Gaseous Electron Multipliers

A Gaseous Electron Multiplier (GEM) is a device used to detect and amplify tiny electrical signals, typically from ionizing particles like radiation. It works by creating a special gas-filled environment where incoming particles interact with gas molecules, freeing electrons. These electrons are then accelerated through electric fields, causing further ionization and generating more electrons. This process multiplies the initial signal, allowing for sensitive measurement of low levels of radiation. GEMs are valuable in scientific research, medical imaging, and safety monitoring, helping us understand and measure phenomena that would otherwise go undetected.