CHINESE JOURNAL OF PHYSICS VOL. 38, NO. 2-I APRIL 2000

High Voltage and High Current Density Objective Lens

A. S. A. Alamir

Department of Physics, Assiut University, Assiut, Egypt
(Received June 29, 1999)

Iron-free objective focal properties have been computed as a function of the current density, which is the limiting factor. Practical lenses with of low aberration coefficients have been suggested for use in high resolution and high voltage electron microscopes.

PACS. 41.80.-p - Beam optics.

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