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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1830

Title: A visible plasma
Authors: Alexeff, I
Dyer, F
Rader, M
Keywords: steady-state plasma
electron plasma oscillations
metallic cesium
plasma frequency
Issue Date: 1989
Citation: Plasma Science, IEEE Conference Record - Abstracts, IEEE International Conference on, 35 - 36p.
Abstract: Summary form only. The authors have obtained a steady-state plasma with the plasma frequency in the visible. Thus, in principle, phenomena such as the production of electron plasma oscillations can be observed visually. The authors have shown that metallic cesium has both a very low value of free electron density, n, due to its bloated atomic size, and a large number of bound electrons (54) that are polarizable and increase the value of permittivity, ε, to 1.4165 ε0, where ε0 is the permittivity of vacuum. The low value of electron density alone results in a plasma frequency corresponding to ultraviolet light at 3630 Å, but adding in the correction to ε0 results in a wavelength of 4320 Å, which is in the blue. The authors have succeeded in photographing the blue light penetrating above the cutoff at the plasma frequency
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1830
Appears in Collections:Physics

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