What is the main physical mechanism behind the generation of negative ions in air by a high negative voltage electrode ?
Asked
Active
Viewed 23 times
1
-
2Well, the main mechanism is attaching an electron to a neutral molecule... Can you be a little more specific about what you want to understand? This is a pretty broad question. – Jon Custer Oct 21 '15 at 18:16
-
@JonCuster: what is the physical mechanism in order to generate free electrons? I like to understand the physics in order to design an ionizer. – Ramin IJ Oct 21 '15 at 20:03
-
3Field emission from the electrode would be one good bet. And, if you get one free electron in a strong field you likely will get avalanche effects, multiplying the number of free electrons. One search term is 'corona current'. – Jon Custer Oct 21 '15 at 20:07