Production of O2(Δ1) in flowing plasmas using spiker-sustainer excitation

Babaeva, Natalia Yu; Arakoni, R.A.; Kushner, Mark J.

doi:10.1063/1.2199387

Cited by 19 publications

(24 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where V is the gas velocity vector. In [121,122], 2D simulation of RF N-APPJs with the parallel-plate electrodes is performed using nonPDPSIM fluid dynamics code [123]. The densities of the plasma components both in the discharge core between the electrodes and in the effluent are calculated.…”

Section: Brief Historical Perspectivementioning

confidence: 99%

Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

et al. 2016

View full text Add to dashboard Cite

Non-equilibrium atmospheric-pressure plasmas have recently become a topical area of research owing to their diverse applications in health care and medicine, environmental remediation and pollution control, materials processing, electrochemistry, nanotechnology and other fields. This review focuses on the reactive electrons and ionic, atomic, molecular, and radical species that are produced in these plasmas and then transported from the point of generation to the point of interaction with the material, medium, living cells or tissues being processed. The most important mechanisms of generation and transport of the key species in the plasmas of atmospheric-pressure plasma jets and other non-equilibrium atmosphericpressure plasmas are introduced and examined from the viewpoint of their applications in plasma hygiene and medicine and other relevant fields. Sophisticated high-precision, timeresolved plasma diagnostics approaches and techniques are presented and their applications to monitor the reactive species and plasma dynamics in the plasma jets and other discharges, both in the gas phase and during the plasma interaction with liquid media, are critically reviewed. The large amount of experimental data is supported by the theoretical models of reactive species generation and transport in the plasmas, surrounding gaseous environments, and plasma interaction with liquid media. These models are presented and their limitations are discussed. Special attention is paid to biological effects of the plasma-generated reactive oxygen and nitrogen (and some other) species in basic biological processes such as cell metabolism, proliferation, survival, etc. as well as plasma applications in bacterial inactivation, wound healing, cancer treatment and some others. Challenges and opportunities for theoretical and experimental research are discussed and the authors' vision for the emerging convergence trends across several disciplines and application domains are presented to stimulate critical discussions and collaborations in the future. 4 3.5 Optical absorption spectroscopy 3.5.1 Ozone 3.5.2 UV broadband absorption of OH density 3.5.3 Cavity ring-down spectroscopy 3.5 Selected non-optical techniques 3.5.1 Mass spectrometry 3.5.2 Flow visualization 3.5.3 Electron paramagnetic resonance spectroscopy 4. Temporal and spatial behaviour of key reactive species 4.1 Electron density (n e) 4.2 O atoms 4.2.1 Effect of admixture of O 2 /air on O concentration 4.2.2 Diffusion effect of shielding gas on O production 4.3 OH radical 4.3.1 Effect of H 2 O admixture on OH concentration 4.3.2 Effect of gas flow on OH concentration 4.3.3 Effect of O 2 on OH production 4.3.4 Effect of the treated samples on OH concentration 4.3.4.1 Effect of humidity of treatment sample on OH distribution 4.3.4.2 Effect of sample conductivity on OH distribution 4.3.4.3. Effect of the amplitude of the applied voltage on OH distribution 4.3.4.4. The effect of gas flow on OH distribution 4.3.4.5. The effect of the surface characteristics on OH distribution 4.3.5 Effe...

show abstract

Section: Brief Historical Perspectivementioning

confidence: 99%

Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Atomic oxygen depletes the upper laser level, , I*, and must be controlled. , This was accomplished by the use of NO 2 titration made downstream from the discharge or by adding NO to the discharge flow or downstream of the discharge; all of these approaches resulted in the oxygen atoms being depleted to a level such that there were still enough oxygen atoms to dominate the I 2 dissociation process but low enough such that the power loss through the I* + O quenching channel is not seriously detrimental. Subsequent efforts have demonstrated gain − and lasing 17,18 in other ElectricOIL configurations since the first demonstrations. , ElectricOIL discharge models ,− have been developed, and post-dishcarge kinetics-gain-laser modeling 4,15 has been performed. For an excellent topical review of discharge production of O 2 (a) and ElectricOIL studies, see Ionin et al…”

