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electron multiplier

e·lec·tron mul·ti·pli·er (plural e·lec·tron mul·ti·pli·ers)


noun 
Definition:
 
current amplification device: a device for amplifying a very small current using the effects of secondary emission. Electrons from the original current strike an anode, producing secondary electrons that are directed to the next anode in a multistage process until the desired level of current is obtained.

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