Abstract
A versatile low energy electron gun suitable for electron-atom scattering experiments has been designed utilizing photoetched grids and precision ceramic spacers which stack onto ceramic rods. Diagnostic techniques are described which determine the absolute electron energy to within ±0.1 eV. Electron guns which operate over the energy range 0.1–25 eV with currents up to 10 mA and energy spreads as low as 0.2 eV have been built using the design presented here.
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