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- Title
Collisionless self-consistent trapping of electrons into a nonstationary potential well: Dynamics of trapped electrons.
- Authors
Kuznetsov, V. I.; Ender, A. Ya.; Kuhn, S.
- Abstract
The subject of investigation is the early stage of self-consistent trapping of electrons into a potential well that forms during the development of aperiodic Pierce instability. An analytical estimate for threshold gap δth = d th/λD (λD is the Debye beam length) above which the trapping begins is derived. The nonlinear dynamics and distribution function of trapped electrons are studied in detail using a numerical method (( E, K) code). It is found that the trapped particles produce a localized steep-edge bunch, which “dangles” around between the electrodes, causing potential oscillations. Trapped electrons render the well shallower. Some of the particles in the bunch are shown to periodically escape to the electrodes. As a result, the potential oscillation amplitude fades away and the mean depth of the well increases.
- Subjects
ELECTRON capture; COLLISIONLESS plasmas; PARTICLE beam instabilities; ELECTRODES; OSCILLATIONS; FIELD theory (Physics)
- Publication
Technical Physics, 2006, Vol 51, Issue 10, p1257
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784206100021