Multi-antennae detection in a CP-FTMW spectrometer

Marshall, Frank E.

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https://hdl.handle.net/2142/104473 Copy

Description

Title

Multi-antennae detection in a CP-FTMW spectrometer

Author(s)

Marshall, Frank E.

Contributor(s)

• Grubbs, G.S., II
• Donnell, Kristen
• Moon, Nicole
• Duerden, Amanda Jo

Issue Date

2019-06-19

Keyword(s)

Instrument/technique demonstration

Abstract

Recent experiments in the Grubbs research group at the Missouri University of Science and Technology have shown that it is possible to detect rotational spectra of molecules in a CP-FTMW using multiple horn antennae. This allows for increased sensitivity by sampling a free induction decay twice, each at a separate point. Utilizing the traditional CP-FTMW design of two horns – one for transmitting and one for receiving – it was shown that it is possible to use the transmitting horn to also receive spectra. This is achieved by adding a circulator, switch, and low noise amplifier in the circuit between the transmitting horn and power amplifier. This has been demonstrated on OCS, 1,3-Difluorobenzene, and Chloroacetone in the 6-18 GHz region of the electromagnetic spectrum utilizing a variety of experimental setups. Results of these experiments as well as issues with implementing this setup, such as FID phasing issues and data analysis, will be discussed. \begin{wrapfigure}{R} {0pt} \hspace{1.5in} \includegraphics[scale=0.6] {circulatordiagram.eps} \end{wrapfigure}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/104473

DOI

https://doi.org/10.15278/isms.2019.WC05

Copyright and License Information

Copyright 2019 Frank E. Marshall

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