Abstract: A scintillation detection unit for the detection of back-scattered electrons for electron and ion microscopes having a column with longitudinal axis, in which the scintillation detection unit consists of body and at least one system for processing the light signal comprising a photodetector or a photodetector preceded with additional optical members where the body is at least partly made of scintillation material and is at least partly situated in a column of an electron or ion microscope and is made up of at least one hollow part. The height of the body of scintillation detection unit measured in the direction of longitudinal axis is greater than one-and-a-half times the greatest width measured in the direction perpendicular to the longitudinal axis of the hollow part with the greatest width.

Abstract: A material analysis method by a focused electron beam and an equipment for performing such an analysis where an electron map B is created describing the intensity of emitted back-scattered electrons at various points on a sample, and a spectral map S is created describing the intensity of emitted X-rays at points on the sample depending on the radiation energy. For selected chemical elements, X-ray maps Mi are created representing the intensity of X-rays characteristic for such elements. The X-ray maps Mi and the electron map B are converted into differential X-ray maps Di, which are subsequently merged into a final differential X-ray map D. The final differential X-ray map D is then used to search particles. Subsequently, a cumulative X-ray spectrum Xj is calculated for each particle and subsequently the classification of particles based on the peak intensities and the intensity of back-scattered electron is performed.

Abstract: The present invention deals with a secondary electron detector (1), especially in a scanning electron microscope. The subject matter of the invention provides a secondary electrons detector (1) constituted by a sensor (2) located in a detector chamber (3), to which a vacuum air pump (10) is connected to produce vacuum inside the detector chamber (3), the detector chamber (3) being in its wall near to the active surface of the sensor (2) enclosed with a diaphragm featuring high resistance to the transmission of gas and low resistance to the transmission of the electrons. The electrically conductive grid (11) is produced either in the form of a copper screen or as a kapton membrane (12) with orifices (13) and it is equipped on both sides with conductive coating (14, 15). Outside the detector chamber (3), the electrically conductive grid (11) is covered with an input screen (18), which is usually of hemispherical shape and is connected to the low voltage source (19) of 80 to 150 V.