Journal
NUCLEAR FUSION
Volume 56, Issue 6, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0029-5515/56/6/066011
Keywords
intrinsic error field; non-resonant; spectrum analysis; EAST
Categories
Funding
- National Magnetic Confinement Fusion Science Program of China [2013GB102000, 2012GB105000]
- National Natural Science Foundation of China [11205199, 11475224, 11505235, 11475002]
- China Postdoctoral Science Foundation [2015M580557]
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Intrinsic error field on EAST is measured using the 'compass scan' technique with different n = 1 magnetic perturbation coil configurations in ohmically heated discharges. The intrinsic error field measured using a non-resonant dominated spectrum with even connection of the upper and lower resonant magnetic perturbation coils is of the order b(r2,1)/B-T similar or equal to 10(-5) and the toroidal phase of intrinsic error field is around 60 degrees. A clear difference between the results using the two coil configurations, resonant and non-resonant dominated spectra, is observed. The 'resonant' and 'non-resonant' terminology is based on vacuum modeling. The penetration thresholds of the non-resonant dominated cases are much smaller than that of the resonant cases. The difference of penetration thresholds between the resonant and non-resonant cases is reduced by plasma response modeling using the MARS-F code.
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