Total electron scattering cross section of C3F6O at the intermediate-energy region for developing an alternative insulation gas to SF6

Perfluoro methyl vinyl ether (C3F6O) is a promising alternative gas to SF6 for switching applications in the power industry. We measured the total electron scattering cross section (TCS) of C3F6O in the intermediate energy region from 15 to 90 eV using a magnetized electron beam apparatus. The overall TCS values were less than 20.8 x 10(-16) cm(2) within the measuring energy region. The measured and observed TCS exhibited some features, a steep increase before 30 eV, the highest value near 30 eV, and a gradual decrease after 30 eV. The total un-certainty was evaluated as 3.5-8.5%, depending on the incident electron energies. These first measurement data of C3F6O are useful for understanding both the discharging characteristics and identifying the insulation prop-erties and arc-extinguishing.