On behalf of the University of Victoria CEOS developed together with Hitachi a corrector for chromatic and spherical aberration in a STEM. Currently CEOS is working on optimising resolution.
More information about this project can be found on the pages of the University of Victoria, especially in the section "A little bit about technology" of the HF-33XX tab.
A Corrector for spherical aberraton in the case of an acceleration voltage as high as 1.2 MV was designed. It will presumably be implemented in 2013. Its purpose is to permit holographic observation of quantum phenomena. Further information can be found here .
CEOS is working on the correction of chromatic, spherical and coma-aberration in a TEM together with Zeiss on behalf of the University of Ulm. The voltage applied can be varied from 20 to 80 kV. Construction has been finished, the corrector will be engineered soon. Follow the link to the website of this project.
CEOS is investigating the possibilities offered by using phase plates in electron microscopes together with Karlsruhe Institute of Technology (KIT) and Bioquant in Heidelberg. Phase contrast of weak objects in transmission can be strongly improved. We present a discussion of the questions involved in our basics. Informations about application and manufacturig of these phase plates can be found here. Please notice the second of the presentations mentioned there: Einfluss von Phasenplatten auf Kontrasttransfer in Cs-korrigiertem TEM.
CEOS developed a purely elektrostatic Cc/Cs-corrector. It could be shown that correcting chromatic and spherical aberration in a ion optical column significantly improves resolution.
Within the TEAM project CEOS has developed a magnetic/electrostatic Cc/Cs- corrector for a transmission electron microscope. It has been placed at the disposal of the scientific community at the user facility of NCEM in october 2009. There scientists are allowed to use it for their own purposes.
A further C-COR was put in operation in Jülich within the scope of the Pico project .
On behalf of the University of Victoria CEOS built an aplanatic corrector of the hexapole type. Correcting the spherical and off-axial coma aberration allows for an enlarged high-resolution field of view within the ccd camera. Further information can be found on this poster.
This corrector will be implemented into the same microscope as the S-CCOR mentioned above.
Applying correction in electron microscopes offers a variety of possibilities for development. Many restrictions, so far necessary for achieving high resolution, can now be dismissed. This applies to high acceleration voltages, strong objective lenses or the small energy width of the beam. Abandonment of these restrictions offers new prospects for the users.