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IEEE Transactions on Electrical Insulation

Issue 3 • Date June 1983

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Displaying Results 1 - 25 of 34
  • IEEE Transactions on Electrical Insulation

    Publication Year: 1983, Page(s): c1
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    Freely Available from IEEE
  • IEEE electrical Insulation Society

    Publication Year: 1983, Page(s): c2
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    Freely Available from IEEE
  • Xth International Symposium on Discharges and Electrical Insulation in Vacuum

    Publication Year: 1983, Page(s): 193
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    Freely Available from IEEE
  • Prebreakdown Electron Emission

    Publication Year: 1983, Page(s):194 - 203
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3441 KB)

    Recent evidence suggests that the prebreakdown currents that flow between vacuum-insulated high voltage electrodes frequently originate from a non-metallic emission mechanism which is thought to be assocaited with some form of insulating/ semiconducting surface oxide or impurity concentration. This paper develops this theme by giving a brief review of the growing body of experimental evidence that... View full abstract»

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  • Prebreakdown Field Emission Current and Breakdown Mechanism of a Small Vacuum Gap

    Publication Year: 1983, Page(s):204 - 208
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1804 KB)

    Breakdown voltage and prebreakdown current between parallel plane copper electrodes in a vacuum were measured in the gap range from 0.002 to 0.2 mm using an impulse voltage of 550×5000 ¿s. Breakdown field strength, effective field enhancement factor, and field emission current just prior to breakdown were ascertained as a function of gap spacing. With a decrease in the gap spacing from 0.2 mm, t... View full abstract»

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  • The Dectection of Microparticle-Induced Breakdowns Using a Twin-Beam Laser Scattering System

    Publication Year: 1983, Page(s):209 - 213
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (817 KB)

    Microparticles with radii less than 0.5 ¿m have been observed in a HV vacuum gap using a twin beam laser light scattering technique. For the geometry and electrode material used it has been shown that 97% of the particles travel from anode to cathode. Investigation of the correlation between the time of cathode impact and the time of breakdown indicates that most of the breakdowns are induced by ... View full abstract»

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  • Spectroscopic Measurement of Anode Spot Temperature in Vacuum Prebreakdown

    Publication Year: 1983, Page(s):214 - 217
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1068 KB)

    The temperature of a prebreakdown vacuum anode spot has been measured in the visible region by a black body radiation method, hereafter called ¿¿spectral pyrometry¿¿. A special spectrometer was designed for this experiment. It uses a circular graded spectrum filter turning around its axis with a velocity of 3000 rpm. It is then possible to analyze incident radiation with 12 nm resolution and the s... View full abstract»

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  • Explosive Processes on the Cathode in a Vacuum Discharge

    Publication Year: 1983, Page(s):218 - 225
    Cited by:  Papers (9)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2433 KB)

    Investigations concerning nanosecond processes in vacuum discharges are described. The role of explosive processes at the cathode has been established. Experimental results concerning breakdown voltage, discharge current temporal behavior, delay time, spark-to-arc transition time, X-ray radiation, and electrode erosion are reported. The general characteristics of the fast breakdown process are dis... View full abstract»

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  • Current Evolution in a Pulsed Overstressed Radial Vacuum Gap

    Publication Year: 1983, Page(s):226 - 229
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1654 KB)

    The evolution of current in a radial, two element, vacuum gap has been studied as a function of applied voltage. Gap spacings of 1 and 2 mm, between coaxial brass electrodes, at a pressure of 1×10-2 Pa, have been used. Voltage pulses between 20 kV and 176 kV, with 15 ns risetimes and 50 ns durations, have been applied to the vacuum gap using a water-filled Blumlein generator having a source imped... View full abstract»

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  • Photographic Observations of Breakdown Mechanism in Vacuum

    Publication Year: 1983, Page(s):230 - 233
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1982 KB)

