Effect of a virtual cathode on the I-V trace of a planar Langmuir probe

Experimental and modelling studies were performed to investigate how the presence of a virtual cathode (Forest and Herschkowitz 1986 J. Appl. Phys. 60 1295) near a planar Langmuir probe affects its accuracy in electron temperature measurements. It is found that the effect of the virtual cathodes cau...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2015-10, Vol.48 (39), p.395201-395206
Main Authors: Yip, Chi-Shung, Hershkowitz, Noah
Format: Article
Language:English
Subjects:
Accuracy
Cathodes
Electron temperature measurement
Flattening
Forests
Langmuir probes
Modelling
plasma diagnostics
plasma physics
sheath
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Summary:Experimental and modelling studies were performed to investigate how the presence of a virtual cathode (Forest and Herschkowitz 1986 J. Appl. Phys. 60 1295) near a planar Langmuir probe affects its accuracy in electron temperature measurements. It is found that the effect of the virtual cathodes causes the I-V trace to flatten and falsely create higher electron temperature measurements.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/48/39/395201