Design and Implementation of a Real Time Multi-Coil Amplifier System

Terry W. Nixon¹, Christoph Juchem¹, Scott McIntyre¹, Douglas Lawrence Rothman¹, Robin A. de Graaf¹

A custom Multi Coil Amplifier System (MCAS) was designed and built to drive an array of small electrical coils which are independent of the scanners shim and gradient coils. The system was designed to have up to 96, independent +/- 1A constant current channels. A controller was developed to interface between a host computer and the constant current amplifiers. The controller has independent memory for each channel and was interfaced to the spectrometers pulse programmer to allow rapid amplitude changes enabling both static and dynamic applications.