focusing electrode

focusing electrode

[′fō·kəs·iŋ i‚lek‚trōd]
(electronics)
An electrode to which a potential is applied to control the cross-sectional area of the electron beam in a cathode-ray tube.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Recoil protons pass from the decay zone through a cylindrical time-of-flight electrode and are focused onto the MCP by spherical focusing electrodes. These are each set at about 18 kV to 20 kV and the combined system is cylindrically symmetric about an axis normal to the MCP.