Zobrazeno 1 - 10
of 70
pro vyhledávání: '"T.V. Blalock"'
Publikováno v:
IEEE Transactions on Nuclear Science. 44:303-307
The suitability of several on-chip constant-fraction discriminator (CFD) shaping methods for use in the multichannel PHENIX Lead-Scintillator detector has been investigated. Three CFD circuits utilizing a distributed R-C delay-line, a lumped-element
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 3:515-522
A detection system has been developed to seek signals associated with water treeing. In this paper, Part 1 of two parts, the test system is found able to detect fast pulses generated by charges as small as 1.2 fC and slow pulses with current amplitud
Autor:
A.L. Wintenberg, H. Yamashita, Edward F. Kelley, T.V. Blalock, C. Fenimore, K.L. Stricklett, Igor Alexeff, M.O. Pace
Publikováno v:
IEEE Transactions on Electrical Insulation. 26:692-698
Partial discharges are observed in hexane by shadow photography under the application of DC voltages. A nonuniform field geometry is used and the growth of cavities associated with partial discharges at a point cathode was photographed at 200* magnif
Publikováno v:
1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena.
Autor:
T.V. Blalock, C. Fenimore, A.L. Wintenberg, Edward F. Kelley, M.O. Pace, H. Yamashita, Gerald J. FitzPatrick
Publikováno v:
Conference on Electrical Insulation and Dielectric Phenomena.
The pressure dependence of partial discharges (PD) has been experimentally investigated at a needle electrode in hexane from subatmospheric pressure (near hexane vapor pressure) to several atmospheres. Each PD produces a phase transition in the liqui
Publikováno v:
Conference Record of the 1988 IEEE International Symposium on Electrical Insulation.
Results of prebreakdown current measurements made with a low-noise, high-bandwidth preamplifier (0.4- mu A minimum detectable current and 58-MHz bandwidth) are summarized. These waveforms demonstrate that low-noise, high-bandwidth preamplifiers are n
Effects of pressure near one atmosphere on prebreakdown current pulses at a needle cathode in hexane
Publikováno v:
Conference Record of the 1988 IEEE International Symposium on Electrical Insulation.
Prebreakdown current pulses at a point cathode in highly purified liquid hexane have been observed to be affected by hydrostatic pressure from below one atmosphere to several atmospheres. Previously, careful combination of low-noise, high-bandwidth d
Publikováno v:
[Proceedings] 1992 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena.
Polyethylene samples, printed in one region with needles to greatly accelerate water treeing, were exposed to high voltage (60 Hz AC and DC) and a water treeing solution. A very-low-noise, wide-bandwidth detection system was developed to monitor sign
Publikováno v:
Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93).
A computer simulation is performed on the expansion of a low-density region (LDR) at the cathode in stressed hexane, and on the subsequent production of current pulses. Parameters are chosen to give good agreement with several experimental observatio
Publikováno v:
IEEE International Symposium on Electrical Insulation.
The development of a measurement system optimized for making low-noise, high-bandwidth measurements of prebreakdown currents in liquid dielectrics under DC stress is described. The system consists of a 90-MHz bandwidth transimpedance amplifier with a