Time-of-Flight Mass Spectrometry Using a Mid-Infrared Free-Electron Laser

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  • NAITO Yasuhide
    Institute of Free Electron Laser, Graduate School of Engineering,Osaka University
  • SASAKI Rie
    Institute of Free Electron Laser, Graduate School of Engineering,Osaka University
  • HEYA Manabu
    Institute of Free Electron Laser, Graduate School of Engineering,Osaka University
  • AWAZU Kunio
    Institute of Free Electron Laser, Graduate School of Engineering,Osaka University

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A time-of-flight mass spectrometric apparatus was built for infrared matrix-assisted laser desorption/ionization (IR-MALDI) experiments using a free-electron laser (FEL). Preliminary experiments were carried out with a CO2 laser at 9.5 μm and a FEL at 10.6 μm. These mid-IR wavelengths were shown to produce light atomic ions from solid samples. The detected ion peaks were broadened by the FEL macropulse with 15 μs width. Applying a delayed extraction pulse to FEL-generated ions brought about a small improvement on the mass resolution. By chopping a flux of ions at exit of the ion source region, the ion peak width became narrower by a factor of more than 10.

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  • 質量分析

    質量分析 51 (4), 458-465, 2003

    一般社団法人 日本質量分析学会

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