Ion current to a plane probe in a flowing plasma

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Ion current to a plane probe in a flowing plasma

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© The Institution of Electrical Engineers
Published

An expression is developed for the ion current to a plane probe in a flowing plasma, for the probe surface parallel to the ion flow, and neglecting ion thermal motion. The application of the result to the measurement of plasma density of a plasma torch is considered.

Inspec keywords: plasma devices; electric variables measurement; electric current measurement; probes

Subjects: Other electric variables measurement; Other instrumentation and measurement systems; Current measurement; Bench and portable instruments; Other electric variables control; Plasma temperature and density; Plasma diagnostic techniques and instrumentation

References

    1. 1)
      • R.M. Clements , P.R. Smy . Ion current to a spherical probe in a flowing high-pressure plasma under thin-sheath conditions. Proc. IEE , 1721 - 1724
    2. 2)
      • R.M. Clements , P.R. Smy . Ion current from a collision-dominated flowing plasma to a cylindrical electrode surrounded by a thin sheath. J. Appl. Phys. , 3745 - 3749
    3. 3)
      • Freeston, I. L, and Kelk, J.E.: ‘Measurement of ion density in a plasma torch using a plane probe’ (see p. 811).
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