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Yurun Xie, Heyang Liu, Yue Xiao, Jie Han, Zhichao Li, Yuzhao Wang, Tao Wang, Xueming Yang, Tiangang Yang. Development and Characterization of a Narrow-Pulsed Molecular Beam System[J]. Chinese Journal of Chemical Physics .
Citation: Yurun Xie, Heyang Liu, Yue Xiao, Jie Han, Zhichao Li, Yuzhao Wang, Tao Wang, Xueming Yang, Tiangang Yang. Development and Characterization of a Narrow-Pulsed Molecular Beam System[J]. Chinese Journal of Chemical Physics .

Development and Characterization of a Narrow-Pulsed Molecular Beam System

  • Received Date: 2023-03-26
  • Accepted Date: 2023-04-14
  • Rev Recd Date: 2023-04-13
  • Available Online: 2023-04-18
  • A narrow-pulsed and velocity-controlled molecular beam system is constructed by using a high-speed chopper and a temperature adjustable pulsed valve. The duration of the hydrogen molecular beam pulse is reduced to approximately 6.3 μs and characterized using resonance-enhanced multiphoton ionization (REMPI) at a distance of ~193 mm downstream from the nozzle. To precisely determine the velocity of the hydrogen molecules, a pump-probe technique combining stimulated Raman pumping (SRP) and REMPI is employed at a fixed distance (193 mm) with nanosecond lasers. By adjusting the temperature of the pulsed valve, the velocity of the hydrogen beam is continuously varied from 1290 m/s to 3550 m/s. The system exhibits potential for multiple applications in the field of chemical reaction dynamics, including its potential to integrate with ion traps and surface scattering experiments.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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