Influence of Ambient-Air Nitrogen on the Argon Plasma Generated by a TIAGO Torch Open to Atmosphere

Rincón, Rocío; Muñoz, J.; Calzada, M. D.

doi:10.1109/tps.2014.2313654

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…The TIA and TIAGO plasmas have been extensively investigated and then employed in numerous applications by Calzada's team (Córdoba, Spain) [111][112][113] and [114][115][116][117], respectively. The paper by Rincón et al [111], which is particularly well documented in terms of operating conditions and plasma behaviour, characterizes some properties of the plasma obtained with the TIAGO system.…”

Section: Sw Plasma Torchesmentioning

confidence: 99%

Contribution of surface-wave (SW) sustained plasma columns to the modeling of RF and microwave discharges with new insight into some of their features. A survey of other types of SW discharges

Moisan¹,

Nowakowska²

2018

Plasma Sources Sci. Technol.

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maintenance E-field sustaining the discharge comes out as an internal parameter, i.e. it is operator independent, in contrast to what is generally believed whatever the kind of E-field sustained discharges; (ii) the smaller the volume in which power is absorbed with respect to the volume in which it is spent, the higher the intensity of the maintenance E-field: this leads to higher atomic (molecular) excitation rates inside than outside the absorption region (such is the case in microdischarges); (iii) the value of θ L varies significantly with the SW field frequency, decreasing with increasing frequency from the RF domain to that of microwaves; (iv) the power lost θ L , which is the power cost to sustain an electron-ion pair in an SWD, can serve to evaluate the efficiency of the various discharge regimes (diffusion and volume recombination with either single or step-wise ionisation); (v) the EM E-field intensity under the electron cyclotron resonance (ECR) condition passes through a minimum, not a maximum, contrary to what is generally claimed; (vi) similarity laws, originally derived with DC discharges, are generalized to include RF and microwave discharges. For example, θ A /p as a function of pR (p is the gas pressure and R the discharge tube inner radius) replaces advantageously the widely used E/p versus pR similarity law since θ A is more easily measured than E 2 and further it prevents considering the latter as an external parameter, etc. The important EM power loss due to space-wave radiation in the immediate vicinity of the SW launching interstice has escaped the attention of those working with SWDs. This effect is documented experimentally, showing in addition that it can be significantly reduced by using a cylindrical conducting enclosure, coaxial with the discharge tube, having a small enough radius such that it acts as a circular waveguide at cut-off. A survey limited to underlining specific properties and innovative features of SWDs other than plasma columns is conducted, which include planar SWDs and microwave discharges of the torch type sustained at atmospheric pressure, for instance, with the TIA and TIAGO E-field applicators: it is shown that their flame actually results from an SWD.

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Section: Sw Plasma Torchesmentioning

confidence: 99%

Contribution of surface-wave (SW) sustained plasma columns to the modeling of RF and microwave discharges with new insight into some of their features. A survey of other types of SW discharges

Moisan¹,

Nowakowska²

2018

Plasma Sources Sci. Technol.

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“…Nitrogen at 8000 K has an enthalpy five times higher than argon [15], since the energy gained by the one-atom gases in the plasma column is given by the specific heat and ionization energy, while in two-atom gases, in addition, the great volume of energy is obtained from the dissociation of molecules into atoms.…”

Section: Electron Temperature (T E )mentioning

confidence: 99%

Electrical Characteristics of Nonthermal Gliding Arc Discharge Reactor in Argon and Nitrogen Gases

El-Zein

Talaat

El-Aragi

et al. 2016

IEEE Trans. Plasma Sci.

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Gliding arc discharge (GAD) has the properties of both thermal and nonthermal plasma conditions. GAD plasma in the atmospheric pressure with argon/nitrogen and its characteristics are described. Some experimental results about alternating current gliding arc plasma generator have been obtained. It seems that the current density strongly depends on the gas type, and increased with increasing discharge current and gas flow rate. In addition, the discharge current of GAD in nitrogen gas (N 2 ) is greater than one in argon gas (Ar) because of N 2 needs more breakdown voltage than Ar. The intensity of GAD increased with increasing the gas flow rate. The oscillograms of discharge current in each case of Ar and N 2 were obtained. The electron temperatures of Ar and N 2 plasma were calculated to be 22 800 and 8400 K, respectively. The characteristics of both Ar and N 2 gases in atmospheric pressure, such as current density, electron density with flow rates (5, 10, 20, and 40) standard cubic foot per hour, were investigated and all experimental results were classified. An experimental study was carried out through using of GAD device for medical treatment by exposing three human blood samples of leukemia to the nonthermal GAD plasma for different periods.Index Terms-AC gliding arc discharge (GAD) device, argon and nitrogen gases, diagnostic technique, discharge at the atmospheric pressure, gas flow rate, nonthermal plasma.

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“…Ao mesmo tempo, a relação entre o tempo de residência e o tempo característico de difusão deve aumentar, de modo que o arrasto das partículas por difusão será muito importante. Esses efeito foi observado e descrito recentemente por(Rincon, Munoz & Calzada 2014).…”

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Diagnóstico e modelagem de plasmas gerados por micro/ondas e aplicações

Ridenti¹

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Influence of Ambient-Air Nitrogen on the Argon Plasma Generated by a TIAGO Torch Open to Atmosphere

Cited by 3 publications

References 8 publications

Contribution of surface-wave (SW) sustained plasma columns to the modeling of RF and microwave discharges with new insight into some of their features. A survey of other types of SW discharges

Contribution of surface-wave (SW) sustained plasma columns to the modeling of RF and microwave discharges with new insight into some of their features. A survey of other types of SW discharges

Electrical Characteristics of Nonthermal Gliding Arc Discharge Reactor in Argon and Nitrogen Gases

Diagnóstico e modelagem de plasmas gerados por micro/ondas e aplicações

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