1. A glow discharge cell comprising:an electrically conductive cylindrical vessel having a first end and a second end, and a plurality of holes or slots in an exterior wall;
a hollow electrode aligned with a longitudinal axis of the cylindrical vessel and extending at least from the first end to an interior of the cylindrical vessel, wherein the hollow electrode has an inlet and an outlet;
a first insulator that seals the first end of the cylindrical vessel around an outlet aligned with the longitudinal axis of the cylindrical vessel;
a cylindrical screen disposed within the cylindrical vessel that connects the hollow electrode to the outlet in the first insulator;
a second insulator that seals the second end of the cylindrical vessel around the hollow electrode and maintains the substantially equidistant gap between the cylindrical vessel and the hollow electrode;
a non-conductive granular material disposed within the substantially equidistant gap, wherein (a) the non-conductive granular material allows an electrically conductive fluid to flow between the cylindrical vessel and the hollow electrode, and (b) the combination of the non-conductive granular material and the conductive fluid prevents electrical arcing between the cylindrical vessel and the hollow electrode during an electric glow discharge; and
wherein: (1) the electric glow discharge is created whenever (a) the glow discharge cell is connected to a DC electrical power supply such that the cylindrical vessel is an anode and the hollow electrode is a cathode, and (b) the electrically conductive fluid is introduced into the gap, and (2) the cathode heats up during the electric glow discharge.