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 Title: Chirped-pulse Fourier-transformation microwave/pulsed uniform flow spectrometer: the low-temperature, pulsed uniform supersonic flow system Author(s): Abeysekera, Chamara; Suits, Arthur; Sims, Ian; Field, Robert W.; Park, Barratt; Zack, Lindsay; Joalland, Baptiste; Oldham, James; Prozument, Kirill Subject(s): Mini-symposium: Spectroscopy in Kinetics and Dynamics Abstract: Traditional techniques (e.g. REMPI, imaging, etc.) that are used to study reaction dynamics are able to provide a great deal of fundamental information about systems containing atoms and smaller molecules. However, as larger molecules and more complex systems are targeted, it becomes more of a challenge to determine isomer- and vibrational level-specific information and accurate branching ratios. In order to complement existing methods and obtain information about larger systems, a Ka-band (26-40 GHz) chirped-pulse Fourier transform microwave (CP-FTMW) spectrometer has been has been constructed. The system integrates a pulsed uniform supersonic flow (PUSF) source to ensure that experimental conditions, such as temperature and density, are well-known and constant. This PUSF system is based around a high-throughput piezoelectric stack valve, a Laval nozzle, and simple pumping scheme. This system is able to produce cold, uniform flows with densities on the order of 10$^{16}$ cm$^{-3}$ that persist for up to 20 cm from the nozzle exit. A description of this system and its characterization will be presented. Issue Date: 2014-06-16 Publisher: International Symposium on Molecular Spectroscopy Citation Info: Abeysekera, C.; Suits, A.; Sims, I.; Field, R.W.; Park, B.; Zack, L.; Joalland, B.; Oldham, J.; Prozument, K. CHIRPED-PULSE FOURIER-TRANSFORM MICROWAVE/PULSED UNIFORM FLOW SPECTROMETER: THE LOW-TEMPERATURE, PULSED UNIFORM SUPERSONIC FLOW SYSTEM. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.MH02 Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/59159 DOI: https://doi.org/10.15278/isms.2014.MH02 Rights Information: Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Date Available in IDEALS: 2014-12-082015-04-14
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