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Measurement of ion-rich sheath thickness by ion acoustic wave

Published online by Cambridge University Press:  13 March 2009

S. Watanabe ,
O. Ishihara  and
H. Tanaca
S. Watanabe
Affiliation:
Institute of Materials Science and Engineering, Yokohama National University, Yokohama, Japan
O. Ishihara
Affiliation:
Institute of Materials Science and Engineering, Yokohama National University, Yokohama, Japan
H. Tanaca
Affiliation:
Institute of Materials Science and Engineering, Yokohama National University, Yokohama, Japan
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Abstract

Measurements of sheath thickness in a low-pressure plasma are reported. The sheath is ion-rich and contains both ions and electrons; the sheath edge is taken as a boundary for ion acoustic waves. The thickness of the sheath is estimated from a frequency shift of the wave. Despite the actually continuous transition from plasma to sheath, a clear-cut sheath edge is observed. It should be emphasized that even a very small increase in thickness, such as 0·1mm, can be measured by this frequency-analysis method. The experimentally obtained sheath boundary is in agreement with the Tonks–Langmuir value as modified by Self.

Type
Research Article
Information
Journal of Plasma Physics , Volume 8 , Issue 3 , December 1972 , pp. 321 - 330
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Alexeff, I. & Jones, W. D. 1969 Phys. Fluids, 12, 345.CrossRefGoogle Scholar
Allis, W. P. & Buchsbaum, S. J. 1959 Plasma dynamics notes A-1-E-40. Electrons, Ions and Waves. M.I.T. Press.Google Scholar
Andrews, J. G. & Varey, R. H. 1971 Phys. Fluids, 14, 339.CrossRefGoogle Scholar
Caruso, A. & Cavaliere, A. 1962 Nuovo Cimento, 26, 1389.CrossRefGoogle Scholar
Child, C. D. 1911 Phys. Rev. 32, 492.Google Scholar
Dote, T. 1968 J. Phys. Soc. Japan, 24, 224.CrossRefGoogle Scholar
Dote, T. 1969 J. Phys. Soc. Japan, 27, 1640.CrossRefGoogle Scholar
Goldan, P. D. 1970 Phys. Fluids, 13, 1055.CrossRefGoogle Scholar
Harrison, E. R. & Thompson, W. B. 1959 Proc. Phys. Soc. 74, 145.CrossRefGoogle Scholar
Langmuir, I. 1913 Phys. Rev. 2, 450.CrossRefGoogle Scholar
Langmuir, I. 1929 Phys. Rev. 33, 954.CrossRefGoogle Scholar
Self, S. A. 1963 Phys. Fluids, 6, 1762.CrossRefGoogle Scholar
Tanaca, H., Hirose, A. & Koganei, M. 1966 a Phys. Rev. Lett. 16, 1079.CrossRefGoogle Scholar
Tanaca, H., Hirose, A. & Koganei, M. 1966 b Phys. Lett. 23, 679.CrossRefGoogle Scholar
Tanaca, H., Hirose, A. & Koganei, M. 1967 Phys. Rev. 161, 94.CrossRefGoogle Scholar
Tonks, L. & Langmuir, I. 1929 Phys. Rev. 34, 876.CrossRefGoogle Scholar
Varey, R. H. & Sander, K. F. 1969 J. Phys. D 2, 541.Google Scholar
Watanabe, S. & Tanaca, H. 1973 Plasma Phys. 15. (To be published.)CrossRefGoogle Scholar