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- W3036359823 abstract "We have completed development of a 200kV field emission TEM. Fig. 1 is a general view of the instrument showing the electron gun and illumination lens system. The electron gun is reported in a separate paper in details. The high voltage accelerator is of 6-stage with aluminum oxide insulators. It allows stable 200kV operation achieving a voltage stability of 1.5 х 10 −6 /min. The field emitter is a polished tungsten tip having a crystal orientation of (310). It is operated at an ambient temperature without heating. The illumination lens system has been designed and built with permalloy to suite the small virtual source and to minimize external magnetic field disturbances. The objective lens has been designed to allow a point resolution of 0.23 nm and a small probe of 1 nm diameter. The probe has an intensity of 1 х 10 9 A/cm 2 sr. or higher as measured on the specimen." @default.
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- W3036359823 date "1989-08-06" @default.
- W3036359823 modified "2023-09-25" @default.
- W3036359823 title "Development of a 200kV field emission TEM" @default.
- W3036359823 cites W2188631329 @default.
- W3036359823 doi "https://doi.org/10.1017/s0424820100152537" @default.
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