Power capacity is a function of several variables: cathode area, air availability, porosity, and the catalytic value of the cathode surface.

The electrons have zero velocity at the cathode surface.

These monomers are then polymerized on the cathode surface, or some other surface placed in the apparatus by different mechanisms of which details are discussed below.

For temperature limited flow every electron that obtains enough energy to escape from the cathode surface is emitted, assumimg the acceleration potential of the electron gun is large enough.

A high voltage electric field (commonly 25,000 to 50,000 volts) formed between exposed charged anode and cathode surfaces is capable of inducing airflow through a principle referred to as ionic wind.

A repulsive ring placed between them focuses the electrons onto a small spot on the anode at the expense of a lower extraction field strength on the cathode surface.

Breakdown voltage can also differ from the Paschen curve prediction for very small electrode gaps when field emission from the cathode surface becomes important.

To keep the discharge going on, free electrons must be created at the cathode surface.

Squinting in one end of the big tube, he turned the tool until the cathode surface brightened slightly.

Polysulfides are reduced on the cathode surface in sequence while the cell is discharging: