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Title: Apparatus and method for measuring critical current properties of a coated conductor

Abstract

The transverse critical-current uniformity in a superconducting tape was determined using a magnetic knife apparatus. A critical current I.sub.c distribution and transverse critical current density J.sub.c distribution in YBCO coated conductors was measured nondestructively with high resolution using a magnetic knife apparatus. The method utilizes the strong depression of J.sub.c in applied magnetic fields. A narrow region of low, including zero, magnetic field in a surrounding higher field is moved transversely across a sample of coated conductor. This reveals the critical current density distribution. A Fourier series inversion process was used to determine the transverse J.sub.c distribution in the sample.

Inventors:
 [1];  [2]
  1. Los Alamos, NM
  2. Dresden, DE
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1067336
Patent Number(s):
8228055
Application Number:
12/560,303
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Mueller, Fred M, and Haenisch, Jens. Apparatus and method for measuring critical current properties of a coated conductor. United States: N. p., 2012. Web.
Mueller, Fred M, & Haenisch, Jens. Apparatus and method for measuring critical current properties of a coated conductor. United States.
Mueller, Fred M, and Haenisch, Jens. Tue . "Apparatus and method for measuring critical current properties of a coated conductor". United States. https://www.osti.gov/servlets/purl/1067336.
@article{osti_1067336,
title = {Apparatus and method for measuring critical current properties of a coated conductor},
author = {Mueller, Fred M and Haenisch, Jens},
abstractNote = {The transverse critical-current uniformity in a superconducting tape was determined using a magnetic knife apparatus. A critical current I.sub.c distribution and transverse critical current density J.sub.c distribution in YBCO coated conductors was measured nondestructively with high resolution using a magnetic knife apparatus. The method utilizes the strong depression of J.sub.c in applied magnetic fields. A narrow region of low, including zero, magnetic field in a surrounding higher field is moved transversely across a sample of coated conductor. This reveals the critical current density distribution. A Fourier series inversion process was used to determine the transverse J.sub.c distribution in the sample.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {7}
}

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Works referenced in this record:

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journal, June 2005


Comparison of small-field behavior in Mg B 2 , Low- and high-temperature superconductors
journal, February 2006


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Reel-to-reel critical current measurement of coated conductors
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Position and Magnetic Field Angle Dependent $I_{\rm c}$ for Long-Length Coated Conductors
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Modeling High-Temperature Superconducting Tapes by Means of Edge Finite Elements
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journal, August 2001


Loss in a striated coated conductor
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Progress in AMSC scale-up of second generation HTS wire
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Critical Persistent Currents in Hard Superconductors
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Assessment of the local supercurrent densities in long superconducting coated conductors
journal, January 2007