Section: Introductionmentioning

confidence: 99%

Oxygen Discharge and Post-Discharge Kinetics Experiments and Modeling for the Electric Oxygen−Iodine Laser System

et al. 2007

View full text Add to dashboard Cite

Laser oscillation at 1315 nm on the I(2P1/2)-->I(2P3/2) transition of atomic iodine has been obtained by a near resonant energy transfer from O2(a1Delta) produced using a low-pressure oxygen/helium/nitric oxide discharge. In the electric discharge oxygen-iodine laser (ElectricOIL) the discharge production of atomic oxygen, ozone, and other excited species adds levels of complexity to the singlet oxygen generator (SOG) kinetics which are not encountered in a classic purely chemical O2(a1Delta) generation system. The advanced model BLAZE-IV has been introduced to study the energy-transfer laser system dynamics and kinetics. Levels of singlet oxygen, oxygen atoms, and ozone are measured experimentally and compared with calculations. The new BLAZE-IV model is in reasonable agreement with O3, O atom, and gas temperature measurements but is under-predicting the increase in O2(a1Delta) concentration resulting from the presence of NO in the discharge and under-predicting the O2(b1Sigma) concentrations. A key conclusion is that the removal of oxygen atoms by NOX species leads to a significant increase in O2(a1Delta) concentrations downstream of the discharge in part via a recycling process; however, there are still some important processes related to the NOX discharge kinetics that are missing from the present modeling. Further, the removal of oxygen atoms dramatically inhibits the production of ozone in the downstream kinetics.

show abstract

“…The model and prior applications have been previously discussed in detail [48,49]. nonPDPSIM has been successfully applied to the study of micro atmospheric pressure plasma jets [21,39,[43][44][45][46][47]. Here, only a brief description of nonPDPSIM is provided.…”

Section: Description Of the Simulation Modelmentioning

confidence: 99%

Electron heating mode transitions in radio-frequency driven micro atmospheric pressure plasma jets in He/O$_{2}$: A fluid dynamics approach

Liu,

Korolov,

Hemke

et al. 2021

Preprint

View full text Add to dashboard Cite

A two-dimensional fluid model is used to investigate the electron heating dynamics and the production of neutral species in a capacitively coupled radiofrequency micro atmospheric pressure helium plasma jet -specifically the COST jet -with a small oxygen admixture. Electron heating mode transitions are found to be induced by varying the driving voltage amplitude and the O 2 concentration numerically and experimentally. The helium metastable density, and the charged species densities are highly relevant to the electron heating dynamics. By analyzing the creation and destruction mechanisms of the negative ions, we find that the generation of negative ions strongly depends on the O 2 concentration. The increase of the electronegativity with the increasing O 2 concentration leads to an enhancement of the bulk drift electric field. The distributions of the different neutral species densities along the direction of the gas flow inside the jet, as well as in the effluent differ a lot due to the relevant chemical reaction rates and the effect of the gas flow. The simulated results show that a fluid model can be an effective tool for qualitative investigations of micro atmospheric pressure plasma jets.

show abstract

Production of O2(Δ1) in flowing plasmas using spiker-sustainer excitation

Cited by 19 publications

References 28 publications

Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

Reactive species in non-equilibrium atmospheric-pressure plasmas: Generation, transport, and biological effects

Oxygen Discharge and Post-Discharge Kinetics Experiments and Modeling for the Electric Oxygen−Iodine Laser System

Electron heating mode transitions in radio-frequency driven micro atmospheric pressure plasma jets in He/O$_{2}$: A fluid dynamics approach

Contact Info

Product

Resources

About