worked was not understood at the time. de forest's initial audions did not have a high vacuum and developed a blue glow at modest plate voltages; de forest improved the vacuum for federal telegraph. [ ] by , vacuum tube operation was understood, and regenerative circuits using high vacuum tubes were...
variety of deposition techniques where solid metal vaporizes in a high vacuum environment. the most common of these pvd coating processes are evaporation (typically using cathodic arc or electron beam sources), and sputtering (using magnetic enhanced sources or "magnetrons", cylindrical or hollow cathode...
variety of deposition techniques where solid metal vaporizes in a high vacuum environment. the most common of these pvd coating processes are evaporation (typically using cathodic arc or electron beam sources), and sputtering (using magnetic enhanced sources or "magnetrons", cylindrical or hollow cathode...
approx. w/cm uv-spectrum – nm (ozone free and special spectra on request) standard version ready to use compact table unit with uv tubes, hg. massive, elliptical aluminium half reflectors. easy replaceable facetted aluminium mirrors. intensive air cooling. teflon coated, endless, glass fibre conveyor...