NDLI: Electrical breakdown of heterogeneous dielectrics under 10 ns high-voltage pulses

Content Provider	IEEE Xplore Digital Library
Author	Vdovin, V. Andreev, V. Kulagin, V.
Copyright Year	2014
Description	Author affiliation: Sternberg Astron. Inst., M.V. Lomonosov Moscow State Univ., Moscow, Russia (Kulagin, V.) \|\| Kotel'nikov Inst. of Radioeng. & Electron., Moscow, Russia (Vdovin, V.) \|\| Fac. of Phys., M.V. Lomonosov Moscow State Univ., Moscow, Russia (Andreev, V.)
Abstract	Electrical breakdown of heterogeneous dielectrics in the form of rock samples was studied. The studies were conducted in an inhomogeneous field using the scheme conical tip - plane. The high-voltage generator of 10 ns pulses duration with a slope of 3 ns rise and peak voltage up to 300 kV was employed. Forms of incident and reflected voltage pulses can be recorded by a coaxial meter, which allowed characterizing breakdown dynamical parameters of the samples. A model of development of the breakdown based on electrostrictive mechanism was proposed. The dynamics of motion of electrons and ions in the micro-cracks formed by high-voltage pulses with nanosecond fronts near impurities in the materials with developed impurity phase was investigated numerically. Characteristic times of microgap crossing and maximum electron energy were determined. For the breakdown field, maximum electron energy can reach tens of electron volts, which causes ionization of atoms of the substance including deep levels. The role of space charge in the electron dynamics was also studied.
Starting Page	481
Ending Page	484
File Size	130214
Page Count	4
File Format	PDF
ISBN	9781467373234
e-ISBN	9781479940479
DOI	10.1109/IPMHVC.2014.7287316
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Electric breakdown nanosecond pulse Ions electrostriction Dielectrics Plasmas Acceleration Dispersion crack formation shock waves
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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