Plasma diagnosis (DLP)

DLP

Double Langmuir probe(DLP) is a device that can measure ion density, electron temperature and ion saturation current. It consists of two metal probes, a variable power source that can apply voltage to the probe, and a device that can measure the current flowing through the probe. As in the single Langmuir probe, the double Langmuir probe shows an I-V characteristic curve that represents the current characteristics of the voltage change. The ion density, the electron temperature, and the ion saturation current can be obtained by analyzing the curves. The characteristic curve of the double Langmuir probe shows the origin symmetric shape.