Abstract
High energy molecular beam source in the range of 1 to 5eV is one of the most important tools to explore gas-surface interaction involving chemical reaction. Although the seeded beam and the arc-heated beam have been employed for such purpose, they have the drawback of the low beam intensity and the generation of undesirable excited species. It is known that the shock-heated molecular beam is capable of overcoming these problems. The object of this study is development of an ultra small shock tube for a high energy molecular beam source. First we evaluated a current loop valve for non diaphragm shock tube. As a result, we achieved the sufficient performance. Then we manufactured shock tube using the current loop valve and evaluated it. The shock speed reached to mach number 5.1. From this mach number, we can estimate the translational energy becomes 1.1 eV. Finally, we evaluated the shock tube for molecular beam source by measuring flight time distribution of molecule. The translational energy of the shock-heated beam exceeded that of non heated molecular beam.
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