NDLI: Space charge measurements by the alternating thermal wave method: thermal analysis and simulations for data processing improvement

Content Provider	IEEE Xplore Digital Library
Author	Reboul, J.M. Mady, F.
Copyright Year	2004
Description	Author affiliation: Caen Univ., Cherbourg, France (Reboul, J.M.)
Abstract	Since more than 25 years, various nondestructive methods for space charge measurements have been developed in many laboratories. The presence of space charge in insulating structures is recognized to be a proof of weakness and an initiating factor to fatal breakdowns. The present work deals with the recent improvements of the Alternating Thermal Wave Method (ATWM), a technique we finalized for space charge measurement in dielectric films for capacitors. We recall the experimental protocol. The thermal wave is produced by a thermo-electrical module applied on one face of the film. Attenuated sinusoidal temperature waves penetrate by conduction into the sample. The wavelength and the attenuation factor depend on frequency and thermal properties of the material. Evidently, only the space charges within the penetration depth of the thermal wave are concerned with the induced pyroelectric current and may be evaluated. Our purpose is to scan the successive thickness layers by using increasing penetration depths. The cross checking of information at several wave frequencies, taking into account a wave efficiency function, and the use of an adapted mathematical model for the electric field representation increase the accuracy of the method. We give numerical simulations in order to show the new resolving power of our technique.
Sponsorship	IEEE Dielectrics and Elec. Insulation Soc
Starting Page	256
Ending Page	259
File Size	285487
Page Count	4
File Format	PDF
ISBN	0780383486
DOI	10.1109/ICSD.2004.1350339
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-05
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Space charge Current measurement Charge measurement Analytical models Data processing Frequency Laboratories Dielectrics and electrical insulation Electric breakdown Dielectric measurements
Content Type	Text
Resource Type	Article

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