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• W2068787064 endingPage "5263" @default.
• W2068787064 startingPage "5248" @default.
• W2068787064 abstract "Field emission cathodes fabricated using thin-film techniques and electron beam microlithography are described, together with effects obtained by varying the fabrication parameters. The emission originates from the tip of molybdenum cones that are about 1.5 μm tall with a tip radius around 500 Å. Such cathodes have been produced in closely packed arrays containing 100 and 5000 cones as well as singly. Maximum currents in the range 50–150 μA per cone can be drawn with applied voltages in the range 100–300 V when operated in conventional ion-pumped vacua at pressures of 10−9 Torr or less. In the arrays, current densities (averaged over the array) of above 10 A/cm2 have been demonstrated. Life tests with the 100-cone arrays drawing 2 mA total emission (or 3 A/cm2) have proceeded in excess of 7000 h with about a 10% drop in emission current. Studies are presented of the emission characteristics and current fluctuation phenomena. It is tentatively concluded that the emission arises from only one or a few atomic sites on the cone tips." @default.
• W2068787064 created "2016-06-24" @default.
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• W2068787064 date "1976-12-01" @default.
• W2068787064 modified "2023-10-11" @default.
• W2068787064 title "Physical properties of thin-film field emission cathodes with molybdenum cones" @default.
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• W2068787064 doi "https://doi.org/10.1063/1.322600" @default.
• W2068787064 hasPublicationYear "1976" @default.
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