University of Illinois Urbana-Champaign

Chirped-pulse Fourier-transformation microwave/pulsed uniform flow spectrometer: the low-temperature, pulsed uniform supersonic flow system

Abeysekera, Chamara; Suits, Arthur; Sims, Ian; Field, Robert W.; Park, Barratt; Zack, Lindsay; Joalland, Baptiste; Oldham, James; Prozument, Kirill

Permalink

https://hdl.handle.net/2142/59159

Description

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
Issue Date
2014-06-16
Keyword(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.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Language
en
Permalink
http://hdl.handle.net/2142/59159
DOI
https://doi.org/10.15278/isms.2014.MH02
Copyright and License Information
Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

Owning Collections

Abstracts & Presentations - 2014 International Symposium on Molecular Spectroscopy PRIMARY