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Day 2, June 11（Tue.） Room P1 (Multipurpose Hall)・Room P2 (Conference Room 101+102)
- 2P-07
Mass Spectrometer Combined with Femtosecond Laser to Observe Non-equilibrium Desorption Process
(1Osaka Univ., 2Atelier monotreme, 3Kyoto Univ.)
oJianzhong Wang1, Yasuo Kanematsu1, Atsushi Muratsugu2, Fuyuki Matsuda3, Wakana Matsuda1, Yosuke Kawai1, Michisato Toyoda1
Femtosecond laser desorption/ionization has gained attention in the last decade as a relatively new ionization technique in mass spectrometry imaging. For femtosecond lasers to achieve sample material transformation, the power density is typically between 1010 and 1016 W/cm2. Most femtosecond laser applications in mass spectrometry are used as ionization methods by multiphoton absorption in a high electric field, and the pulse energy exceeds the sample ablation threshold with a power density of 1013~1014 W/cm2. To minimize damage to the samples and explore the low-intensity femtosecond laser ionization process, we have developed a time-of-flight (TOF) mass spectrometer using the ultrashort laser pulse as the ionization source. We have added a waveplate to control the laser polarization state. By changing the directions of laser field propagation, we expect to prevent laser field-driven electrons from returning to the ion and being neutralized, which may lead to an efficient ion yield in mass spectrometry.