Introduction Sulfur hexafluoride (SF 6) gas is widely used in circuit breakers and gas-insulated substations, but its use presents safety and environmental challenges when maintenance is needed. Utilities using SF 6 gas have a variety of needs, including best practices for handling SF 6 , new tools for detecting and mitigating leaks, and information on assessing gas purity. In recent years, EPR...

the purpose of the present paper is to develop light beam method to measurement of interfacial area in a rectangular gas-liquid bubble column. total interfacial area can be determined in bubble column filled by transparent liquid by light transmission method. according to pervious researches, the fraction of parallel light is function of interfacial area and optical path length that these two p...

Metal particle contamination is an important reason for insulation failure of gas-insulated transmission lines (GILs). Particle trap the common method suppression. At present, research on motion characteristics metal particles near a and optimization parameters under AC voltage insufficient. Based that, firstly, dynamic model was established, in front were studied, combined with experiments. Th...

Grating-coupler-induced collective intersubband transitions in a quasi-twodimensional electron system are investigated both experimentally and theoretically. Far-infrared transmission experiments are performed on samples containing a quasi-two-dimensional electron gas quantum-confined in a parabolic quantum well. For rectangular shaped grating couplers of different periods we observe a strong d...

The decomposition characteristics of a SF6 gas-insulated medium were used to diagnose the partial discharge (PD) severity in DC gas-insulated equipment (DC-GIE). First, the PD characteristics of the whole process were studied from the initial PD to the breakdown initiated by a free metal particle defect. The average discharge magnitude in a second was used to characterize the PD severity and th...

gas hydrate formation in production and transmission pipelines and consequent plugging of these lines have been a major flow-assurance concern of the oil and gas industry for the last 75 years. gas hydrate formation rate is one of the most important topics related to the kinetics of the process of gas hydrate crystallization. the main purpose of this study is investigating phenomenon of gas hyd...

HELIA is a four stage. 4-MV. 250-kA. 30-ns accelerator used to study the design concepts for Hermes Ill. The accelerator consists of eight pulse forming lines (PFLs) that deliver 1-MV. 125-kA pulses to four linear induction cavities. The cavities are in series. and the voltage addition is accomplished in a coaxial self magnetically insulated transmission line (MITL). A positive polarity experim...