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Author(s):
K. Sato and F. Miyawaki
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Title:
Heat Flow of a Two-Electron-Temperature Plasma through the Sheath in the Presence of Electron Emission
Date of publication:
Mar. 1992
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Key words:
secondary electron emission, plasma sheath, heat flow, two-electron-temperature plasma, space-charge limitation
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Abstract:
The electrostatic sheath and the heat flow of a two-electron-temperature plasma in the presence of electron emission is investigated analytically. It is shown that the energy flux is remarkably enhanced up to a value near the electron free-flow energy flux as a result of considerable reduction of the sheath potential due to electron emission if the fraction of hot electrons at the sheath edge is much smaller than one. If the hot- to cold-electron temperature is of the order of ten and the hot electron density is comparable with the cold electron density, the action of the sheath as a thermal insulator is improved as a result of suppression of electron emission due to the space-charge effect of hot electrons.
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