In mass spectrometry electron multipliers are often used as a detector of ions that have been separated by a mass analyzer of some sort. They can be the continuous-dynode type and may have a curved horn-like funnel shape or can have discrete dynodes as in a photomultiplier. Continuous dynode electron multipliers are also used in NASA missions and are coupled to a gas chromatography mass spectrometer (GC-MS) which allows scientists to determine the amount and types of gasses present on Titan, Saturn's largest moon. Night-vision Microchannel plates are also used in night-vision goggles. As electrons hit the millions of channels, they release thousands of secondary electrons. These electrons then hit a phosphor screen where they are amplified and converted back into light. The resulting image patterns the original and allows for better vision in the dark, while only using a small battery pack to provide a voltage for the MCP. See also Faraday cup Daly detector Phototube Photo-multiplier tube Scintillation counter Lucas cell Zoltán Lajos Bay (developer) References External links Olympus Tutorial How Discrete Dynode Electron Multipliers work Measuring instruments Radio electronics Mass spectrometry Electron Analytical chemistry de:Sekundärelektronenvervielfacher