Instrumentation techniques for high-temperature superconductor measurement

Author

Guo, Y.S.

Author_Institution

Kansas State Univ., Manhattan, KS, USA

fYear

1994

fDate

20-22 Sep 1994

Firstpage

737

Lastpage

743

Abstract

Methods of measuring the critical temperature T_c, and the critical current I_c for high-temperature superconductors are described. The critical temperature T_c is that at which a normal superconducting transition occurs and is an important parameter in the evaluation of high-temperature superconductors. A four-point resistance measurement is normally used but when the resistance approaches zero, noise and interference dominate the signal. This paper describer how to reduce the noise and interference and extract a signal from the noise. In addition, a new method is described for performing automatic I_c measurements with an oscilloscope or a voltmeter

Keywords

computerised instrumentation; critical current density (superconductivity); electric current measurement; electric resistance measurement; high-temperature superconductors; interference suppression; superconducting transition temperature; T_c measurement; automatic I_c measurement; critical current measurement; critical temperature measurement; high-temperature superconductor measurement; high-temperature superconductors; interference; noise; normal superconducting transition; oscilloscope; voltmeter; Critical current; Current measurement; Electrical resistance measurement; High temperature superconductors; Instruments; Interference; Noise reduction; Superconducting device noise; Superconducting transition temperature; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

AUTOTESTCON '94. IEEE Systems Readiness Technology Conference. 'Cost Effective Support Into the Next Century', Conference Proceedings.

Conference_Location

Anaheim, CA

Print_ISBN

0-7803-1910-9

Type

conf

DOI

10.1109/AUTEST.1994.381543

Filename

381543