Recombination effects with high-pressure Langmuir probes

Recombination effects with high-pressure Langmuir probes

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

With increasing ion density, the ion current collected by a negatively biased electric probe is eventually dominated by ions produced by reactive processes in the vicinity of the probe. Here, we derive an expression for the probe current to a cylindrical probe when all the ions collected to the probe are assumed to be generated within the sheath which surrounds the probe. Measurements of probe current in a seeded atmospheric-pressure flame are in good agreement with the theory. The significance of reaction processes is reinforced by the fact that the maximum probe current is found to be approximately three times the total current that the flame would produce with frozen chemistry, i.e. the saturation current.


    1. 1)
      • J.D. Swift , M.J.R. Schwar . (1969) , Electrical probes for plasma diagnostics.
    2. 2)
      • C.H. Su , S.H. Lam . Continuum theory of spherical electrostatic probes. Phys. Fluids , 1479 - 1491
    3. 3)
      • I.M. Cohen . Asymptotic theory of spherical electrostatic probes in a slightly ionized collision-dominated gas. Phys. Fluids , 1492 - 1499
    4. 4)
      • P.M. Chung , L. Talbot , K.J. Touryan . Electric probes in stationary and flowing plasmas: part 2. Continuum probes. AIAA J. , 144 - 154
    5. 5)
      • 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
    6. 6)
      • G.F. Carrier , F.E. Fendell . Electrostatic probe in a reacting gas. Phys. Fluids , 2966 - 2982
    7. 7)
      • A.F. Ashton , A.N. Hayhurst . Kinetics of collisional ionization of alkali metal atoms and recombination of electrons with alkali metal ions in flames. Combust. Flame , 69 - 75

Related content

This is a required field
Please enter a valid email address