The environmental scanning electron microscope and its applications.

摘要: An environmental scanning electron microscope can be made by incorporating a pressure limiting aperture at some distance below the objective of an SEM, and providing independent pumping between these two apertures. Tilting with respect to axis optics column redirects gas jet which develops above otherwise would inject excessive through into column. The detection backscattered multiple-backscattered electrons is achieved in region confined sample, detector grid. Wet specimens examined 7kV TV rates placing them sufficiently close aperture. Live seedlings ants have been observed this way. (fresh) rat tissues, wool fibers subjected various treatments, crystallization rewetting salts, radiation effects recorded under microscope. Examination full range, 0-1013 mbar, possible. A detector-aperture system will allow signal originating from sample detected simultaneously both construction. Further development microscopy now depends upon co-ordination manufacturers research groups involved such fields as biology, fiber technology, physical chemistry.