Evaluation of Mach probe characteristics and measurement of high-Mach-number plasma flow

Akira Ando, Toshiaki Watanabe, Takashi Watanabe, Ryuichi Sato, Kenji Harata, Hiroyuki Tobari, Kunihiko Hattori, Masaaki Inutake

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Mach probe characteristics are evaluated by using a directional Langmuir probe (DLP) in a fast flowing plasma produced by a magneto-plasma-dynamic arcjet (MPDA). The obtained data are compared with Hutchinson's simulation results which are calculated using a particle-in-cell (PIC) code in an unmagnetized plasma [I.H. Hutchinson, Plasma Phys. Control. Fusion, 44 (2002) 1953]. The experimentally obtained data are in good agreement with the simulation results in the wide range of Mi (0.4 < Mi < 1.7). Two types of the Mach probe, where the probe tips are facing to up-down directions and para-perp ones, are compared with model formulas and the simulation results. Good agreements are obtained among these data and calibration factors to determine the Mach number are evaluated.

Original languageEnglish
Pages (from-to)692-696
Number of pages5
JournalThin Solid Films
Publication statusPublished - 2006 May 26


  • Directional Langmuir probe
  • Mach probe
  • Supersonic plasma flow
  • Unmagnetized plasma

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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