dynode

[dahy-nohd]

noun Electronics.

an electrode for the emission of secondary electrons in a vacuum tube.

Origin of dynode

First recorded in 1935–40; dyn(a)- + -ode²

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British Dictionary definitions for dynode

dynode

noun

an electrode onto which a beam of electrons can fall, causing the emission of a greater number of electrons by secondary emission. They are used in photomultipliers to amplify the signal

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

dynode in Science

dynode

[dī′nōd′]

An electrode used in certain electron tubes, especially photomultipliers, to provide secondary emission. Dynodes are arranged by increasing voltage between the cathode and anode of the tube, each attracting the cascade of electrons from the one behind it, and releasing more electrons to the next.