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Qu'est-ce (qui) est dynode - définition
AN ELECTRODE IN A VACUUM TUBE THAT SERVES AS AN ELECTRON MULTIPLIER THROUGH SECONDARY EMISSION
dynode
['d??n??d]
¦ noun Electronics an intermediate electrode which emits additional electrons in a photomultiplier or similar amplifying device.
Origin
1930s: from Gk dunamis 'power' + -ode2.
Dynode
A dynode is an electrode in a vacuum tube that serves as an electron multiplier through secondary emission. The first tube to incorporate a dynode was the dynatron, an ancestor of the magnetron, which used a single dynode.
Wikipédia
Dynode
A dynode is an electrode in a vacuum tube that serves as an electron multiplier through secondary emission. The first tube to incorporate a dynode was the dynatron, an ancestor of the magnetron, which used a single dynode. Photomultiplier and video camera tubes generally include a series of dynodes, each at a more positive electrical potential than its predecessor. Secondary emission occurs at the surface of each dynode. Such an arrangement is able to amplify the tiny current emitted by the photocathode, typically by a factor of one million.
