University of Illinois Urbana-Champaign

NEAR-INFRARED SPECTROSCOPY OF DISSOCIATED NAPHTHALENE IN A RADIOFREQUENCY PLASMA

Lecomte, Julien

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6819.pdf
WL04_1.pptx

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https://hdl.handle.net/2142/122491

Description

Title
NEAR-INFRARED SPECTROSCOPY OF DISSOCIATED NAPHTHALENE IN A RADIOFREQUENCY PLASMA
Author(s)
Lecomte, Julien
Contributor(s)
  • Georges, Robert
  • Rutkowski, Lucile
  • Kassi, Samir
  • Dudás, Eszter
  • Boswell, Rod W
  • Charles, Christine
  • Suas-David, Nicolas
Issue Date
2023-06-21
Keyword(s)
Mini-symposium: Infrared Spectroscopy in the JWST Era
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are abundant organic molecules detected in several objects in the universe, such as molecular clouds in the interstellar medium (ISM)ᵃ. Their structure can be modified through plasma-driven processes occurring in the ISM. The present study focuses on the dissociation of naphthalene (C₁₀H₈) in a radiofrequency (RF) plasma, probed using cavity ringdown spectroscopy (CRDS) in the near-infrared. Namely, the low-power RF plasma source, called Platypus, is adapted from a small plasma thruster (“Pocket Rocket”) designed by the Space Plasma Power and Propulsion laboratory of the ANUᵇ. A stable supersonic jet plasma is generated by expanding a mixture of argon and dissociated C₁₀H₈ into a vacuum chamber through a 20 mm long, 4 mm wide slit nozzleᶜ. The jet-cooled fragmented C₁₀H₈ is finally probed with the ultra-sensitive CRDS technique. We recorded a spectrum from 5950 to 6120 cm⁻¹ composed of several hundred transitions originating from many different molecules, radicals, and probably ionsᵈ.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
Text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/122491
DOI
https://doi.org/10.15278/isms.2023.6819

Owning Collections

Abstracts & Presentations - 2023 International Symposium on Molecular Spectroscopy PRIMARY