Beam pulsing device for use in charged-particle microscopy

E.R. Kieft (Inventor), F.B. Kiewiet (Inventor), A. Lassise (Inventor), O.J. Luiten (Inventor), P.H.A. Mutsaers (Inventor), E.J.D. Vredenbregt (Inventor), A. Henstra (Inventor)

Research output: PatentPatent publication

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Abstract

A charged-particle microscope comprising: - A charged-particle source, for producing a beam of charged particles that propagates along a particle-optical axis; - A sample holder, for holding and positioning a sample; - A charged-particle lens system, for directing said beam onto a sample held on the sample holder; - A detector, for detecting radiation emanating from the sample as a result of its interaction with the beam; - A beam pulsing device, for causing the beam to repeatedly switch on and off so as to produce a pulsed beam, wherein the beam pulsing device comprises a unitary resonant cavity disposed about said particle-optical axis and having an entrance aperture and an exit aperture for the beam, which resonant cavity is embodied to simultaneously produce a first oscillatory deflection of the beam at a first frequency in a first direction and a second oscillatory deflection of the beam at a second, different frequency in a second, different direction. The resonant cavity may have an elongated (e.g. rectangular or elliptical) cross-section, with a long axis parallel to said first direction and a short axis parallel to said second direction.
Original languageEnglish
Patent numberEP2722865
Publication statusPublished - 22 Oct 2012

Bibliographical note

Also published as:
US2014103225 (A1)

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    Kieft, E. R., Kiewiet, F. B., Lassise, A., Luiten, O. J., Mutsaers, P. H. A., Vredenbregt, E. J. D., & Henstra, A. (2012). Beam pulsing device for use in charged-particle microscopy. (Patent No. EP2722865).