virtual cathode

virtual cathode

[′vər·chə·wəl ′kath‚ōd]
(electronics)
The locus of a space-charge-potential minimum such that only some of the electrons approaching it are transmitted, the remainder being reflected back to the electron-emitting cathode.
References in periodicals archive ?
A virtual cathode is produced in this device by a nonthermal electron plasma confined in a modified-geometry Penning trap.
This volume of cells, known as the virtual cathode for that shock, initiates electric stimulation of the rest of the heart.
Using the bidomain model and fluorescent dye methods, the Vanderbilt team predicted that there would be an excessively positive, or hyperpolarized, area on either side of the virtual cathode.
Full browser ?