This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1088/0029-5515/49/9/095013 in citations.
Overview of the results on divertor heat loads in RMP controlled H-mode plasmas on DIII-D
Overview of the results on divertor heat loads in RMP controlled H-mode plasmas on DIII-D
In this paper the manipulation of power deposition on divertor targets at DIII-D by the application of resonant magnetic perturbations (RMPs) for suppression of large type-I edge localized modes (ELMs) is analysed. We discuss the modification of the ELM characteristics by the RMP applied. It is show...
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Personal Name(s): | Jakubowski, M. W. |
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Evans, T.E. / Fenstermacher, M.E. / Groth, M. / Lasnier, C.J. / Leonard, A.W. / Schmitz, O. / Watkins, J.G. / Eich, T. / Fundamenski, W. / Moyer, R.A. / Wolf, R.C. / Baylor, L.B. / Boedo, J.A. / Burrell, K.H. / Frerichs, H. / deGrassie, J.S. / Gohil, P. / Joseph, I. / Mordijck, S. / Lehnen, M. / Petty, C.C. / Pinsker, R.I. / Reiter, D. / Rhodes, T.L. / Samm, U. / Schaffer, M.J. / Snyder, P.B. / Stoschus, H. / Osborne, T. / Unterberg, B. / Unterberg, E. / West, W.P. | |
Contributing Institute: |
Plasmaphysik; IEF-4 JARA-ENERGY; JARA-ENERGY |
Published in: | Nuclear fusion, 49 (2009) S. 095013 |
Imprint: |
Vienna
IAEA
2009
|
Physical Description: |
095013 |
DOI: |
10.1088/0029-5515/49/9/095013 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Nuclear Fusion
49 |
Subject (ZB): | |
Publikationsportal JuSER |
In this paper the manipulation of power deposition on divertor targets at DIII-D by the application of resonant magnetic perturbations (RMPs) for suppression of large type-I edge localized modes (ELMs) is analysed. We discuss the modification of the ELM characteristics by the RMP applied. It is shown that the width of the deposition pattern in ELMy H-mode depends linearly on the ELM deposited energy, whereas in the RMP phase of the discharge those patterns are controlled by the externally induced magnetic perturbation. It was also found that the manipulation of heat transport due to the application of small, edge RMP depends on the plasma pedestal electron collisionality nu(e)*. We compare in this analysis RMP and no RMP phases with and without complete ELM suppression. At high nu(e)* > 0.5, the heat flux during the ELM suppressed phase is of the same order as the inter-ELM and the no-RMP phase. However, below this collisionality value, a slight increase in the total power flux to the divertor is observed during the RMP phase. This is most likely caused by a more negative potential at the divertor surface due to hot electrons reaching the divertor surface from the pedestal area along perturbed, open field lines. |