Advanced spectroscopic studies of nanosecond pulsed microplasmas
Abstract
The goal of this research is to advance the understanding of plasma physics and chemistry for highly non-equilibrium microplasmas, particularly in forms of transient streamers in microscopic scales, generated with mixed flow fields and nanosecond pulsed electric fields. The objectives are: 1) to conduct fundamental studies of the initiation process of non-equilibrium pulsed microplasma sources; 2) to investigate the impact of nanosecond pulsed power parameters and gas flow on plasma properties including electron density and energy distribution function; 3) to evaluate the electron impact process versus the reduced electric field and their impact on the production of reactive plasma species. The objectives will be realized by 1) conducting both analytical and numerical studies of the streamer initiation process with respect to time-dependent reduced electric fields, and comparing the theoretical findings with experimental results obtained with breakdown studies that use synchronized high-speed imaging; 2) investigating the plasma properties versus the pulsed power parameters and flow fields using laser-aided spectroscopic techniques including Thomson laser scattering; 3) conducting both numerical and experimental studies of the chemical kinetics related to electron impact and heavy particle collisions of the plasma using advancedspectroscopic techniques and 2D axial-symmetry fluid-particle hybrid modeling. Success of this research will result in fundamental and critical information about the lowtemperature microplasmas as well as establishment of advanced diagnostic capability for atmospheric pressure plasmas. Importantly, this fundamental research will discover new forms and new excitation schemes of transient atmospheric pressure plasmas and develop these plasmas for a variety of DoD applications including energy-efficient engine ignition and combustion, noise reduction, pollution control, and effective and efficient biomedical disinfection and decontamination.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 28, 2017
- Source ID
- FA95501710257
Entities
People
- Chunqi Jiang
Organizations
- Air Force Office of Scientific Research
- Old Dominion University
- United States Air Force