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- W2072775333 abstract "In order to improve the emission stability of the Ir-coated dispenser cathode under ion bombardment, a fine-grained tungsten top layer was applied on the substrate porous tungsten plug before Ir coating. The emission characteristics were studied after being assembled in a CRT gun. Cathode current was measured under pulse operation in a range of 0.1–9% duty. Remarkable anti-ion bombardment characteristics were observed over the range of 1–6% duty. The improved cathode showed 1.5 times higher emission current than that of a conventional Ir-coated dispenser cathode at 4% duty. AES analysis showed that the recovering rates of surface Ba and O atoms after ion bombardment were 2.5 times higher. From these results it is confirmed that the Ir coated cathode with a fine-grained tungsten top layer is provided with a good tolerance against the ion bombardment." @default.
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- W2072775333 date "1997-02-01" @default.
- W2072775333 modified "2023-09-24" @default.
- W2072775333 title "Emission characteristics of dispenser cathodes with a fine-grained tungsten top layer" @default.
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- W2072775333 doi "https://doi.org/10.1016/s0169-4332(96)00693-9" @default.
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