FIELD: electricity.
SUBSTANCE: between electrodes with fixed distance between them voltage is supplied, the arising current melts and evaporates a thin wire, which is located between electrodes, the distance from the cathode to the anode is selected such that the discharge without the wire will not occur spontaneously, and between electrodes conditions are created for avalanche breakdown of a discharge gap arising in case there are vapours of the evaporating wire in air. At the same time the section around the wire and cathode surface is surrounded with a dielectric, and as voltage is supplied to a discharge gap in the section of the cathode surface limited with the dielectric, the energy is concentrated, which locally heats this section of the cathode surface.
EFFECT: local heating of a cathode section in scientific research.
3 dwg
