Diagnostics of plasmas in and in contact with liquids

No abstract. TL

Gas phase hydrogen peroxide production in atmospheric pressure glow discharges operating in He - H2O

The gas phase production of hydrogen peroxide (H2O2) in a RF atmospheric pressure glow discharge with helium and water vapour has been investigated as a function of the gas flow. It is shown that the production of H2O2 is through the recombination of two OH radicals in a three body collision and the main destruction is through radical reactions involving OH or surface losses at the electrodes. Balancing these production and losses of H2O2 allows estimating OH densities which correspond with reported densities in literature for this type of discharge. 1. Introductio

Investigation of a capacitively coupled atmospheric pressure RF excited glow discharge in He-water mixtures by molecular beam mass spectroscopy

Abstract only

Gas phase hydrogen peroxide production in atmospheric pressure glow discharges operating in He - H2O

The gas phase production of hydrogen peroxide (H2O2) in a RF atmospheric pressure glow discharge with helium and water vapour has been investigated as a function of the gas flow. It is shown that the production of H2O2 is through the recombination of two OH radicals in a three body collision and the main destruction is through radical reactions involving OH or surface losses at the electrodes. Balancing these production and losses of H2O2 allows estimating OH densities which correspond with reported densities in literature for this type of discharge. 1. Introductio

Nanosecond pulsed discharges in N2 and N2/H2O mixtures

Nanosecond pulsed discharges in N2 and N2/H2O at atmospheric pressure between two pin-shaped electrodes are studied. The evolution of the discharge is investigated with time-resolved imaging and optical emission spectroscopy. The discharge consists of three phases, the ignition (mainly molecular emission), spark (mainly atomic and ionic emission) and recombination phase (mainly atomic emission). The electron density is obtained by broadening of the N 746 nm and Ha line and reaches very high values up to 4 10^24 m^-3. The gas temperature is obtained by OES and Rayleigh scattering

Simultaneous Thomson and Raman scattering on an atmospheric-pressure plasma jet

In this paper, laser scattering is applied to a cold atmospheric-pressure microwave plasma argon jet in direct contact with air. Spatially resolved measurements clearly show the air entrainment in the plasma jet. Consequently, the contributions from Thomson scattering and Raman scattering (N2 and O2) overlap. With a specially designed fitting method, we are able to obtain ne and Te, in spite of the significant Raman contribution

Thomson, Raman and Rayleigh scattering on atmospheric plasma

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Temperature fitting of partially resolved rotational spectra

In this paper we present a method to automatically fit the temperature of a rotational spectrum. It is shown that this fitting method yields similar results as the traditional Boltzmann plot, but is applicable in situations where lines of the spectrum overlap. The method is demonstrated on rotational spectra of nitric oxide from an atmospheric pressure microwave plasma jet operated with a flow of helium and air, obtained with two different methods: laser induced fluorescence and optical emission spectroscopy. Axial profiles of the rotational temperatures are presented for the ground NO X state and the excited NO A state