Presenter Information

Walter Podney, SQM Technology, Inc.

Location

La Jolla, CA

Start Date

1-1-1998 12:00 AM

Description

An ELECTROMAGNETIC MICROSCOPE uses a superconductive quantum interference device (SQUID) to achieve high resolution1 at low frequencies (≲ 100 Hz), for deep, pulsed, eddy current evaluation of airframes [1–3]. A test bed instrument, operating at ∼5 Kelvin, uses a reflection type probe with a superconductive source coil and a superconductive pickup coil that couples inductively to a remote SQUID. The SQUID measures change in mutual inductance2 between the source and pickup coils, measured in picohenries (pH).

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

17A

Chapter

Chapter 4: NDE Sensors and Fields

Section

Electromagnetic Sensors

Pages

1017-1024

DOI

10.1007/978-1-4615-5339-7_131

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Electromagnetic Microscope for Low Frequency, Pulsed, Eddy Current Evaluation of Airframes

La Jolla, CA

An ELECTROMAGNETIC MICROSCOPE uses a superconductive quantum interference device (SQUID) to achieve high resolution1 at low frequencies (≲ 100 Hz), for deep, pulsed, eddy current evaluation of airframes [1–3]. A test bed instrument, operating at ∼5 Kelvin, uses a reflection type probe with a superconductive source coil and a superconductive pickup coil that couples inductively to a remote SQUID. The SQUID measures change in mutual inductance2 between the source and pickup coils, measured in picohenries (pH).