Langmuir probe

A Langmuir probe is a scientific instrument used to measure properties of ionized gases, or plasmas, such as those found in space or in fusion reactors. It consists of a small electrode inserted into the plasma, which collects charged particles. By varying the voltage on the probe and measuring the resulting electric current, researchers can determine key characteristics of the plasma, like its density, temperature, and electron properties. This information is crucial for understanding various physical processes in astrophysics, fusion energy, and other fields involving ionized gases.