Emission spectroscopy of atmospheric pressure plasmas for bio-medical and environmental applications

Machala, Zdenko; Janda, M.; Hensel, Karol; Jedlovský, I.; Leštinská, L.; Foltin, V.; Martišovitš, V.; Morvová, Marcela

doi:10.1016/j.jms.2007.03.001

Cited by 303 publications

(230 citation statements)

References 20 publications

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“…The UV light emission confirmed active species such as OH radicals measured at 306.4 nm, 307.8 nm and 308.9 nm [45,51]. UV light emissions from 316 nm and higher wavelengths were also observed, which affect the sterilization process of bacteria [52,53].…”

Section: Emission Spectrum Observation Of Microplasmamentioning

confidence: 89%

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Study of Sterilization and Disinfection in Room Air by Using Atmospheric Microplasma

Shimizu¹,

Komuro²,

Tatematsu³

et al. 2011

Pharm Anal Acta

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Section: Emission Spectrum Observation Of Microplasmamentioning

confidence: 89%

“…Higher peaks indicate the N 2 second positive band system (N 2 SPS) and smaller peaks indicate the N 2 first negative band system (N 2 + FNS). The spectrum indicates the generation of active molecular nitrogen species in the microplasma discharge [45].…”

Section: Emission Spectrum Observation Of Microplasmamentioning

confidence: 99%

Study of Sterilization and Disinfection in Room Air by Using Atmospheric Microplasma

Shimizu¹,

Komuro²,

Tatematsu³

et al. 2011

Pharm Anal Acta

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“…Highly soluble salts causing elevated conductivity and greater risk of flashover include: NaCl, NaNC>3, MgSO4, etc. [69]. It is possible to obtain the rotational temperature of OH, in fact the gas temperature, using different salts as the pollution layer.…”

Section: Recommendations For Future Workmentioning

confidence: 99%

Spectroscopic investigation of arc over an ice surface /

Nekahi¹

2011

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Ice accumulation on insulators of overhead transmission lines and substations has been recognized as a major problem which may cause insulator flashover and power outages. This phenomenon starts with corona discharge activity and continues with the formation of partial arcs which may result in flashover. Due to the complexity of the process, resulting from surface interaction of discharge with the water film on the ice surface, is not yet fully understood. As for any other type of discharge, the knowledge of some parameters such as temperature and concentration of different species is necessary in order to describe the mechanisms involved. Moreover, to develop mathematical models for discharge propagation, an estimation of discharge channel conductivity is necessary. The current flows through this conductive channel and supplies the energy needed to sustain the ionization activity inside the channel. The conductivity of discharge channel is directly related to its temperature, which illustrates the need for discharge temperature measurements. Up to now, for an arc over an ice surface the temperature has been assumed to have a constant value of 5,000 K, but without any experimental support.The existence of Local Thermodynamic Equilibrium (LTE) is another important aspect for proposing theories and models, but this has not yet been verified for flashover on icecovered insulators. The verification of LTE condition requires information about temperature and concentration of different species, electron density and ionization level.The objective of this research is to augment our knowledge of flashover on icecovered insulators by measuring and calculating several important discharge column parameters. Measurement of rotational and excitation temperatures, and electron density during arc propagation are the first steps. The effect of discharge current, voltage type and polarity on the variation of the mentioned arc parameters should be also studied.Based on these data, the LTE condition could be examined.Spectroscopic plasma diagnostic is a non-destructive test method used to achieve the stated objectives. The emitted light from an arc over an ice surface was transmitted to a spectrometer. The time-resolved recorded spectra of arc were used to study the nature and concentration of ionized species. The gas and electron temperatures and electron densities were also measured using Boltzmann and Stark broadening methods.Measured rotational temperatures were found to vary from 4,000 K to 6,500 K, while the current increased from 200 mA to 700 mA during the discharge propagation. It was observed that under similar experimental conditions, the arc current intensity of DC+ arcs were hotter than that of DC-. Moreover, arc temperatures under AC voltage were lower than those of DC+, and close to that of DC-. The excitation temperature was measured at about 9,000 K and does not vary significantly with discharge current. As current increases, electron densities increased as well. For currents ranging from 200 mA to 700 mA, ...

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“…It has not been sufficiently reduced to enable possible computational simulation in two and three dimensions, Computer simulation of the discharge of surface plasma to interact with the flow of sound above pressure of compression is a severe problem on a large scale [4] The atmospheric pressure of plasma in Ar resulting from electrostatic discharge has attracted considerable attention to a wide range of application such as environmental and biomedical and industrial applications such as air pollution control, sewage cleaning, sterilization, bioremediation, surface treatment, materials analysis, electromagnetic wave modulation, carbon enrichment, nanotube growth [5][6][7][8] The integration of all aspects of plasma into one single model thus leads to an irreducible model. Particle simulation, which is limited to single-dimensional models, is performed mainly on a parallel panel and has been made an important contribution to the understanding of the non-local effect in the double discharge for capacity [9 -10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Secondary Electron Emission Product Factor on Electron and Ion Densities and Electron Kinetic Energy for Ar Gas Discharge Plasma by using OOPIC PRO Simulation Code

2017

IJSR

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In this research, Ar gas discharge plasma was simulated by using OOPIC Pro simulation code. The conditions of the simulation were adopted at simulation time 10 -6 s, initial electron and ion densities 10 16 m -3 , Ar gas pressure 0.5mbar. Electron and ion densities and electrons kinetic energy were investigated by varying secondary electron emission product factor (γ) and fixing other simulation factors.For γ=0.1,0.2 and 0.3 it has been found that kinetic energy of electron and electron and ion densities will be affected, the results have been analyzed and discussed.

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Emission spectroscopy of atmospheric pressure plasmas for bio-medical and environmental applications

Cited by 303 publications

References 20 publications

Study of Sterilization and Disinfection in Room Air by Using Atmospheric Microplasma

Study of Sterilization and Disinfection in Room Air by Using Atmospheric Microplasma

Spectroscopic investigation of arc over an ice surface /

Effect of Secondary Electron Emission Product Factor on Electron and Ion Densities and Electron Kinetic Energy for Ar Gas Discharge Plasma by using OOPIC PRO Simulation Code

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