WebIrving Langmuir invented the diffusion pump, using mercury as the pump fluid. The use of mercury enabled the pump to continue working at elevated temperatures, but was soon replaced due to its toxicity. By the 1920s, the oil-sealed rotary vane mechanism was the typical design for most primary pumps. WebFor vacuums in the range lO" mm Hg to 10 mm Hg, rotary mechanical pumps (oil pumps) are used and the pressure can be measured with a Vacustat McLeod type gauge. If still higher vacuums are required, for example for high vacuum sublimations, a mercury diffusion pump is suitable. Such a pump can provide a vacuum up to 10" mm Hg.
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Web3:00pm VT-TuA3 Simulation of a Large Linear Jet Mercury Diffusion Pump with the Test Particle Monte Carlo Method, Xueli Luo, T. Giegerich, C. Day, Karlsruhe Institute of Technology (KIT), Germany In current nuclear fusion research, the cryopump in various designs has become the standard solution for pumping the plasma chamber. However, Web@article{osti_5438585, title = {TFTR ultrahigh-vacuum pumping system incorporating mercury diffusion pumps}, author = {Sink, D. A. and Sniderman, M.}, abstractNote = {The TFTR vacuum vessel will have a system of four 61 cm diameter mercury diffusion pumps to provide a base pressure in the 10/sup -8/ to 10/sup -9/ Torr range as well as a low … hxi harmonic mixer
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Webto a two-stage mercury diffusion pump through a liquid nitrogen trap. Using a suitable optical system, light from regions a and b of the discharge (Fig. 1) illuminates respec ... WebMercury Diffusion Pump by Edwards High Vacuum Ltd., Crawley, West Sussex, England, 1960-1969 Details Category: Vacuum Technology Object Number: 1981-724 Materials: copper (alloy) , paint , plastic (unidentified) and steel (metal) Measurements: overall: 520 mm x 310 mm x 250 mm, 13.13kg type: pump - machinery taxonomy: furnishing and … Webdiffusion pump (or, more properly, vapor jet pump). Vacuum diffusion pumps are one of the oldest and most reliable ways of creating a vacuum down to 10-10 Torr, or even lower, at 25° C. The first designs of diffusion pumps go back to 1915, when the pump was invented by Irving Langmuir. The original diffusion pump fluid used was mercury, which ... mashle magic and muscles ch 1