Dielectric strength of breakdown voltage of Nitrogen and Carbon-dioxide

Singhasathein, Arnon; Pruksanubal, A.; Tanthanuch, Nutthaphong; Rungseevijitprapa, Wandee

doi:10.1109/ecticon.2013.6559491

Cited by 4 publications

(2 citation statements)

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“…The maximum He fractions (v/v), avoiding electrical breakdown, were 63 and 43%, respectively. These limits are slightly under those for He/N 2 mixtures, , as the breakdown threshold (for dc or rf voltages over a broad range of gap widths) is lower in CO 2 than in N 2 , typically by ∼10%. − At DV = 5.0 kV, a lower He fraction than that used in the MCA analyses (using DV = 4.0 kV) resulted in higher, more stable ion signals and thus more precise E C shifts. The usual E C scan rate was s = 0.09 V/(cm·s).…”

Section: Project Definition and Experimental Methodsmentioning

confidence: 95%

Identification of Isomers by Multidimensional Isotopic Shifts in High-Field Ion Mobility Spectra

2018

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Nearly all molecules incorporate elements with stable isotopes. The resulting isotopologue envelopes in mass spectra tell the exact stoichiometry but nothing about the geometry. Chromatography and electrophoresis at high resolution also can distinguish isotopologues, again without revealing structural information. In high-definition differential ion mobility (FAIMS) spectra, these envelopes universally split in a structure-specific manner, providing a new general approach to isomer delineation. Here, we show that the peak shifts from instances of the same isotope are equal and can be averaged into characteristic elemental shifts, namely C andCl for dichloroanilines (DCA). Matrices of these shifts, including the gas composition dimension, are unique to the structure. Hence, all six DCA isomers (with four making two unresolved pairs) are readily delineated in the C/Cl maps with He/CO buffer gases. Mixtures of coeluting isomers are also distinguished from pure components.

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Section: Project Definition and Experimental Methodsmentioning

confidence: 95%

Identification of Isomers by Multidimensional Isotopic Shifts in High-Field Ion Mobility Spectra

2018

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“…The search for an alternative gas has revealed that CO 2 is a suitable replacement for SF 6 [14,[16][17][18][19][20][21][22]. ABB has introduced the first high voltage circuit breaker using CO 2 to the market [23].…”

Section: Positive Streamers In Co 2 With or Without Admixturesmentioning

confidence: 99%

Simulation of positive streamers in CO₂ and in air: the role of photoionization or other electron sources

Bagheri

Teunissen

Ebert

2020

Plasma Sources Sci. Technol.

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Positive streamer discharges have been studied and modelled extensively in air. Here we study positive streamers in CO 2 with and without oxygen admixtures; they are relevant for current high voltage technology as well as for discharges in the atmosphere of Venus. We discuss that no ef cient photoionization mechanism is known for gases with a large CO 2 fraction, as photons in the relevant energy range are rapidly absorbed. Hence positive streamers can propagate only due to some other source of free electrons ahead of the ionization front. Therefore we study positive streamer propagation in CO 2 with different levels of background ionization to provide these free electrons. The effect of replacing photoionization by background ionization is studied with simulations in air. Simulating streamers in background elds of 16 to 20 kV cm −1 at standard temperature and pressure within a gap of 6.4 cm, we nd that streamer propagation is rather insensitive to the level of photoionization or background ionization. We also discuss that the results depend not only on the value of breakdown eld and applied electric eld, and on preionization or photoionization, but also on the electron mobility µ(E) and the effective ionization coef cient α eff (E), that are gas-dependent functions of the electron energy or the electric eld.

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A review of microwave–metal discharge interaction: Mechanism, regulation, and application for synthesis of nanomaterials

Xie,

Shi,

et al. 2024

Nano Res.

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Dielectric strength of breakdown voltage of Nitrogen and Carbon-dioxide

Cited by 4 publications

References 1 publication

Identification of Isomers by Multidimensional Isotopic Shifts in High-Field Ion Mobility Spectra

Identification of Isomers by Multidimensional Isotopic Shifts in High-Field Ion Mobility Spectra

Simulation of positive streamers in CO₂ and in air: the role of photoionization or other electron sources

A review of microwave–metal discharge interaction: Mechanism, regulation, and application for synthesis of nanomaterials

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Dielectric strength of breakdown voltage of Nitrogen and Carbon-dioxide

Cited by 4 publications

References 1 publication

Identification of Isomers by Multidimensional Isotopic Shifts in High-Field Ion Mobility Spectra

Identification of Isomers by Multidimensional Isotopic Shifts in High-Field Ion Mobility Spectra

Simulation of positive streamers in CO2 and in air: the role of photoionization or other electron sources

A review of microwave–metal discharge interaction: Mechanism, regulation, and application for synthesis of nanomaterials

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Simulation of positive streamers in CO₂ and in air: the role of photoionization or other electron sources