Pressurized 1-MeV Electron Accelerator of the Twin-Tank Design for Electron Microscopy

A pressurized l-MeV electron accelerator was developed after the principle of the symmetrical cascade generator with fully electronic ac supply and voltage regulating systems. A special feature of the new commercial model is the twin-tank design in which the high voltage generator and the accelerator are separated from each other in individual tanks. The two units are connected by a high-ohmic resistor which is enclosed in a pressurized connecting tube. The ripple voltage is negligible (1 ?? 10-7) and the overall voltage stability is between 1 ?? 10-6 and 1 ?? 10-5 in the voltage range from 100 kV up to 1 MV. The electron accelerator is designed as a production model for the supply of a commercial l-MeV electron microscope.