NDLI: Measurement of Current-Voltage Curves of Superconducting Tapes by Means of Quasi Trapezoidal Current Impulses

Content Provider	IEEE Xplore Digital Library
Author	Frolek, L. Souc, J.
Copyright Year	2002
Abstract	Nowadays the impulse measurements are taking on higher importance. This is because by means of current impulses it is possible to measure at high currents and low power loading conditions without overheating the sample or measurement equipment. In this article, we present a system enabling to measure current-voltage curves of superconducting tapes with high critical currents and in overcritical current conditions. In our measurements, the current impulses are quasi trapezoidal and include a ramp increase, a plateau and a long ramp decrease. The complete current impulse duration is of the order of ten milliseconds, though the plateau (useful part for the measurement) is of sub-millisecond range. The current derivative in the plateau is zero. Thus, this conditions are comparable with DC ones. A special ladder transmission line was used as high-current generator for shaping impulses with instantaneous currents up to 1.5 kA. A DAQ system with a sampling rate up to 100 kS/s and 24 bits resolution was used for the measurement. The signal processing was realized by software. This method using quasi trapezoidal current impulses was compared with the method of measurement by means of impulses without plateau. Measured current-voltage curves compared with curves obtained by DC measurements are presented, showing a very good agreement.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3581
Ending Page	3584
Page Count	4
File Size	289181
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current measurement Superconducting films Power measurement Transmission line measurements Pulse measurements Critical current Power transmission lines Superconducting transmission lines Data acquisition Signal sampling high-temperature superconductor current impulse current-voltage curve
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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