Accession Number:

ADA230194

Title:

Selective Screening of High Temperature Superconductors by Resonant Eddy Current Analysis

Descriptive Note:

Final rept.

Corporate Author:

CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL

Personal Author(s):

Report Date:

1990-11-01

Pagination or Media Count:

12.0

Abstract:

Electromagnetic shielding is often required in the design and construction of Army facilities and equipment to protect electrical systems or electronic components from the effects of unwanted electromagnetic energy. With the discovery of High Transition Critical Temperature Superconducting HiTcS compounds in 1987, researchers immediately sought electromagnetic applications for these novel materials. The purpose of this study was to develop an alternate screening analysis to supplement the traditional resistive methods of assessing HiTcS compounds practically for electromagnetic applications. This report sets forth both the principle and practice of Resonant Eddy Current Analysis RECA and its applicability as a screening agent for prospective High Temperature Superconductors. The RECA methodology can provide an accurate measure of a samples bulk critical density. It is inexpensive, requiring only an inductor, several capacitors, and an impedance meter. Its high intrinsic sensitivity can be maximized. The method provides a definitive signature unique to superconductors undergoing a magnetic phase transition. It does not require the conducting regions of a given sample to be contiguous and can provide valuable sample quality information for properly thermostated samples.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE