Mass spectrometer

Mass spectrometer

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Credit: TEK IMAGE/SCIENCE PHOTO LIBRARY

Caption: Mass spectrometer. Laboratory equipment called a time of flight secondary ion mass spectrometer (TOF SIMS). The TOF SIMS is used to analyse the surface of a sample. The sensor array can be seen through the round window (lower left). A pulsed ion beam is used to remove molecules from the subject's surface. The molecules are ionised and accelerated towards a detector. The time it takes them to reach the detector depends on their mass. The advantage of this system is that macromolecules (such as polymers or proteins) are not disintegrated by the beam. TOF SIMS is used in coatings research, microelectronics and surface contamination studies.

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Keywords: analysing, analysis, apparatus, chemical, chemistry, equipment, industry, mass spectrometer, porthole, secondary ion, sensor array, still life, still-life, surface, technology, time of flight, tof sims, window

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