Why Is It Called a Dynode?

The dynode takes its name from the dynatron. Albert Hull did not use the term dynode in his 1918 paper on the dynatron, but used the term extensively in his 1922 paper. In the latter paper, he defined a dynode as a "plate that emits impact electrons ... when it is part of a dynatron."

What is meant by dynode?

: an electrode in an electron tube that functions to produce secondary emission of electrons.

What is dynode made of?

The dynode is made of a metal plate containing a substance on the surface such as a bialkali compound, which emits secondary electrons upon impact with accelerated electrons. The acceleration of the photoelectrons and the impact of these on the dynode produce multiple secondary electrons.

Sarah Jenkins

Sarah Jenkins

Senior Technology Editor & AI Specialist

Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.