Preliminary measurement of h2 pressure through detection of photoelectrons in vacuum range from 10–3 to 10–6 pa

Shigeyuki Sekine, Kiyohide Kokubun, Shingo Ichimura

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1 Citation (Scopus)


H2 molecules in a vacuum chamber were nonresonantly ionized by an intense visible laser pulse, and the number of photoelectrons produced was measured as a function of H2 pressure. The signal intensity was proportional to H2 pressure in the range from 1 × 10–3 to 1 × 10–6 Pa. The present result showed experimentally that the detection of laser-induced photoelectrons can be applied for the measurement of pressure in the ultrahigh-vacuum range.

Original languageEnglish
Pages (from-to)L1274-L1276
JournalJapanese journal of applied physics
Issue number9
Publication statusPublished - 1994 Sep
Externally publishedYes


  • H
  • Ionization
  • Laser
  • Photoelectron
  • Pressure
  • Ultrahigh vacuum

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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