DC Langmuir probe for measurement of space plasma: A brief review

Koichiro Oyama

Research output: Contribution to journalReview articlepeer-review

11 Citations (Scopus)


Herein, we discuss the in situ measurement of the electron temperature in the ionosphere/plasmasphere by means of DC Langmuir probes. Major instruments which have been reported are a conventional DC Langmuir probe, whose probe voltage is swept; a pulsed probe, which uses pulsed bias voltage; a rectification probe, which uses sinusoidal signal; and a resonance cone probe, which uses radio wave propagation. The content reviews past observations made with the instruments above. We also discuss technical factors that should be taken into account for reliable measurement, such as problems related to the contamination of electrodes and the satellite surface. Finally, we discuss research topics to be studied in the near future.

Original languageEnglish
Pages (from-to)167-180
Number of pages14
JournalJournal of Astronomy and Space Sciences
Issue number3
Publication statusPublished - 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Earth and Planetary Sciences(all)


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