Time-resolved measurements of electric field, electron temperature, and electron density in a nanosecond-pulsed dielectric barrier discharge

Timothy Y. Chen, Benjamin M. Goldberg, Aric C. Rousso, Yiguang Ju, Egemen Kolemen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Non-equilibrium low temperature plasmas are characterized by low neutral gas temperatures and highly energetic electrons that excite, ionize, and dissociate the neutral species. To understand the electron dynamics, the source of the electron energy, the electric field, and the electron properties, their temperature and density, must be measured in the same plasma. With these three parameters, a complete picture of the electron dynamics can be obtained. The electric field was measured using electric field induced second harmonic generation (E-FISH), while the electron temperature and density was measured through incoherent Thomson scattering. It was found that shortly after breakdown, a secondary discharge may have occurred to bring the electron density to measurable levels. Furthermore, the electrons did not decay below 0.5 eV even though the electric field was nearly zero, indicating superelastic collisions with Ar metastables could be important for heating the electrons.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105951
DOIs
StatePublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: Jan 6 2020Jan 10 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF

Conference

ConferenceAIAA Scitech Forum, 2020
CountryUnited States
CityOrlando
Period1/6/201/10/20

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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