University of Illinois Urbana-Champaign

THE DEVELOPMENT OF A NEW L-SHAPED FTMW SPECTROMETER WITH CAVITY AND CHIRPED PULSE SETUPS FOR SPECTROSCOPIC AND REACTION DYNAMICS/KINETICS INVESTIGATIONS

Rajapaksha, Rusiru PH

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6859.pdf
FD06_1.pptx

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https://hdl.handle.net/2142/122324

Description

Title
THE DEVELOPMENT OF A NEW L-SHAPED FTMW SPECTROMETER WITH CAVITY AND CHIRPED PULSE SETUPS FOR SPECTROSCOPIC AND REACTION DYNAMICS/KINETICS INVESTIGATIONS
Author(s)
Rajapaksha, Rusiru PH
Contributor(s)
  • Gurusinghe, Ranil
  • Swann, Mitchell W
  • Starnes, Jared Michael
  • Zhukova, Vas
Issue Date
2023-06-23
Keyword(s)
Instrument/Technique Demonstration
Abstract
We are reporting the progress in developing a new molecular beam Fourier transform microwave (FTMW) spectrometer at Tennessee Tech University. The spectrometer uses an L-shaped vacuum chamber to house Cavity and Chirped pulse FTMW setups. This configuration allows faster switching between narrowband and broadband modes without interference from one to the other. The Fabry-Perot cavity is established using two 7.5 in. diameter and 30 cm radius of curvature Aluminum mirrors. The chamber for the chirped pulse setup is built using a polycarbonate tube, following the design of the CPUF Spectrometer from the Suits Group. This microwave transparent polycarbonate chamber enables mounting the horn antennas outside of the vacuum chamber for easier adjustment of their positions with respect to the supersonic expansion, which is a particularly useful feature for using FTMW spectroscopic detection with uniform supersonic flows. The initial setup will be used for recording high-resolution and broadband rotational spectra of supersonically cooled molecular systems in the 8 - 18 GHz frequency range.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
Text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/122324
DOI
https://doi.org/10.15278/isms.2023.6859

Owning Collections

Abstracts & Presentations - 2023 International Symposium on Molecular Spectroscopy PRIMARY