abstract:Plasma oscillations, also known as "Langmuir waves" (after Irving Langmuir), are rapid oscillations of the electron density in conducting media such as plasmas or metals. The oscillations can be described as an instability in the dielectric function of a free electron gas.
Theplasmaoscillationspectrum of electrical dischargechannelis analyzed, and the eigenfrequencyofmetalcrystal latticevibration is discovered in thespectrum.