1. Evaluating Impact of TF Coil Deformations Under EM Load on Magnetic Field Quality Coil Deformations provided by Len Myatt’s ANSYS Structural Analysis of New TF for 5 Cases: –Cooldown Only –Cooldown + TF @ 0.5T –Cooldown + 1.7T Ohmic –Cooldown + 2 T High  –Cooldown + Equilibrium ID 7 Data Sorted and Converted to Filament Coil Format to produce Error Field from EM Deformation –Cooldown Only deformation subtracted from Cooldown + EM deformations Coil Sets run thru VACISLD Code to assess resonant field errors and impact on Magnetic Island size Conclusion: No Significant Impact –Worse Case Islands ~ 1.2% Total Flux for EQ ID 7 –Other operating scenarios significantly less than 1%

2. No Significant Impact of TF Deformation Under EM Loading on Magnetic Islands in Plasma Worse Case “Eq ID7” not a true operating point, but would still be acceptable Note: Islands are measured with respect to the VMEC M50 Plasma Equilibrium TF Deformations from Len Myatt’s Oct 25, 2004 Analysis

3. Unsorted Ansys Element Centroid Data

4. Sorted Ansys Element Centroid Data