Physics/ionizing air measurements
would an electroscope be useful in detecting air ionization from a negative ion ionizer? if i put it near the output of the ionizer would some of the negative ions transfer their charge to the rod and leaves. i just am not sure if there is a reason for the ions to do so as the electroscope terminal is not grounded and as soon as a few impart a charge the rest will be repelled away. maybe i could use a metal tube connected to the electroscope terminal and blow the ionized air through the tube using the feraday ice pale effect to build up charge?
I have found many web sites that discuss the use of an electroscope to detect positively ionized air. I will list some below. The electroscope is initially given a negative charge. The electroscope indicates the presence of positively ionized air by discharging much faster than it otherwise would. The positively ionized air discharges the electroscope by accepting electrons.
I can't think of any reason that negatively ionized air would not donate electrons to a positively charged electroscope. However, I have not confirmed it. (The 3rd link in the list below takes you to a site that does vaguely indicate that it could work both ways.)
The web sites that I found:
I hope this helps,