Electron swarm parameters of the hydrofluoroolefine HFO1234ze

Chachereau, Alise; Rabie, Mohamed; Franck, Christian M.

doi:10.1088/0963-0252/25/4/045005

Cited by 62 publications

(136 citation statements)

References 16 publications

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“…This model explains the strong pressure dependence of the effective ionization rate observed in the swarm study. Similar dependencies of the effective ionization rate on the gas pressure or temperature were observed in numerous other gases [34,40,41] and were attributed to the occurrence of three-body electron attachment. Thus the occurrence of three-body attachment to c-C 4 F 8 O is quite plausible.…”

Section: Discussionsupporting

confidence: 74%

“…The initial distribution of the electrons released by the laser is assumed to be a Dirac delta. The analytical model (6) is fitted to the measured current as described in detail in [34] to obtain the electron swarm parameters…”

Section: Experimental Setup and Methodsmentioning

confidence: 99%

“…Through the processes (8)(9)(10), the density of electrons is coupled with that of (C 4 F 8 O − ) * S . After a few τ , the growth of the electron number is exponential, with the rate [34,40] …”

mentioning

confidence: 99%

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Electron attachment properties of c-C₄F₈O in different environments

Chachereau¹,

Fedor²,

Janečková³

et al. 2016

J. Phys. D: Appl. Phys.

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Abstract. The electron attachment properties of octafluorotetrahydrofuran (c-C 4 F 8 O) are investigated using two complementary experimental setups. The attachment and ionization cross sections of c-C 4 F 8 O are measured using an electron beam experiment. The effective ionization rate coefficient, electron drift velocity and electron diffusion coefficient in c-C 4 F 8 O diluted to concentrations lower than 0.6% in the buffer gases N 2 , CO 2 and Ar, are measured using a pulsed Townsend experiment. A kinetic model is proposed, which combines the results of the two experiments.

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Section: Discussionsupporting

confidence: 74%

Section: Experimental Setup and Methodsmentioning

confidence: 99%

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Electron attachment properties of c-C₄F₈O in different environments

Chachereau¹,

Fedor²,

Janečková³

et al. 2016

J. Phys. D: Appl. Phys.

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“…With the addition of relatively low proportions (5%-20% here) of the electronegative HFO-1234ze, however, the breakdown voltage can be significantly increased, for both polarities. The effective ionisation coefficient of HFO-1234ze decreases with increasing pressure [31]. The decreasing effective ionisation coefficient reduces the probability of a free electron becoming available to initiate breakdown [29].…”

Section: Discussionmentioning

confidence: 99%

Characterization and Statistical Analysis of Breakdown Data for a Corona-Stabilized Switch in Environmentally Friendly Gas Mixtures

Macpherson

Wilson

MacGregor

et al. 2018

IEEE Trans. Plasma Sci.

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This version is available at https://strathprints.strath.ac.uk/64280/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. > REPLACE THIS LINE WITH YOUR PAPER IDENTIFICATION NUMBER (DOUBLE-CLICK HERE TO EDIT) < 1Abstract -Characterisation of a corona-stabilised switch in the single-shot regime, including triggering range, delay times and jitter is reported, over the pressure range 0-3 bar gauge, as a continuation of work from similar characterisation with this switch filled with SF6 with different gap spacings. When filled with mixtures of HFO-1234ze and N2, the breakdown voltage can be increased by up to ~306% and ~191% under negative and positive polarity, respectively, of that using 100% N2. These results were achieved with gas mixtures consisting of 80% N2 and 20% HFO-1234ze, by pressure. The maximum negative polarity triggering range was 13.6 kV, comparable to that achieved previously using SF6. The measured delay time and calculated jitter was generally found to increase with increasing pressure, and with increasing percentage (from 5% to 20%) of HFO-1234ze in the gas mixtures.Von Laue statistical analysis of time-to-breakdown data showed that both the formative time and statistical time increased with increasing pressure, and with increasing percentage of HFO-1234ze in the gas mixtures. The formative time under negative polarity was significantly longer than that for positive polarity.The results indicate that HFO-1234ze may be considered as a suitable candidate to replace SF6 for switching applications, although there are some operational observations that require further investigation.

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“…The determination of the eective ionization rate coecient k e , the electron drift velocity w e and the longitudinal electron diusion coecient ND L using this model was described in detail previously [24]. The quantities k e , w e and ND L depend on the density-reduced electric eld E=N, given in Townsend (1 Td = 10 21 Vm 2 ).…”

Section: Electron Current Analysismentioning

confidence: 99%

Measurement of the electron attachment properties of SF₅CF₃and comparison to SF₆

Chachereau

Franck

2017

J. Phys. D: Appl. Phys.

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The electron attachment properties of are experimentally investigated using a pulsed Townsend setup. Different / and / mixtures, with mole fractions ranging from to 1, are characterized. The effective ionization rate coefficient, electron drift velocity and reduced longitudinal electron diffusion coefficient in these mixtures are obtained. For low mole fractions of , the effective ionization rate coefficient is compared to calculations from available electron scattering cross sections, and is also used for estimating the electron attachment cross section of . For pure , the present data is compared to early data from a steady-state Townsend experiment. The presentation of the measurement results is followed by a discussion on the properties of and and their significance for gaseous electrical insulation.

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Electron swarm parameters of the hydrofluoroolefine HFO1234ze

Cited by 62 publications

References 16 publications

Electron attachment properties of c-C₄F₈O in different environments

Electron attachment properties of c-C₄F₈O in different environments

Characterization and Statistical Analysis of Breakdown Data for a Corona-Stabilized Switch in Environmentally Friendly Gas Mixtures

Measurement of the electron attachment properties of SF₅CF₃and comparison to SF₆

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Electron swarm parameters of the hydrofluoroolefine HFO1234ze

Cited by 62 publications

References 16 publications

Electron attachment properties of c-C4F8O in different environments

Electron attachment properties of c-C4F8O in different environments

Characterization and Statistical Analysis of Breakdown Data for a Corona-Stabilized Switch in Environmentally Friendly Gas Mixtures

Measurement of the electron attachment properties of SF5CF3and comparison to SF6

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Electron attachment properties of c-C₄F₈O in different environments

Electron attachment properties of c-C₄F₈O in different environments

Measurement of the electron attachment properties of SF₅CF₃and comparison to SF₆