Sheath capacitance observed by impedance probes onboard sounding rockets: Its application to ionospheric plasma diagnostics

Tomonori Suzuki, Takayuki Ono, Jyunpei Uemoto, Makoto Wakabayashi, Takumi Abe, Atsushi Kumamoto, Masahide Iizima

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Ion sheath which is formed around an electrode significantly affects the impedance of the probe immersed in a plasma. The sheath capacitances obtained from impedance probe measurements were examined for application to plasma diagnoses. We compared analytical calculations of the sheath capacitance with measurements from impedance probes onboard ionospheric sounding rockets. The S-520-23 sounding rocket experiment, which was carried out in mid-latitude, demonstrated that the observed sheath capacitances agreed well with those of the calculations. We concluded that the sheath capacitance measurements allow for estimation of the electron temperature and the electron density of a Maxwellian plasma. On the other hand, the sheath capacitances obtained from the S-310-35 rocket experiment in the auroral ionosphere showed lower values than expected. Auroral particles precipitations should modify the probe potential.

Original languageEnglish
Pages (from-to)579-587
Number of pages9
Journalearth, planets and space
Volume62
Issue number7
DOIs
Publication statusPublished - 2010

Keywords

  • Impedance probe
  • Ionosphere
  • Plasma diagnostics
  • Sheath capacitance

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

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