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Title: Toroidally Resolved Structure of Divertor Heat Flux in RMP H-mode Discharges on DIII-D

Abstract

As shown on DIII-D edge localized modes (ELMs) can be either completely eliminated or mitigated with resonant magnetic perturbation (RMP) fields. Two infrared cameras, separated 105 degrees toroidally, were used to make simultaneous measurements of ELM heat loads with high frame rates. Without the RMP fields ELMs display a variety of different heat load dynamics and a range of toroidal variability that is characteristic of their 3D structure. Comparing radial averages there is no asymmetry between two toroidal locations. With RMP-mitigated ELMs, the variability in the radially averaged power loads is significantly reduced and toroidal asymmetries in power loads are introduced. In addition to RMP ELM suppression scenarios an RMP scenario with only very small ELMs and very good confinement has been achieved.

Authors:
 [1];  [2];  [3];  [3];  [1];  [4];  [5];  [6];  [2];  [6];  [5];  [7];  [6];  [5];  [2];  [2];  [2];  [8];  [2];  [7] more »;  [6];  [9];  [6];  [10];  [4];  [11] « less
+ Show Author Affiliations
  1. Max-Planck-Institute for Plasmaphysik, EURATOM-Association, Greifswald, Germany
  2. General Atomics, San Diego
  3. Lawrence Livermore National Laboratory (LLNL)
  4. ORNL
  5. University of California, San Diego
  6. General Atomics
  7. Forschungszentrum Julich, Julich, Germany
  8. University of California, Los Angeles
  9. EURATOM / FZ-Juelich, Germany
  10. University of California, San Diego & La Jolla
  11. Sandia National Laboratories (SNL)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1037043
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 19th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI), San Diego, CA, USA, 20100524, 20100528
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASYMMETRY; CAMERAS; CONFINEMENT; DIVERTORS; DOUBLET-3 DEVICE; EDGE LOCALIZED MODES; HEAT FLUX

Citation Formats

Jakubowski, M W, Evans, T E, Fenstermacher, M E, Lasnier, C J, Wolf, R C, Baylor, Larry R, Boedo, J A, Burrell, K H, DeGrassie, J S, Gohil, P, Mordijck, S, Laengner, R, Leonard, A W, Moyer, R A, Petrie, T W, Petty, C C, Pinsker, R I, Rhodes, T L, Schaffer, M J, Schmitz, O, Snyder, P B, Stoschus, H, Osborne, T H, Orlov, D M, Unterberg, Ezekial A, and Watkins, J G. Toroidally Resolved Structure of Divertor Heat Flux in RMP H-mode Discharges on DIII-D. United States: N. p., 2011. Web.
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Jakubowski, M W, Evans, T E, Fenstermacher, M E, Lasnier, C J, Wolf, R C, Baylor, Larry R, Boedo, J A, Burrell, K H, DeGrassie, J S, Gohil, P, Mordijck, S, Laengner, R, Leonard, A W, Moyer, R A, Petrie, T W, Petty, C C, Pinsker, R I, Rhodes, T L, Schaffer, M J, Schmitz, O, Snyder, P B, Stoschus, H, Osborne, T H, Orlov, D M, Unterberg, Ezekial A, & Watkins, J G. Toroidally Resolved Structure of Divertor Heat Flux in RMP H-mode Discharges on DIII-D. United States.
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Jakubowski, M W, Evans, T E, Fenstermacher, M E, Lasnier, C J, Wolf, R C, Baylor, Larry R, Boedo, J A, Burrell, K H, DeGrassie, J S, Gohil, P, Mordijck, S, Laengner, R, Leonard, A W, Moyer, R A, Petrie, T W, Petty, C C, Pinsker, R I, Rhodes, T L, Schaffer, M J, Schmitz, O, Snyder, P B, Stoschus, H, Osborne, T H, Orlov, D M, Unterberg, Ezekial A, and Watkins, J G. 2011. "Toroidally Resolved Structure of Divertor Heat Flux in RMP H-mode Discharges on DIII-D". United States.
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@article{osti_1037043,
title = {Toroidally Resolved Structure of Divertor Heat Flux in RMP H-mode Discharges on DIII-D},
author = {Jakubowski, M W and Evans, T E and Fenstermacher, M E and Lasnier, C J and Wolf, R C and Baylor, Larry R and Boedo, J A and Burrell, K H and DeGrassie, J S and Gohil, P and Mordijck, S and Laengner, R and Leonard, A W and Moyer, R A and Petrie, T W and Petty, C C and Pinsker, R I and Rhodes, T L and Schaffer, M J and Schmitz, O and Snyder, P B and Stoschus, H and Osborne, T H and Orlov, D M and Unterberg, Ezekial A and Watkins, J G},
abstractNote = {As shown on DIII-D edge localized modes (ELMs) can be either completely eliminated or mitigated with resonant magnetic perturbation (RMP) fields. Two infrared cameras, separated 105 degrees toroidally, were used to make simultaneous measurements of ELM heat loads with high frame rates. Without the RMP fields ELMs display a variety of different heat load dynamics and a range of toroidal variability that is characteristic of their 3D structure. Comparing radial averages there is no asymmetry between two toroidal locations. With RMP-mitigated ELMs, the variability in the radially averaged power loads is significantly reduced and toroidal asymmetries in power loads are introduced. In addition to RMP ELM suppression scenarios an RMP scenario with only very small ELMs and very good confinement has been achieved.},
doi = {},
url = {https://www.osti.gov/biblio/1037043}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2011},
month = {Sat Jan 01 00:00:00 EST 2011}
}
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