Nonresonant multiphoton ionization of H2, CO and CO2 by second harmonics of picosecond YAG laser

Shigeyuki Sekine, Kiyohide Kokubun, Shingo Ichimura, Hazime Shimizu

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


A nonresonant multiphoton ionization method has been applied for pressure measurement in ultrahigh vacuum. Second harmonics of a commercial picosecond YAG laser was used for ionization of gases in order to reduce noise caused by scattered laser light. Saturation of ionization was observed for H2, CO and CO2 gases at incident laser power density of about 1013 Wƃcm-2.

Original languageEnglish
Pages (from-to)L1284-L1285
JournalJapanese journal of applied physics
Issue number9
Publication statusPublished - 1993 Sep
Externally publishedYes

ASJC Scopus subject areas

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


Dive into the research topics of 'Nonresonant multiphoton ionization of H<sub>2</sub>, CO and CO<sub>2</sub> by second harmonics of picosecond YAG laser'. Together they form a unique fingerprint.

Cite this