    The results of a high-speed photographic study of the initial stages of discharge development in a point-to-plane gap in vacuum are presented. An image converter camera operating, in a streak mode, up to a speed of 1 mm/ns was used in conjunction with an image intensifier. The first detectable light always appeared at the cathode. The light originating at the anode appears to be from a plasma expa... View full abstract»

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  • Breakdown of a Coaxial Diode Transverse to a Uniform Magnetic Field

    Publication Year: 1983, Page(s):234 - 237
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1247 KB)

    The breakdown of a coaxial diode transverse to a uniform magnetic field is an obstacle for the use of these devices for the microsecond range of pulse durations. A model of the breakdown was developed [1,2] that takes into account the evolution of cathode plasma from isolated emission sites into a closed plasma layer around the cathode in which a centrifugal instability subsequently develops. In t... View full abstract»

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  • Breakdown Time of a Triggered Vacuum and Low-Pressure Switch

    Publication Year: 1983, Page(s):238 - 242
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (686 KB)

    Characterization of a triggered vacuum and lowpressure switch has been performed with breakdown performance data obtained for different trigger locations and current levels, gas pressures, and main gap voltages and currents. Results presented reveal a dependence of breakdown, or switch closure time, on the switched current level, rather than main gap voltage, for gap spacings from 1.5 to 10 mm. Br... View full abstract»

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  • Review of Present Understanding of Electrode Phenomena

    Publication Year: 1983, Page(s):243 - 252
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2839 KB)

    Electrode phenomena describing the current transition from an ionized gas to a solid body occur in many forms and are of great practical importance. Since 1972 researchers from industry, research institutes, and universities gathered in a regular series of workshops for mutual information and organized preparation of future activities. This report summarizes experiences collected during the ¿¿Vth ... View full abstract»

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  • Enhanced Electron Emission and Its Reduction by Electron and Ion Impact

    Publication Year: 1983, Page(s):253 - 261
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3963 KB)

    Broad area electrodes show enhanced electron emission at fairly low dc and rf fields E ~ 107 V/m, thus preventing the attainment of higher electric field strengths E. The enhanced electron emission is initiated by hot electrons, which gained their energy fdxeE in dielectrics (¿dust¿). Due to their excess energy, hot electrons have an enhanced emission probability, which is enhanced further by re... View full abstract»

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  • Influence of Electropolishing Cu and Al Electrodes on Predischarge Phenomena and Breakdown of Vacuum Gaps

    Publication Year: 1983, Page(s):262 - 266
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (750 KB)

    Results of an experimental investigation of predischarge charge phenomena and electrical strength of a vacuumgap between copper and aluminum electropolished electrodes are presented. The optimal technological parameters of the electropolishing process and some criteria of electrode surface evaluation have been determined. It is shown that the electropolishing of electrodes improves the electrical ... View full abstract»

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  • The Influence of Preparatory Furnacing of Electrodes on Vacuum Breakdown

    Publication Year: 1983, Page(s):267 - 271
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    The relative importance of prefiring of copper electrodes in hydrogen or vacuum, as well as that of varying their area, on the determination of the vacuum insulation strength has been investigated using the factorial design technique of experimentation. In the gap range from 0.5 to 3.0 cm, at 6×10-7 Pa, control of this prefiring process led to results with an extremely high degree of confidence d... View full abstract»

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  • Variation of Mass Spectral Line Intensity with Field and Electrode Conditions

    Publication Year: 1983, Page(s):272 - 276
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (723 KB)

    An analysis was made of the mass of carriers produced in a vacuum gap under a steady state prebreakdown condition. In order to transport these carriers to a mass analyzer, the cathode probe hole technique is adopted. The configuration of the test electrodes is plane parallel, and the gap length is 0.07 mm. The electrode materials used are Al and Cu. A time-of-flight (TOF) type of mass analyzer wit... View full abstract»

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  • High Speed Photography of Surface Flashover across a Divided Insulator in Vacuum

