Recombination of N+4 ions with electrons

Cao, Yang; Johnsen, Rainer

doi:10.1063/1.461361

Cited by 49 publications

(15 citation statements)

References 15 publications

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“…It is well established that formation of

N_{4}^{+}

occurs in nitrogen discharges at atmospheric‐pressure conditions. We calculate the rate constants and reaction rates for

N_{4}^{+}

production (Equation ) and

N_{4}^{+}

recombination (Equation ) for the same fixed set of parameters and establish that these rates are several orders of magnitude larger than both,

N_{2}^{+}

and

O_{2}^{+}

recombination rates:

\begin{matrix} true \\ O_{2}^{+} + normale \vec{true} products τ^{- 1} = n_{e} \cdot 1.95 \times 10^{- 7} {true(\frac{300}{T_{normalg}} true)}^{0.7} s^{- 1^{false[38 false]}} \\ = 7.97 \times 10^{4} s^{- 1}, \end{matrix}

\begin{matrix} trueleft \\ N_{2}^{+} + normale \vec{true} products τ^{- 1} = n_{e} \cdot 6.41 \times 10^{- 9} s^{- 1} \\ = 3.2 \times 10^{3} s^{- 1}, \end{matrix}

\begin{matrix} true \\ N_{2}^{+} 2 N_{2} \vec{true} \end{matrix}

…”

Section: Discussionmentioning

confidence: 99%

“…It is well established that formation of N 4 + occurs in nitrogen discharges at atmospheric-pressure conditions. We calculate the rate constants and reaction rates for N 4 + production (Equation (18)) [39] and N 4 + recombination (Equation (19) [40] for the same fixed set of parameters and establish that these rates are several orders of magnitude larger than both,…”

Section: Conditions Of the Dbdsmentioning

confidence: 99%

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Characterisation of volume and surface dielectric barrier discharges in N₂–O₂ mixtures using optical emission spectroscopy

Kogelheide

Offerhaus

Bibinov

et al. 2019

Plasma Processes & Polymers

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A volume and a twin surface dielectric barrier discharge (VDBD and SDBD) are generated in different nitrogen-oxygen mixtures at atmospheric pressure by applying damped sinusoidal voltage waveforms with oscillation periods in the microsecond time scale. Both electrode configurations are located inside vacuum vessels and operated in a controlled atmosphere to exclude the influence of surrounding air. The discharges are characterised with different spatial and temporal resolution by applying absolutely calibrated optical emission spectroscopy in conjunction with numerical simulations and current-voltage measurements. Plasma parameters, namely the electron density and the reduced electric field, and the dissipated power are found to depend strongly on the oxygen content in the working gas mixture. Different spatial and temporal distributions of plasma parameters and dissipated power are explained by surface and residual volume charges for different O 2 admixtures due to their effects on the electron recombination rate. Thus, the oxygen admixture is found to strongly influence the breakdown process and plasma conditions of a VDBD and a SDBD. K E Y W O R D S collisional-radiative model, controlled atmosphere, dielectric barrier discharge, optical emission spectroscopy, plasma parameters ---

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“…It is well established that formation of

N_{4}^{+}

occurs in nitrogen discharges at atmospheric‐pressure conditions. We calculate the rate constants and reaction rates for

N_{4}^{+}

production (Equation ) and

N_{4}^{+}

recombination (Equation ) for the same fixed set of parameters and establish that these rates are several orders of magnitude larger than both,

N_{2}^{+}

and

O_{2}^{+}

recombination rates:

\begin{matrix} true \\ O_{2}^{+} + normale \vec{true} products τ^{- 1} = n_{e} \cdot 1.95 \times 10^{- 7} {true(\frac{300}{T_{normalg}} true)}^{0.7} s^{- 1^{false[38 false]}} \\ = 7.97 \times 10^{4} s^{- 1}, \end{matrix}

\begin{matrix} trueleft \\ N_{2}^{+} + normale \vec{true} products τ^{- 1} = n_{e} \cdot 6.41 \times 10^{- 9} s^{- 1} \\ = 3.2 \times 10^{3} s^{- 1}, \end{matrix}

\begin{matrix} true \\ N_{2}^{+} 2 N_{2} \vec{true} \end{matrix}

…”

Section: Discussionmentioning

confidence: 99%

Section: Conditions Of the Dbdsmentioning

confidence: 99%

Characterisation of volume and surface dielectric barrier discharges in N₂–O₂ mixtures using optical emission spectroscopy

Kogelheide

Offerhaus

Bibinov

et al. 2019

Plasma Processes & Polymers

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“…The reactions and rate constants used are given in [1,25,30]. To describe the gas heating in the discharge, the following processes responsible for temperature increase have been taken into account: It was assumed that the recombination of N + 4 ion leads to production of excited N 2 (C 3 Π u ) molecules [32], and the rest of energy goes to vibrational excitation of molecular nitrogen N 2 (X 1 Σ + g , v ):…”

