The mechanism of development of a cathode spot of a vacuum arc

The obtained value of velocity potential (φ) within the range 4⩽φ⩽6 corresponds to the microstream development and the following explosion which can be calculated exactly for the moment of the explosion, and can be measured experimentally as well in the development of a cathode spot in vacuum arcs. Experimental values of φ for different metals are within the range 4-6 V which corresponds to the authors´ results. As appears, from the estimates received and the following estimates, inertness of the liquid in certain local regions is not an obstacle for superfast hydrodynamic processes. Corresponding hydrodynamic disturbances will lead to an appearance of one or several special protuberances on the film. At heavy unevenness on the film, the theory given above loses its power (it is obvious from the comparison of times) and it is necessary in this case to research a new model of the process