Abstract: | We analyze the saturation mechanism of a vacuum resonance microwave discharge (multipactor) where the decelerating electrostatic
field returns electrons to the secondary-emission multiplying surface. It is found that the Coulomb defocusing of electron
bunches prevails over their microwave focusing (toward the resonance phase of the field) in the stationary state, making it
possible to extract superfluous secondary electrons when the electron bunches are reproduced on the discharge surface. Using
this model, we determine the main characteristics of this multipactor, such as the magnitude and phase disposition of the
resonant electron bunch. An explanation of the increase in the discharge power with increase in the secondary-emission coefficient
is given.
Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia. Translated from Izvestiya Vysshikh
Uchebnykh Zavedenii, Radiofizika, Vol. 42, No. 11, pp. 1097–1104, November, 1999. |