Deflection beam-chopping in the SEM

A. Gopinath, M. S. Hill

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Beam-chopping in the scanning electron microscope (SEM) by electrostatic deflection over an aperture is examined in some detail. The chopping aperture used is the final aperture image and the beam is of finite diameter. The required deflection angle to cut off the beam and the apparent movement of the spot due to the deflection in chopping are obtained for the cases of the deflection structure placed between the gun and the top lens and between the gun and the other lens.

Original languageEnglish (US)
Article number014
Pages (from-to)229-236
Number of pages8
JournalJournal of Physics E: Scientific Instruments
Issue number3
StatePublished - Dec 1 1977


Dive into the research topics of 'Deflection beam-chopping in the SEM'. Together they form a unique fingerprint.

Cite this