A secondary-electron detector using amplification through collisions in the specimen-chamber gas. Its field drives signal electrons toward collection while positive ions can move toward a negatively charging specimen. Operating pressure and electrode geometry control amplification and background.

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  1. Environmental scanning electron microscope
  2. Scanning electron microscope
  3. Electron microscope
  4. Electron optics
  5. Optics
  6. Branches of physics
  7. Physics
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