CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Conformal mapping analysis of multipactor breakdown in waveguide irises

V.E. Semenov ; E. Rakova ; Richard Udiljak (Institutionen för radio- och rymdvetenskap, Icke-linjär elektrodynamik) ; Dan Anderson (Institutionen för radio- och rymdvetenskap, Icke-linjär elektrodynamik) ; Mietek Lisak (Institutionen för radio- och rymdvetenskap, Icke-linjär elektrodynamik) ; J. Puech
Physics of Plasmas (1070-664X). Vol. 15 (2008), p. 033501 1-8.
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2008-06-10. Senast ändrad 2013-05-03.
CPL Pubid: 71573

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för radio- och rymdvetenskap, Icke-linjär elektrodynamik (2005-2010)

Ämnesområden

Fusion, plasma och rymdfysik

Chalmers infrastruktur