PPPL-4025 is available in <a href="PPPL-4025.pdf">pdf</a> format (1.1 MB).

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<b>Vessel Eddy Current Measurement for the National Spherical Torus Experiment (NSTX)</b>
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<b>Authors:</b> D.A. Gates, J. Menard, and R. Marsala
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<b>Date of PPPL Report:</b> November 2004
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<b>Published in:</b> Review of Scientific Instruments <b>75</b>:12 (Dec 2004) 5090-5093</p>


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A simple analog circuit that measures the NSTX axisymmetric eddy current distribution has been designed and constructed. It is based on simple circuit model of the NSTX vacuum vessel that was calibrated using a special axisymmetric eddy current code which was written so that accuracy was maintained in the vicinity of the current filaments. The measurement and the model have been benchmarked against data from numerous vacuum shots and they are in excellent agreement. This is an important measurement that helps give more accurate equilibrium reconstructions.




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