超音速ノズルビーム装置の試作とその特性

抄録

A pulsed supersonic molecular beam apparatus has been constructed using an automobile fuel injector as the nozzle beam source and a “flow-through” detector. The apparatus is separated into three parts and is differentially evacuated by five turbo-molecular pumps with moderate pumping speeds. The flow-through detector, which has a high senistivity and a sufficient time resolution, was used in time-of-flight (TOF) measurements of molecular velocities. For the TOF measurements of the pulsed beams we developed a data acquisition system using two personal computers. The maximum speed ratios and absolute beam intensities of the pulsed beams of He, Ne, Ar, D₂, N₂, CO₂ and C₂H₂ prepared in the present apparatus are satisfactorily high compared with the values so far published.