Effective ionization coefficients and limiting field strength of fluoronitriles-CO2 mixtures

2017 ◽  
Vol 24 (2) ◽  
pp. 886-892 ◽  
Author(s):  
H.E. Nechmi ◽  
A. Beroual ◽  
A. Girodet ◽  
P. Vinson
Keyword(s):  
Field Strength ◽  
Ionization Coefficients ◽  
Effective Ionization

Electron transport and effective ionization coefficients in C2F6, C2F6–Ar and C2F6–N2mixtures

2004 ◽  
Vol 37 (13) ◽  
pp. 1774-1779 ◽  
Author(s):  
J de Urquijo ◽  
A A Castrejón-Pita ◽  
J L Hernández-Ávila ◽  
E Basurto
Keyword(s):  
Electron Transport ◽  
Ionization Coefficients ◽  
Effective Ionization

scholarly journals Effective ionization coefficients for low current dc discharges in alcohol vapours at low pressure

2021 ◽  
Vol 75 (6) ◽  
Author(s):  
Jelena Marjanović ◽  
Dragana Marić ◽  
Gordana Malović ◽  
Zoran Lj. Petrović
Keyword(s):  
Electric Field ◽  
Low Pressure ◽  
Operating Conditions ◽  
Gas Density ◽  
Emission Profile ◽  
Standard Operating ◽  
Ionization Coefficients ◽  
Townsend Discharge ◽  
Good Agreement ◽  
Effective Ionization

Abstract This paper presents results for effective ionisation coefficients ($$\alpha _{\mathrm {eff}}/N$$ α eff / N , N—gas density) obtained from the breakdown voltage and emission profile measurements in low-pressure dc discharges in vapours of alcohols: methanol, ethanol, isopropanol, and n-butanol. Our results for $$\alpha _{\mathrm {eff}}/N$$ α eff / N are determined from the axial emission profiles in low-current Townsend discharge and lay in the interval of reduced electric field E/N (E—electric field, N—gas density), from 1 kTd to 8.8 kTd. We also give a comparison of our experimental results with those from the available literature. Our data cover the high E/N range of the standard operating conditions and in the region where other data are available we have a good agreement. Graphic abstract

scholarly journals Ionization and Attachment Coefficients in C4F7N Gas Measured by the Steady-State Townsend Method

2019 ◽  
Vol 9 (18) ◽  
pp. 3686 ◽  
Author(s):  
Zhaoyu Qin ◽  
Yunxiang Long ◽  
Zhenyu Shen ◽  
Cheng Chen ◽  
Liping Guo ◽  
...  
Keyword(s):  
Steady State ◽  
Electric Field ◽  
Electric Fields ◽  
Room Temperature ◽  
Ionization Coefficient ◽  
Ionization Coefficients ◽  
Insulation Performance ◽  
Attachment Coefficient ◽  
Good Agreement ◽  
Effective Ionization

The normalized Townsend first ionization coefficient α/N and normalized attachment coefficient η/N in pure C4F7N were measured by using the steady-state Townsend (SST) method for a range of reduced electric fields E/N from 750 to 1150 Td at room temperature (20 °C). Meanwhile, the effective ionization coefficients are obtained. All SST experimental results show good agreement with pulsed Townsend (PT) experiment results. Comparisons of the critical electric fields of C4F7N with SF6 and other alternative gases such as c-C4F8 and CF3I indicate that C4F7N has a better insulation performance with a much higher normalized critical electric field at 959.19 Td.

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