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The,,freshly,,sputtered,,chemically,,active,,cathode,,material,,acts,,as,,a,,getter,,that,,then,,evacuates,,the,,gas,,by,,both,,chemisorption,,and,,physisorption,,resulting,,in,,a,,net,,pumping,,action.,,Ion,,,pumps,,,are,,,commonly,,,used,,,in,,,ultra-high,,,vacuum,,,(UHV),,,systems,,,,as,,,they,,,can,,,attain,,,ultimate,,,pressures,,,less,,,than,,,1011,,,mbar.[1],,,In,,,contrast,,,to,,,other,,,common,,,UHV,,,pumps,,,,such,,,as,,,turbomolecular,,,pumps,,,and,,,diffusion,,,pumps,,,,ion,,,pumps,,,have,,,no,,,moving,,,parts,,,and,,,use,,,no,,,oil.,,,1.Permanent,,magnets,,2.Pump,,envelope,,3.Titanium,,cathodes,,4.Anode,,cell,,array,,5.Positive,,high,,voltage,,lead,,,,Standard,,Diode,,Pumps,,The,,main,,elements,,of,,a,,standard,,diode,,pump,,are,,a,,vacuum,,tight,,envelope,,,external,,magnets,,,and,,an,,element,,consisting,,of,,multiple,,anode,,cells,,and,,two,,cathodes.,,Noble,Diode,Pumps,use,one,titanium,and,one,tantalum,cathode,to,increase,pumping,speed,for,noble,gases.,1842,Sabre,Street,Hayward,,California,94545,Telephone:,800-962-2310,or,510-538-3304,Fax:,510-538-2889,Sales:,salesthermionics.com,Our,office,hours,are,from,8am,to,5pm,PST,,Monday,through,Friday.,Argon,ions,neutralized,via,glancing,collisions,with,a,sputter,cathode,impact,the,pump,wall,and,are,coated,with,sputtered,titanium.,At,,this,,point,,there,,is,,a,,significant,,difference.,,The,,pump,,was,,developed,,as,,an,,appendage,,pump,,for,,maintaining,,Ultra,,High,,Vacuum,,(UHV),,in,,microwave,,power,,tubes,,after,,processing,,,but,,soon,,after,,honeycomb-shaped,,anodes,,and,,commercial,,VacIon,,pumps,,with,,speeds,,of,,thousands,,of,,liters,,per,,second,,were,,produced.,,Archived,,from,,the,,original,,on,,May,,9,,,2006.,, 6704223018
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