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Fundamental Studies of Transient, Atmospheric-Pressure, Small-Scale Plasmas

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Technical Report,15 Jul 2011,14 Jan 2017

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University of Southern California Los Angeles United States

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Fundamental studies of nanosecond pulsed atmospheric pressure plasmas including a millimeter He-O2 plasma jet, generated with a concentric tubular electrode configuration, and micrometer He plasma jet, generated with a single electrode, were conducted. These studies include 1temporally and spatially resolved measurements of atomic oxygen ground state O3P in the 2-cm long, 1-mm He-O2 plasma jets using Two-Photon Absorption Laser Induced Fluorescence TALIF 2 plasma dynamics and emission spectroscopic comparisons of single-electrode helium microplasma jets that was excited with 5 ns or 164 ns, 8 kV pulses at 500 Hz. Applications of the atmospheric pressure plasma jets and jet arrays e.g. plasma brush were explored for surface decontamination against pathogenic bacteria and biofilms, as well as for treatment of cervical cancer, in vitro. Other studies involving portable nanosecond pulsed power generation based gas switches or photoconductive solid state switches, non-equilibrium surface plasma chemistry and applications were also conducted.

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics
  • Atomic and Molecular Physics and Spectroscopy

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