English: A diagram showing how a scanning helium microscope works. A beam is formed by a gas expansion and collimation through a skimmer and pinhole. The beam is then incident on the sample, where the gas is scattered and collected through a detector aperture. The scattered gas is then detected using a mass spectrometer. By then rastering the sample, an image of the sample can be formed.
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Captions
Schematic diagram of how a scanning helium microscope works