A positive synergy in the electric strength was observed in a previous study in SF6/HFO1234ze(E) mixtures which was shown to result from a strong electron energy moderation capability of HFO1234ze(E) combined with thermal electron attachment of SF6 [1]. In the present work, the electron energy moderation properties of compounds having similar C=C-C backbone is investigated. Swarm and breakdown measurements are performed in pure gases and in mixtures with SF6. Compounds having a trifluoromethyl group (-CF3) showed lower characteristic energy and as a consequence a positive synergism with SF6. Descriptors related to electron energy moderation are identified and computed; a clear trend is found from the analysis of descriptors related to inelastic processes which suggest(s) that vibrational excitations may be the main source of electron energy loss in the compounds showing positive synergy.
Effective ionization rate, bulk drift velocity and bulk longitudinal diffusion coefficient for electron swarms in mixtures consisting of either C4F7N or C5F10O in atmospheric gases - CO2, N2 and O2 are measured using a Pulsed Townsend setup. Measurements are carried out between 100 Td and 1800 Td.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.