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Note: On the measurement of plasma potential fluctuations using emissive probes

2014/05/01 by G. Bousselin, N. Lemoine, J. Cavalier +2
Engineering · Physics and Astronomy · #Laser-induced spectroscopy and plasma #Magnetic confinement fusion research #Plasma Diagnostics and Applications

paper · doi:10.1063/1.4875585

openalex publication_date 2014/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22

Abstract

In this Note, it is pointed out that emissive probes cannot be used to directly and reliably measure plasma potential fluctuations. An experimentally validated model demonstrates indeed that the floating potential fluctuations of an emissive probe which floats at the mean plasma potential depend not only on the plasma potential fluctuations but also on electron density and temperature fluctuations.

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