Abstract
We describe a 10 Hz repetition rate, 100 μsec duration, reliable pulsed supersonic molecular beam source. Mechanical and electrical design of the pulsed valve are given in detail. Characteristics of the supersonic expansion obtained using coherent anti-Stokes Raman spectroscopy (CARS) in acetylene are presented. They include pulse shape, gas rotational and translational cooling as a function of distance from the nozzle, clustering effects, and shock heating at the leading edge of the pulse.
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