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Measurement of the energy and mass-charge composition of the ion flux of the vacuum spark on a tungsten cathode coated with fuzz nanostructures

The spark discharge was burned by applying a pulse of 20 kV, 50 ns to the anode. Distance cathode-anode was 30–20 microns. Measurements were taken in several series of 100 pulses. For each position of the cathode, three series of 100 pulses were performed. This design of the spectrometer differs from the previously used one by the presence of a plasma disruption system with additional acceleration of the ion component by 200 eV. As a result of the measurements performed, it can be unambiguously indicated that during the first few tens of discharges on the FUZZ surface, the flow contains mainly hydrogen ions and impurities.