期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 55, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ac29e7
关键词
high voltage discharge; Boltzmann equation; sulfur hexafluoride
This study demonstrates the accurate calculation of DC breakdown voltage thresholds in complex gas mixtures solely based on elementary electron-neutral interactions using a multi-term Boltzmann equation kinetic model. The effectiveness of the model is benchmarked in SF6:N-2 mixtures in the 100 Td < E/N < 400 Td field regime. The results show that a ten-term BE model yields DC breakdown voltages that agree within 3% of experimental measurements on average. A two-term BE model is also used to evaluate the error introduced by the two-term approximation. The largest discrepancies are observed in pure N-2, with errors greater than 10% for diffusion coefficients, within 6% for specific vibrational rate coefficients, and within 5% for breakdown voltages. However, this error decreases to within 1% for most parameters and breakdown voltages in mixtures with high SF6 content.
The accurate calculation of DC breakdown voltage thresholds solely from elementary electron-neutral interactions in complex gas mixtures using a multi-term Boltzmann equation (BE) kinetic model is demonstrated. SF6:N-2 mixtures in the 100 Td < E/N < 400 Td field regime are explored to benchmark the model's effectiveness. A ten-term BE model is found to yield DC breakdown voltages which, on average, agree within 3% of experimental measurements. A two-term BE model is also applied in order to characterize the error introduced in all calculations by the two-term approximation. These discrepancies are largest in pure N-2 where error is greater than 10% for diffusion coefficients, within 6% for particular vibrational rate coefficients, and within 5% for breakdown voltages. However, this error falls to within 1% for most parameters and breakdown voltages in mixtures with large SF6 content.
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