Accession Number : AD1025348

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

Descriptive Note : Technical Report,15 Jul 2011,14 Jan 2017

Corporate Author : University of Southern California Los Angeles United States

Personal Author(s) : Jiang,Chunqi

Full Text :

Report Date : 23 Jan 2017

Pagination or Media Count : 8

Abstract : 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 1)temporally 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.

Descriptors :   plasma jets , two photon absorption , laser induced fluorescence , high voltage , electrodes , emission spectroscopy , ground state

Subject Categories : Plasma Physics and Magnetohydrodynamics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE