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

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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

Language

eng

Handle URL

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

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