Gaseous Electron Multiplier

A Gaseous Electron Multiplier (GEM) is a device used to amplify tiny electronic signals in particle detection. It consists of a thin sheet of insulating material coated with a fine pattern of metal electrodes. When a charged particle passes through the gas inside the device, it ionizes the gas molecules, releasing electrons. Applying a voltage causes these electrons to accelerate and multiply rapidly as they pass through tiny holes in the GEM, creating a larger, more easily detectable electrical signal. This process allows scientists to precisely measure and analyze particles or radiation in scientific and medical applications.