Section: Numerical Modeling and Discussionmentioning

confidence: 99%

Fast gas heating in nitrogen–oxygen discharge plasma: II. Energy exchange in the afterglow of a volume nanosecond discharge at moderate pressures

Mintoussov¹,

Pendleton²,

Gerbault³

et al. 2011

J. Phys. D: Appl. Phys.

102

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The process of fast gas heating in air in the near afterglow of a pulsed nanosecond spatially uniform discharge has been investigated experimentally and numerically at moderate (3−9 mbar) pressures and high (200−400 Td) reduced electric fields. The temporal behavior of discharge current, deposited energy, electric field and temperature were measured. The role of processes with participation of excited and charged species was analyzed. It was shown that under the considered conditions the main energy release takes place in reactions of nitrogen and oxygen dissociation by electron impact and quenching of electronically excited nitrogen molecules, such as N 2 (A 3 Σ + u , B 3 Π g , C 3 Π u , a' 1 Σ − u) by oxygen and quenching of excited O(1 D) atoms by N 2. It was shown that about 24% of the discharge energy goes to fast gas heating during first tens of microseconds after the discharge.

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“…176 Here, k att is the attachment rate, k det is the detachment rate, and k rec is the recombination rate. [177][178][179][180][181] For pure He, the O 2 concentration is too low to contribute significantly to the seed electrons. In this case, the electron density decay kinetics can be calculated approximately by Eq.…”

Section: Minimum Seed Electron Density For Repeatable Mode At Different Gas Pressuresmentioning

confidence: 99%

Guided ionization waves: The physics of repeatability

Lü

Ostrikov

2018

Applied Physics Reviews

159

136

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Guided ionization waves, or plasma streamers, are increasingly important for many applications in spanning materials processing and biomedicine. The highly reproducible, repeatable behavior of the most puzzling kind of the streamers-plasma bullets is highly attractive as it promises a high degree of control in many applications. However, despite a dozen years since the discovery of this phenomenon, the exact reasons for such behavior still remain essentially unclear. To understand the dynamics of the guided ionization wave (plasma bullet), a large number of works have been carried out and many interesting results have been reported. Here, we critically examine the available results and generalize the physical mechanisms of the guided ionization waves, which are of particular interest to practical applications of atmospheric-pressure plasma discharges, in general. The critical examination of the fundamental principles will show that, in order to propagate in a repeatable-mode, the plasma bullet must propagate in a channel with a high seed electron density (HSED), which is on the order of 10 9 cm À3 . This review concludes that to distinguish guided ionization waves from traditional positive streamer discharges, it is most appropriate to describe an atmospheric-pressure discharge featuring a plasma bullet behavior as an HSED discharge. When the HSED condition is met, the dynamics of a plasma plume appears to be repeatable. On the contrary, it propagates in an unrepeatable mode and emerges more like a positive streamer discharge when the HSED condition is not satisfied. According to this theory, the transition of the propagation mode of the plasma bullet between the repeatable mode and the stochastic mode can be well explained. Besides by controlling the seed electron density around the transition region between the HSED discharge and the traditional positive streamer, this knowledge will help in better understanding of the positive streamer discharges in air, in cases relevant to practical applications of such plasma discharges in materials processing technologies, industrial chemistry, nanotechnology, and health care.

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Recombination of N+4 ions with electrons

Abstract: Measurement of N+ 4 recombination rate vs electron temperature in a proton beam created plasma J. Chem. Phys. 81, 1753 (1984); 10.1063/1.447846Effect of nbutane impurity on electron mobility and electron-ion recombination rate constant in solid neopentane

Cited by 49 publications

References 15 publications

Characterisation of volume and surface dielectric barrier discharges in N₂–O₂ mixtures using optical emission spectroscopy

Characterisation of volume and surface dielectric barrier discharges in N₂–O₂ mixtures using optical emission spectroscopy

Fast gas heating in nitrogen–oxygen discharge plasma: II. Energy exchange in the afterglow of a volume nanosecond discharge at moderate pressures

Guided ionization waves: The physics of repeatability

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Recombination of N+4 ions with electrons

Abstract: Measurement of N+ 4 recombination rate vs electron temperature in a proton beam created plasma J. Chem. Phys. 81, 1753 (1984); 10.1063/1.447846Effect of nbutane impurity on electron mobility and electron-ion recombination rate constant in solid neopentane

Cited by 49 publications

References 15 publications

Characterisation of volume and surface dielectric barrier discharges in N2–O2 mixtures using optical emission spectroscopy

Characterisation of volume and surface dielectric barrier discharges in N2–O2 mixtures using optical emission spectroscopy

Fast gas heating in nitrogen–oxygen discharge plasma: II. Energy exchange in the afterglow of a volume nanosecond discharge at moderate pressures

Guided ionization waves: The physics of repeatability

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Product

Resources

About

Characterisation of volume and surface dielectric barrier discharges in N₂–O₂ mixtures using optical emission spectroscopy

Characterisation of volume and surface dielectric barrier discharges in N₂–O₂ mixtures using optical emission spectroscopy