Mass spectrometry in shock tunnels
A continuously sampling mass spectrometer was designed and constructed to detect the onset of driver gas contamination in a free piston shock tunnel. A skimmer, which formed a molecular beam that was ionised and analysed by a quadrupole mass spectrometer, sampled the flow. The design and construction of the vacuum system, the ion source, and the mass spectrometer are discussed. The response time of the apparatus was estimated to be 10 x 10⁻⁶ sec. It was established that a mass...[Show more]
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