Characteristics of the Contaminated Langmuir Probe

Details Characteristics of the Contaminated Langmuir Probe Characteristics of the Contaminated Langmuir Probe

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jass...12..234p&link_type=abstract

Journal of Astronomy and Space Sciences, vol.12, no 2, p.234-243.

Astronomy and Astrophysics

Astronomy

Scientific paper

Korea's third rocket, which is currently under development for launch on 1997, is expected to reach as high as 160km and thus, it will provide a good opportunity for the direct measurement of the plasmas in the E-region ionosphere of the Korean peninsula. Langmuir probe techniques, which are the basic tools of the plasma experiment, may yield inaccurate results if they are applied in the conventional form as they are used in the laboratory experiments because of the contamination. In the present paper we study the contamination problem by performing the ground experiments in the vacuum chamber using the contaminated probe. The result shows that the contamination effect is reduced when the plasma density is low or when the frequency of the sweep voltage is fast. We propose a modified Langmuir probe based upon our experiments which is suitable for the rocket experiments.

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