Toroidally resolved structure of heat flux in RMP H-mode discharges on DIII-D Page: 3 of 17
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Toroidally resolved structure of heat flux in RMP H-mode discharges on
DIII-DW
M.W. Jakubowski, T.E. Evans3, M.E. Fenstermacher4, C.J. Lasnier4, O. Schmitz2, R.C.
Wolf1, L.B. Baylor, J.A. Boedo5, K.H. Burrell3, J.S. deGrassie3, P. Gohil3, R. Laengner2,
A.W. Leonard3, R.A. Moyers, T.W. Petrie3, C.C. Petty3, R.I. Pinsker3, T.L. Rhodes, M.J.
Schaffer3, P.B. Snyder3, H. Stoschus2, T. Osborne3, D. Orlov5, E. Unterberg3, J.G. Watkins6
1Max-Planck-Institut fur Plasmaphysik, IPP-EURATOM Association, Greifswald, Germany
2Forschungszentrum Julich, IEF-4, Association FZJ-EURATOM, TEC, Julich, Germany
3General Atomics, P.O. Box 85608, San Diego, California, 92186-5608 U.S.A.
4Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94550, U.S.A.
sUniversity of California, San Diego, La Jolla, CA 92093, U.S.A.
6Sandia National Laboratory, Albuquerque, New Mexico, U.S.A.
Abstract
An undesirable consequence of this high confinement is the periodic formation of large
transient power loads to the plasma facing components due to type-I ELMs. As shown on
DIII-D they can be either completely eliminated or mitigated with resonant magnetic
perturbation fields. Application of RMP results in a 3D magnetic topology that affects
heat loads in ELM-suppressed discharges as well as the smaller ELMs seen during
mitigated scenarios. Two infra-red cameras, separated 70 degrees toroidally, were used
to make simultaneous measurements of heat loads with high framing rate of type-I ELMs
and how they are affected by stochastic boundary. Without the RMP fields ELMs display
a variety of different heat load dynamics as measured by two cameras as well as range of
toroidal variability in the deposited energy that is characteristic of their 3D structure. On
tWork supported in part by the US Department of Energy under DE-FC02-04ER54698, DE-AC52-07NA27344
(LLNL), DE-ACO5-000R22725, DE-AC04-94AL85000, and DE-FG02-07ER54917
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Jakubowski, M. W.; Evans, T. E.; Fenstermacher, M. E.; Lasnier, C. J.; Schmitz, O.; Wolf, R. C. et al. Toroidally resolved structure of heat flux in RMP H-mode discharges on DIII-D, article, May 19, 2010; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc863393/m1/3/: accessed July 15, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.