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Abstract #4200

Gradient dB/dt Heating Measurements of Copper, Steel, and Titanium Annuli: Assessment of Measurement Repeatability, and Identification of a Potential Reference Standard

Joel Crane1, Christine Wawrzyn1, William B. Handler1, and Blaine A. Chronik1

1Physics and Astronomy, University of Western Ontario, London, ON, Canada

The purpose of this work is to develop a simple reference standard to be used for gradient-induced heating tests to verify test system operation. A second objective is to provide data on measurement repeatability of heating in these reference objects. Two different dB/dt exposures (270 Hz and 1000 Hz) were used to measure the gradient-induced temperature rise of three MRI compatible metals using a laboratory dB/dt exposure system. Based on the temperature rise, an MRI compatible metal of distinct dimensions and geometry was determined to be most suitable as a dB/dt heating standard across a frequency range of 270-1000 Hz.

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