State-by-state spectra fitting tool for highly non-equilibrium plasmas:Analysis of the OH spectra of Barrier Discharge at Water Interface

HODER, Tomáš, Jan VORÁČ and Petr SYNEK. State-by-state spectra fitting tool for highly non-equilibrium plasmas:Analysis of the OH spectra of Barrier Discharge at Water Interface. In Gaseous Electronics Conference. 2017.

Basic information

• Original name: State-by-state spectra fitting tool for highly non-equilibrium plasmas:Analysis of the OH spectra of Barrier Discharge at Water Interface
• Authors: HODER, Tomáš (203 Czech Republic, guarantor, belonging to the institution), Jan VORÁČ (203 Czech Republic) and Petr SYNEK (203 Czech Republic).
• Edition: Gaseous Electronics Conference, 2017.

Other information

• Original language: English
• Type of outcome: Conference abstract
• Field of Study: 10305 Fluids and plasma physics
• Country of publisher: United States of America
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• RIV identification code: RIV/00216224:14310/17:00095602
• Organization unit: Faculty of Science
• Keywords (in Czech): fitovani spekter; nerovnovazne plazma; voda
• Keywords in English: spectra fitting; non-equilibrium plasma; water
• Tags: International impact, Reviewed

Abstract

Recently, the interest in discharges in contact with water increased enormously. Often, the discharges are ignited in a noble gas and the atoms and water fragments are the only available spectral signature. In such cases, the spectrum of hydroxyl radical may seem attractive for neutral gas thermometry. This contribution brings an extensive analysis of OH(A-X) spectrum obtained on special case of kHz driven surface DBD in contact with water. We have observed a spectrum that can be interpreted as a superposition of emission from several groups of OH. We have distinguished three groups - cold group, best observable for low N’ quantum numbers, hot group, best observable for higher N’ quantum numbers and the third group influenced by iso-energetic vibrational energetic transfer OH(A,v’=1 -> v’=0), best observable for 8 < N’< 14. The data was processed by the novel method of state-by-state fitting. This approach combines spectral simulation and traditional Boltzmann plot construction procedure. A synthetic spectrum is simulated for each rovibronic upper state, including the instrumental broadening and matched with the measurement. This functionality was incorporated to the massiveOES software.

Links

• GJ16-09721Y, research and development project: Name: Pokročilé experimentální studium přechodných povrchových výbojů

Investor: Czech Science Foundation