Measurements of Time-of-Flight Distributions of Shock-Heated Molecular Beams

摘要

Molecular beam source employing a shock tube is an attractive choice for the translational energy of around 1 eV, which corresponds to the typical activation energy of surface reactions. We developed a non-diaphragm type small shock tube as the molecular beam source generating high energy and dissociated molecular beams. The drastic reduction of the tube volume enables the repetitive operation of the shock tube at the frequency of 0.5 Hz. Installing the shock tube into the molecular beam setup, we measured the time-of-flight distributions of nitrogen and oxygen beams, and demonstrated the performance on controllability of the beam energy and the dissociation rate of molecules.