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 Title: Frequency band performance comparisons for room-temperature chirped pulse millimeter wave spectroscopy Author(s): Neill, Justin L. Contributor(s): Pate, Brooks; Muckle, Matt; Pulliam, Robin; Harris, Brent Subject(s): Chirped pulse Abstract: We present a performance comparison between chirped pulse millimeter wave spectrometers operating over 75-110, 260-290, and 520-580 GHz. For molecules at room temperature, the line strength has an approximately $\nu^3$ dependence until the peak of the Boltzmann distribution (typically in the submillimeter) is reached. However, we find competitive performance for 75-110 GHz spectrometers--with an average sensitivity drop of approximately 3-5 in equal measurement time, compared to a 260-290 GHz instrument with the same excitation power and measurement cell length. The narrower linewidth and lower line density at lower frequency, moreover, increase the usable dynamic range at 75-110 GHz by a factor of approximately 3-10 before reaching the confusion limit, giving better performance for extracting weak lines in a strong forest. This talk will discuss the reasons for and implications of these differences in performance for applications of chirped pulse millimeter wave spectroscopy. Issue Date: 2016-06-24 Publisher: International Symposium on Molecular Spectroscopy Genre: Conference Paper/Presentation Type: Text Language: En URI: http://hdl.handle.net/2142/91353 Rights Information: Copyright 2016 by the authors Date Available in IDEALS: 2017-01-26
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