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Flat lamps generating more than 20 W of average power in the vacuum ultraviolet (VUV; λ ≃ 172 nm) with an efficiency above 10% have been realized, and are now being manufactured. These narrowband (Δλ < 10 nm) lamps produce > 500 W of peak power in ∼100 ns FWHM pulses at a repetition frequency up to 135 kHz.
UHF method is one of the well-known PD measurements and has been applied widely to PD diagnostic system of gas insulated switchgears (GISs). Recently, UHF method is also being applied to power transformers. This paper presents the UHF sensor for PD diagnosis of power transformers. To measure the PD inside of a power transformer, the UHF sensor is mostly mounted inside the oil drain valve of exterior...
Dissolved gas analysis(DGA) is one of the most widely used diagnostic tools to detect and evaluate faults in power transformers for a long time. IEEE Guide C57.104 and IEC Publication 60599 recommend several DGA diagnostic methods used for utilities and most of them are available to classify the different types of faults using gas ratios or %gas. However, the task of DGA interpretation is not easy...
The purpose of this study is to develop a patient-specific dosimetry estimation system in nuclear medicine examination using a SimSET-based Monte Carlo code. We added a dose deposition routine to store the deposited energy of the photons during their flights in SimSET and developed a user-friendly interface for reading PET and CT images. Dose calculated on ORNL phantom was used to validate the accuracy...
Graphene and its derivatives (graphite, CNT) have very high conductivity and critical current density higher than 108 A/cm2, which can be utilized in interconnect applications. Theoretically, a doped graphene is predicted to have better performance than Cu as an interconnect conductor. However, the feasibility of graphene interconnect has not been experimentally examined systematically. In this paper,...
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