CHARGED-PARTICLE MICROSCOPE WITH EXCHANGEABLE POLE PIECE EXTENDING ELEMENT
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United States of America Patent
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Aug 22, 2017
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Aug 25, 2016
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Abstract
A charged-particle microscope having a vacuum chamber comprises a specimen holder, a particle-optical column, a detector and an exchangeable column extending element. The specimen holder is for holding a specimen. The particle-optical column is for producing and directing a beam of charged particles along an axis so as to irradiate the specimen. The column has a terminal pole piece at an extremity facing the specimen holder. The detector is for detecting a flux of radiation emanating from the specimen in response to irradiation by the beam. The exchangeable column extending element is magnetically mounted on the pole piece in a space between the pole piece and the specimen holder. Methods of using the microscope are also disclosed.
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