Hello, I am looking for help on negative ion generator calculations for an electrohydrodynamic thrust project. The project requires knowing the number of ions generated per second by the electrode, in order to find the net charge per volume of ionized fluid per second. The fluid is simply air. Any equations or physics laws around this would be extremely appreciated!

 

If you assume that each electron emitted from the electrode generates 1 ion, then you can determine the number of ions by measuring the electrode current.
One coulomb is equal to ≈6.24 x E18 electrons (1 ampere = one coulomb per second).