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Abstract #1021

Thermal Characterization of an All Hollow Copper Insertable Head Gradient Coil

Trevor Paul Wade 1,2 , Andrew Alejski 1 , Janos Bartha 1 , Dina Tsarapkina 2 , Brian K. Rutt 3 , and Charles A. McKenzie 2

1 Robarts Research Institute, Western University, London, Ontario, Canada, 2 Medical Biophysics, Western University, London, Ontario, Canada, 3 Radiology, Stanford University, Stanford, CA, United States

An insertable head gradient coil, with a target strength of 120 mT/m, was designed and built using hollow copper tubing for all axes to maximize its thermal capability. To establish a safe threshold with respect to temperature, internal and surface temperatures were monitored using thermocouples and a thermal camera while the coil was powered with up to 150amps DC and simultaneously cooled with 15C water at 8.6 L/min. The maximum observed surface temperature rise was 10C, the response roughly similar for each axis. Assuming a safe limit of 30C rise, the coil should be able to operate at 49mT/m RMS.

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