Non-destructive testing (NDT) of metal cracks using a high Tc rf-SQUID and eddy current method
- Midwest Superconductivity Inc., Lawrence, KS (United States); and others
A SQUID is the most sensitive device to detect change in magnetic field. A non-destructive testing (NDT) device using high temperature SQUIDs and eddy current method will be much more sensitive than those currently used eddy current systems, yet much cheaper than one with low temperature SQUIDs. In this paper, we present our study of such a NDT device using a high temperature superconducting rf-SQUID as a gradiometer sensor. The result clearly demonstrates the expected sensitivity of the system, and indicates the feasibility of building a portable HTS SQUID NDT device with the help from cryocooler industry. Such a NDT device will have a significant impact on metal corrosion or crack detection technology.
- Research Organization:
- National Aeronautics and Space Administration, Washington, DC (United States); National Aeronautics and Space Administration, Houston, TX (United States). Lyndon B. Johnson Space Center
- OSTI ID:
- 121649
- Report Number(s):
- CONF-940627--Vol.2; ON: TI95017155
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-{Tc} rf SQUID magnetometers
A simplified HTc rf SQUID to analyze the human cardiac magnetic field