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Electron Optics: aberration correction of electron lenses


The resolution in many  electron optical applications is limited by lens aberrations. These can in principle be compensated by electron mirrors.  We are in the process of building an aberration-corrected photoemission electron microscope.
Its beam line is shown on the right.

 
  beamline
Projection  images of a square mesh obtained with an uncorrected electron lens system (top) and with a mirror-corrected system (bottom). No distortions are noticeable in the aberration corrected case.
G. Rempfer et al., Microsc. Microanal. 3, 14 (1997)


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Portland State University - Physics Department