A Method for Measuring Fast Time Evolutions of the Plasma Potential by Means of a Simple Emissive Probe

Research output: Contribution to journalJournal article – Annual report year: 1981Researchpeer-review

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A method is presented for obtaining the temporal evolution of the plasma potential, which is assumed to be given by the floating potential of a simple emissive probe. The construction of the probe is also described. The method avoids the slow time response of the usual technique where the floating potential is measured across a high resistance. During each sweep of the probe voltage, the changing of the sign of the probe current, which is sampled at a specific time, gives rise to a negative pulse, driving the pen-lift of an X-Y recorder. Since the real floating potential is measured where the probe current is zero, the disturbance of the plasma is kept as low as possible.
Original languageEnglish
JournalJournal of Physics E: Scientific Instruments
Issue number11
Pages (from-to)1291-1295
Publication statusPublished - 1981
CitationsWeb of Science® Times Cited: No match on DOI

ID: 5720706