Charge Neutrality

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Charge Neutrality

The approximate equality of positive and negative particles in high-density plasmas.
This phenomenon, which is sometimes called electrical neutrality, is a result of the extremely large electric space charge fields that would arise if the densities were not equal. Although the positive and negative charge densities are seldom exactly equal, their percentage difference is so small as to be negligible. It is not difficult to maintain this condition in an active plasma since ionization or recombination always produces or destroys an ion pair together.


This article is based on NASA's Dictionary of Technical Terms for Aerospace Use