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300 kV Transmission electron microscopes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| These are microscopes used in advanced materials
research and for the most advanced biological applications. The high accelerating
voltage improves the resolution to enable resolution of individual rows
of atoms, increases the penetration of thick or dense samples and increases
the electron intensity in the focused beam used for analysis or Z-contrast
STEM imaging.
Apart from giving superb images at a wide range of magnifications and having powerful facilities for electron diffraction studies, these TEMs are often equipped with analytical spectrometers for X-ray analysis and in-column or post-column electron energy spectroscopy and energy filtered imaging. The material research models of the 300 kV series can produce an intense focused beam of less than 0.5 nm size. This capability combined with the high electron intensity achieved with a field emission gun results in a powerful system for sub-nanometer analysis and ultrahigh resolution HAADF STEM images. All these microscopes can be equipped with a range of polepieces permitting the user to choose an optimum configuration depending on applications. The specifications on resolution and magnification given below are all based on the high resolution versions.
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