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Jpn. J. Appl. Phys. 3 (1964) pp. 789-796  |Next Article|  |Table of Contents|
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Effect of a Magnetic Field upon the Saturation Electron Current of an Electrostatic Probe

Toshihiko Dote, Hiroshi Amemiya and Torao Ichimiya

Institute of Physical and Chemical Research

(Received August 1, 1964)

Some experiments are performed in several kinds of discharged plasma to investigate the influence of a magnetic field upon the saturation electron current of an electrostatic probe. The apparent electron density N_e' and the positive ion density N₊ are calculated from the saturation electron current and the positive ion saturation current respectively and the ratio N_e'/N₊ is plotted against ωτ (ω: the angular cyclotron frequency of electrons, τ: the mean collision time between electrons and molecules). The curve is found to show a clear dependence on the gas pressure, and when the ratio is log -log plotted against the magnetic field, it gives a nearly straight line, showing N_e'/N₊ to be 0.1 at about 1,000 gauss. Since the positive ion saturation current is hardly influenced by the magnetic field of the order of several kilogauss, it is apparent that these properties are based upon the behavior of the electrons around the probe. A theory developed by Bohm and others is applied here to explain the experimental results.

URL: http://jjap.jsap.jp/link?JJAP/3/789/
DOI: 10.1143/JJAP.3.789

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See Also:

• Japanese Journal of Applied Physics 4 (1965) pp. 319A-319A :

  Erratum : Effect of a Magnetic Field upon the Saturation Electron Current of an Electrostatic Probe

  Toshihiko Dote, Hiroshi Amemiya and Torao Ichimiya

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References | Citing Articles (22)

1. R. J. Bickerton and V. von Engel: Proc. Phys. Soc. London B 69 (1956) 468.
2. B. Bohm, E. H. S. Burhop and H. S. W. Massay: The Characteristics of Electrical Discharges in Magnetic Fields, edited by A. Guthrie and R. K. Wakering. McGraw-Hill Book Company, Inc., 1949 CHAP 2.
3. T. Dote and H. Amemiya: J. Phys. Soc. Jpn. 19 (1964) 1915.
4. T. Dote: Internal Report of Electrical Communication Lab. No. 1351 (1960).
5. S. C. Brown: Basic Data of Plasma Physics 1959.
6. P. Moon and D. E. Spencer: Field Theory for Engineers, D. Van Nostrand Co. Inc., 1961 CHAP 10.
7. P. Moon and D. E. Spencer: Field Theory Handbook, Springer Verlag, 1961 p. 40.
8. I. Langmuir and K. B. Blodget: Phys. Rev. 22 (1923) 347[APS].
9. Y. Watanabe and H. Kobayashi: J. Elec. Eng. Japan 74 (1954) 388.

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