Металлопористые катоды, модифицированные наноуглеродом, с высокой долговечностью для применения в приборах СВЧ

The results of calculations of the physical and energy parameters of nanocarbon structures with components of the active substance of the dispenser cathode, which are in good agreement with experience, are presented. It was experimentally determined that the active substance modified by the sulfoadduct of carbon nanoclusters has an evaporation rate of 1.5 times lower than the typical one. Tests of cathodes modified by nanocarbon as part of space-based TWTs showed a durability of 1740800 hours with a current density of 0.645 A / cm2.

Токоперехватывающие сетки из анизотропного пиролитического графита в электронных пушках с металлопористым катодом

Presented the results of experimental researches of anisotropic pyrolitic graphite application as a grid structure in high-power devices with the dispenser cathode. The emission characteristics of molybdenum, hafnium and anisotropic pyrolitic graphite in diodes and electron guns versus high-power electron flow, dissipated on test specimen and cathode temperature are given in the article. Also the grid structures made of anisotropic pyrolitic graphite are able to dissipate power of the electron flow 20 times more than grids made of molybdenum and 9 times more than grids made of hafnium without occurrence of spurious thermionic emission are shown in the article.