    Publication Year: 1983, Page(s):277 - 279
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    The results of photographic observations of arc development across a divided insulator in vacuum are presented. It is shown that, for a composite insulator of three sections, the time difference between the flashover of the sections is less than the limit of resolution of the camera, that is, much less than one nanosecond. View full abstract»

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  • Predischarge Current Measurements in Vacuum Gaps Bridged with Plexiglas Insulators

    Publication Year: 1983, Page(s):280 - 286
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2679 KB)

    Predischarge currents have been observed for Plexiglas® insulators subjected to 60 Hz ac voltages. The predischarges currents were continuous and appeared at voltages much less than the breakdown voltage and were similar in shape and magnitude for both voltage polarities. The predischarge current peaks did not align with the excitation voltage peaks. The current peaks always appeared prior to the... View full abstract»

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  • Surface Processes Occurring during Breakdown of High-Voltage Devices

    Publication Year: 1983, Page(s):287 - 291
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1320 KB)

    In order to understand the breakdown phenomena on insulators, we create in the amorphous SiO2 sample a permanent localized charge which is either negative (implanted electrons) by electron bombardment, or positive (implanted holes), by bombardment with helium metastable atoms and photons. The implanted negative charge is destroyed when another part of the sample is bombarded. This remote neutraliz... View full abstract»

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  • Effect of DC Pre-Stress on AC and DC Surface Flashover of Solid Insulators in Vacuum

    Publication Year: 1983, Page(s):292 - 300
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1659 KB)

    The dc, ac (60 Hz) and ac superimposed on dc surface flashover of Teflon® (¿r = 2.2), quartz-silica (¿r = 3.8) and glass-ceramic (¿r = 3.8) is investigated in vacuum prior to and following the application of a dc pre-stress. The surface flashover is measured at ~ 300 K, at a residual gas pressure of <10-8 Torr (< 10-6 Pa) after the solid insulators have been thoroughly degassed at elevated tem... View full abstract»

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  • Electric Surface Strength and Surface Deterioration of Thermoplastic Insulators in Vacuum

    Publication Year: 1983, Page(s):301 - 309
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4851 KB)

    Investigations have been made of various factors which effect the surface flashover strength across thermoplastic insulators in vacuum. The factors studied, for ac and dc excitation, included the dependence of flashover voltage on specimen length, metallization of the insulator ends, specimen conditioning under dc and ac voltages, and residual gas pressure. The influence of the number of sequentia... View full abstract»

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  • Pulse Flashover of Solid Dielectrics in Vacuum

    Publication Year: 1983, Page(s):310 - 314
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (777 KB)

    In an effort to understand the mechanisms which lead to changes in the surface flashover potential of insulators used in high power spark gaps a systematic study of the flashover potential of various organic insulators was undertaken. The flashover potential of these insulators was measured both before and after they had been exposed to the by-products of an arc from a surface discharge ignitor pl... View full abstract»

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  • The Breakdown of High-Voltage Discharge Neutron Tubes

    Publication Year: 1983, Page(s):315 - 321
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    High voltage breakdown occurs in neutron tubes, as well as in many vacuum devices. For practical reasons, it is important to know the origin of the breakdown. So, an experimental investigation has been performed on diode devices under a few ps pulse condition. Conditioning and deconditioning phenomena have been characterized, the arcing rate was considered from a probability point of view for a gi... View full abstract»

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  • Electrostatic Deflectors for Luminosity Measurements at the Cern pp Collider

    Publication Year: 1983, Page(s):322 - 324
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (461 KB)

    Electrostatic deflectors are used in the CERN SPS Collider to separate the orbits of protons and antiprotons. The total installation comprises 4 tanks, 3 m long each, with a vacuum of 10-8 Pa after baking. The operating electric field is 50 kV/cm across a gap of 4 cm, between 3 m long titanium electrodes; the spark rate does not exceed 2 per 24 hours. The construction, the HV circuit, and the perf... View full abstract»

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Aims & Scope

This Transactions ceased production in 1993. The current retitled publication is  IEEE Transactions on Dielectrics and Electrical Insulation.

Full Aims & Scope