Using concentric cylinder electrodes, observations were made on negative corona in hydrogen, argon, and nitrogen at pressures between 1 and 10 cm. of mercury. Positive ions produced by X-rays passing through argon in the corona chamber produced no measurable secondary effects at potentials below onset. Currents maintained by photo emission from the cathode became unstable at a potential near but definitely below onset.
Proceedings of the Iowa Academy of Science
©1942 Iowa Academy of Science, Inc.
Pinney, L. E.
"Some Effects Associated with Negative Corona Onset,"
Proceedings of the Iowa Academy of Science, 49(1), 382-382.
Available at: https://scholarworks.uni.edu/pias/vol49/iss1/71