PPPL-4117 is available in <a href="PPPL-4117.pdf">pdf</a> format (2.5 MB).

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<b>Using E-beam Mapping
to Detect Coil Misalignment in NCSX</b>
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<b>Authors:</b> E. Fredrickson, A. Georgiyevskiy, V. Rudakov, and M.C. Zarnstorff
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<b>Date of PPPL Report:</b> October 2005
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<b>Presented at:</b> the Fifteenth International Stellarator Workshop, 3&ndash;7 October 2005, Madrid, Spain. </p>


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Following assembly of the NCSX device, a program of e-beam mapping experiments is planned to validate the accuracy of the construction and assembly of the NCSX coil systems. To aid in the development of requirements for the e-beam mapping hardware and machine requirements, simulations of the e-beam mapping experiments, including various coil misalignments, have been done. The magnetic flux surface configuration was constructed using a numerical code, based on the Biot-Savart law, to calculate the magnetic field components and trace the field line trajectory many times around the torus. Magnetic surfaces are then mapped by recording the field line intersections with toroidal cross-sections of the magnetic system, much as in an actual e-beam mapping experiment.





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