greater than approximately 0.5, the rf field structure is close to that between two parallel plates. The multipactor threshold for the iris is determined mainly by electron losses from the central part of the iris where the losses are due to the tangential component of the emission velocity of secondary electrons. The effective length of the iris central part is determined and an estimate of the multipactor threshold for the iris is found in terms of the conventional parameters: Applied rf voltage, product of rf frequency and iris height, and iris length to height ratio. Numerical simulations are also carried out using the exact analytical description of the quasistatic rf field and taking into account a spread of electron emission velocities.
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57.
  • Semenov, V. E., et al. (författare)
  • Multipactor breakdown in waveguide irises
  • 2009
  • Ingår i: 2009 IEEE International Vacuum Electronics Conference, IVEC 2009; Rome; Italy; 28 April 2009 through 30 April 2009. - 9781424434992 ; , s. 321-322
  • Konferensbidrag (refereegranskat)abstract
    • A detailed analysis is made in order to establish the multipactor breakdown threshold in wave guide irises. The analysis involves an analytical investigation based on the conformal mapping technique and also extensive numerical simulations. Comparison with recent experimental results shows good agreement. The main goal of the work is to obtain multipactor charts for the iris, i.e. the breakdown voltage as a function of the frequency - gap product, for different height to width ratios of the iris.
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  • Resultat 51-60 av 80

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