Critical Current in YBCO Coated Conductors in the Presence of a Macroscopic Defect (POSTPRINT)

Abstract

We have studied the effects of localized defects in the YBCO coated conductors on the critical current. The artificial defects were introduced into 4, 10 and 12 mm wide tapes as cuts of various lengths made either by laser ablation or mechanical means. Transport measurements were carried out in an external variable magnetic field to obtain the I-V characteristics of the damaged areas. The distribution of the magnetic field in the vicinity of the defects has been mapped as well. The reduction of the critical current by the defects, with and without an external DC magnetic field are discussed and compared with existing theories. A criterion for determining the critical current in the area containing a defect is suggested.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2010
Accession Number
ADA520925

Entities

People

  • George A. Levin
  • Milan Polak
  • Paul N. Barnes
  • Pavol Mozola

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ablation
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Current Density
  • Electric Fields
  • Electrical Engineering
  • Electronic Mail
  • Energy
  • Magnetic Fields
  • Measurement
  • Military Research
  • Resistance
  • Superconductivity
  • Superconductors
  • Transport Ships
  • United States

Fields of Study

  • Physics

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Superconducting Magnet Technology
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition