Double-layers sDLsd were observed in the expanding region of an inductively coupled plasma with Ar–SF6 gas mixtures. No DL was observed in pure argon or SF6 fractions below a few percent. They exist over a wide range of power and pressure although they are only stable for a small window of electronegativity stypically between 8% and 13% of SF6 at 1 mTorrd, becoming unstable at higher electroneg...

SF6 is a gas with excellent dielectric properties and is commonly used in gas-insulated equipment. However it has the high global warming potential. Thus, the development of new gases or gas mixtures for GIS, GIL is strongly desired. For dimensioning the gas insulated systems the support insulators (spacers) are of special interest. Contaminations on the insulator surface can cause field distor...

CASE REPORT Hydrops occurring in the eye secondary to keratoconus, grade 4. It was managed by sulfur hexafluoride (SF6) gas injected into the anterior chamber, with an early resolution of corneal edema obtained. DISCUSSION Intervention with intracameral SF6 injection has proven to be a safe and effective therapy for early reduction of corneal edema in an eye with Descemet's membrane detachmen...

Sulphur hexafluoride (SF6) is an inert and non-toxic gas with excellent properties for arc quenching and electrical insulation applications. The main drawback is its high greenhouse potential. In high voltage apparatuses it is used in sealed volumes e.g. in the interrupting chamber of a circuit breaker. Even so, through flanges and o-rings we encounter always a small amount of gas leakage. Ther...

A recently reported intermolecular potential for SF6, featuring exchange, dispersion, and electrostatic terms, is used to determine minimum energy structures of homogeneous SF6 clusters up to the decamer. By adding appropriate interaction terms, also structures of mixed (SF6)2-Arn clusters are calculated. A second order line shift formalism, treating the anharmonic intramolecular force field an...

PURPOSE To report an unusual complication of treatment in the case of a Descemet's membrane detachment. METHODS Observational case report. RESULTS A 79-year-old woman presented for elective cataract surgery. Ocular risk factors identified preoperatively included moderately shallow anterior chambers bilaterally, previously treated with bilateral YAG peripheral iridotomies. After a clear corn...

Vital capacity single-breath washouts using 90% O2-5% He-5% SF6 as a test gas mixture were performed with subjects sitting on a stool (upright) or recumbent on a stretcher (prone, supine, lateral left, lateral right, with or without rotation at end of inhalation). On the basis of the combinations of supine and prone maneuvers, gravity-dependent contributions to N2 phase III slope and N2 phase I...

In the search to obtain a better understanding of switching arc phenomena in the current intemrption, our attention has been focused on the study of arc plasma behavior in the alternative current circuit breaker. In this paper a comparison between intemrption capability of sulfur hexafluoride (SF6) and nitrogen (Nz) ballast arcs are made and we present physical aspects and characteristics of ar...