Medical Definition of Secondary electron imaging

1. Production of secondary electrons is very topography related. Due to their low energy, 5eV, only secondaries that are very near the surface (less than 10nm) can exit the sample and be examined. Any changes in topography in the sample that are larger than this sampling depth will change the yield of secondaries due to collection efficiencies. Collection of these electrons is aided by using a collector in conjunction with the secondary electron detector. The collector is a grid or mesh with a +100V potential applied to it which is placed in front of the detector, attracting the negatively charged secondary electrons to it which then pass through the grid-holes and into the detector to be counted. When a Secondary Electrons collide with the solid-state semiconductor detector an electron-hole pairs are created which are then counted. This quantity is translated into a pixel intensity and displayed on the CRT, forming the image. (05 Aug 1998)



Secondary Electron Imaging Pictures

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Lexicographical Neighbors of Secondary Electron Imaging

secondary dementia
secondary dentin
secondary dentition
secondary deviation
secondary dextrocardia
secondary diagonal
secondary digestion
secondary disease
secondary drives
secondary drowning
secondary dysmenorrhea
secondary dysmenorrhoea
secondary education
secondary egg membrane
secondary electron
secondary electron imaging (current term)
secondary emission
secondary emissions
secondary encephalitis
secondary energy
secondary failure
secondary fermentation
secondary fissure of cerebellum
secondary follicle
secondary gain
secondary generalised epilepsy
secondary glaucoma
secondary haemorrhage
secondary homonym
secondary host

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