SLOW OSCILLATIONS OF THE POTENTIAL IN ELECTRON-ION FLUXES NEAR THE EMITTER (O MEDLENNYKH KOLEBANIYAKH POTENTSIALA V ELEKTRONNOIONNYKH POTOKAKH VBLIZI EMITTERA),
Abstract
An investigation was made of quasistationary distributions of the potential in unidimensional ion-electron flows close to an emitting plane. The role of close collisions is disregarded. Three modes are found; they are unstable with regard to slow variations and boundary conditions. Instability appears as a result of counterflow of slow particles reflected to the emitter by potential barriers in the Debye layer close to the emitter. Instabilities of the first and second type due to the absence of steady-state modes in conditions close to the emitter develop during a time interval of the order of the inverse of the plasma frequency so that the number of reflected particles involved in counterflow is comparable to the total number of particles. An instability of the third type appears in the distributions of the potential when the slow particles emerging from the emitter are first accelerated and only then are attenuated and are reflected to the emitter. A form of an approximate system of equations is established for the case of slow oscillations of time-variable boundary conditions, and solutions of this system are studied. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 28, 1967
- Accession Number
- AD0673934
Entities
People
- V. M. Smirnov
Organizations
- National Air and Space Intelligence Center