A method for measuring fast time evolutions of the plasma potential by means of a simple emissive probe

S. Iizuka, P. Michelsen, J. Juul Rasmussen, R. Schrittwieser, R. Hatakeyama, K. Saeki, N. Sato

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

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
Article number017
Pages (from-to)1291-1295
Number of pages5
JournalJournal of Physics E: Scientific Instruments
Volume14
Issue number11
DOIs
Publication statusPublished - 1981 Dec 1

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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