# Electron Impact Cross Sections and Transport Studies of C\({}_{3}\)F\({}_{6}\)[PERSON]
## 4 Conclusions  
This paper reports the first low-energy electron scattering and transport data for perfluoro-methyl-vinyl-ether (PMVE) with the chemical formula C\({}_{3}\)F\({}_{6}\)O. The scattering cross sections were computed using the QUANTUM-EC software and BEB code. The input files for both calculations were prepared using the GAUSSIAN 09 software. In this way, a complete cross section set was obtained for this molecule. Our main aim was to analyze the suitability of this new gas as a replacement for SF\({}_{6}\) in plasma applications. For this, we determined the transport parameters, such as the drift velocity, diffusion coefficient, and critical field strength, for PMVE. These parameters were determined using the BOL-SIG+ software for the spatial growth case, which corresponds to steady-state Townsend experimental conditions. The (E/N)\({}_{crit}\) for C\({}_{3}\)F\({}_{6}\)O was 475 Td, whereas for SF\({}_{6}\), it was 355 Td. Further, the drift velocity of C\({}_{3}\)F\({}_{6}\)O was twice that of SF\({}_{6}\) and the diffusion coefficient was also \(\sim\)4 times lower when compared to SF\({}_{6}\). The comparison of these parameters with those of SF\({}_{6}\) indicates a better performance of PMVE over SF\({}_{6}\) in the plasma fields. We then studied the effect on the insulation performance due to the addition of different buffer gases. These characteristic parameters were further used to study the synergistic effect in the mixtures. The presence of synergistic phenomena is important for a better breakdown quality of the mixture in the considered application. Motivated by this, we derived the Paschen curve for different pure gases and mixtures. The breakdown voltage of PMVE was lower than that of SF\({}_{6}\). Moreover, the addition of buffer gases increased the voltage, and the best output was obtained when N\({}_{2}\) was used as the buffer gas. A mixture containing \(\geq\)99% of N\({}_{2}\) or \(\leq\)1% of C\({}_{3}\)F\({}_{6}\)O gave a better breakdown characteristic than that of SF\({}_{6}\). Any proportion \(\geq\)90% of N\({}_{2}\) or \(\leq\)10% of C\({}_{3}\)F\({}_{6}\)O is suitable in the higher pressure ranges. The usage of O\({}_{2}\) is not helpful to improve the breakdown feature. CO\({}_{2}\) as a buffer gas exhibited good breakdown properties only when the \(pd\) value was very low. Hence, we suggest using N\({}_{2}\) as the buffer gas for PMVE gas. In conclusion, we encourage the use of C\({}_{3}\)F\({}_{6}\)O or PMVE as a replacement gas in plasma applications. The gas has a 0.004 GWP and, to the best of our knowledge, it is the most eco-friendly gas among the other available or proposed alternative gases, such as CF\({}_{4}\), CF\({}_{3}\)I, c-C\({}_{4}\)F\({}_{8}\), C\({}_{4}\)F\({}_{7}\)N, C\({}_{4}\)F\({}_{8}\)O, C\({}_{5}\)F\({}_{10}\)O, C\({}_{6}\)F\({}_{12}\)O, and others (see Table 1 in [4]). Its band gap is higher than other alternative gases, except for c-C\({}_{4}\)F\({}_{8}\), which demonstrates its better chemical stability. Considering the dielectric strength, it is lesser than the recently introduced C5-, C6-perfluoroketones, and C4-perfluoronitrile. However, its excellent environmental index along with its better insulation performance than SF\({}_{6}\) will give a balanced solution to the considered problem. The present work demonstrates that the gas has a considerably higher critical dielectric strength as compared to SF\({}_{6}\). Further, the addition of N\({}_{2}\) as a buffer gas brings the breakdown properties to a similar range to that of pure SF\({}_{6}\). We look forward to experimental efforts to measure the transport and breakdown parameters reported here. The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app132312612/s1](https://www.mdpi.com/article/10.3390/app132312612/s1)]([https://www.mdpi.com/article/10.3390/app132312612/s1](https://www.mdpi.com/article/10.3390/app132312612/s1)). Conceptualization, M.-Y.S. and K.-D.S. ; data curation, N.S. ; formal analysis, N.S. ; funding acquisition, M.-Y.S.