Pressure Measurement with Laser 1. Laser-ionization Characteristics of Various Kinds of Gases

Kiyohide Kokubun, Shingo Ichimura, Hazime Shimizu

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2 Citations (Scopus)


For the purpose of applying the laser-ionization method to measuring gas pressure, particularly in the range of UHV and XHV, the laser-ionization characteristics for various kinds of gases have been studied using XeCl, KrF and ArF ex-cimer lasers. The proportional relation between the ionization signal and the gas pressure was experimentally verified to 1 × 10-8 Torr (1.3 × 10-6 Pa). In the case of rare gases and O2 gas, the dependence of the ionization signal on the laser intensity was in agreement with the theory of nonresonant multiphoton ionization. Saturation of ionization was observed in the case of Xe.

Original languageEnglish
Pages (from-to)7-14
Number of pages8
Issue number1
Publication statusPublished - 1990 Jan 1
Externally publishedYes


ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

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