Electron plasma waves and plasma resonances

Franklin, R. N. and Braithwaite, N. St. J. (2009). Electron plasma waves and plasma resonances. Plasma Sources Science and Technology, 18(1) pp. 1–4.

DOI: https://doi.org/10.1088/0963-0252/18/1/014019


In 1929 Tonks and Langmuir predicted of the existence of electron plasma waves in an infinite, uniform plasma. The more realistic laboratory environment of non-uniform and bounded plasmas frustrated early experiments. Meanwhile Landau predicted that electron plasma waves in a uniform collisionless plasma would appear to be damped. Subsequent experimental work verified this and revealed the curious phenomenon of plasma wave echoes. Electron plasma wave theory, extended to finite plasmas, has been confirmed by various experiments. Nonlinear phenomena, such as particle trapping, emerge at large amplitude. The use of electron plasma waves to determine electron density and electron temperature has not proved as convenient as other methods.

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