3D simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENE

Lore, J. D.; Reinke, M. L.; Brunner, D.; LaBombard, B.; Lipschultz, B.; Terry, J.; Pitts, R. A.; Feng, Y.

doi:10.7910/DVN/ON9P44

Title: 3D simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENE

Dataset
Other Related Research

Abstract

Experiments in Alcator C-Mod to assess the level of toroidal asymmetry in divertor conditions resulting from poloidally and toroidally localized extrinsic impurity gas seeding show a weak toroidal peaking (~1.1) in divertor electron temperatures for high-power Enhanced D-alpha H-mode plasmas. This is in contrast to similar experiments in Ohmically heated L-mode plasmas, which showed a clear toroidal modulation in the divertor electron temperature. Modeling of these experiments using the 3D edge transport code EMC3-EIRENE [Y. Feng, et al., J. Nucl. Mater., 241 (1997) 930] qualitatively reproduces these trends, and indicates that the different response in the simulations is due to the ionization location of the injected nitrogen. Low electron temperatures in the private flux region (PFR) in L-mode

Authors:

Lore, J. D.; Reinke, M. L.; Brunner, D.; LaBombard, B.; Lipschultz, B.; Terry, J.; Pitts, R. A.; Feng, Y.

OSTI

Publication Date:: Mon Nov 26 23:00:00 EST 2018

DOE Contract Number:: FC02-99ER54512; AC05-00OR22725

Research Org.:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

OSTI Identifier:: 1880298

DOI:: https://doi.org/10.7910/DVN/ON9P44

Citation Formats


                    Lore, J. D., Reinke, M. L., Brunner, D., LaBombard, B., Lipschultz, B., Terry, J., Pitts, R. A., and Feng, Y. 3D simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENE.  United States: N. p., 2018. 
        Web.  doi:10.7910/DVN/ON9P44.

Copy to clipboard


                    Lore, J. D., Reinke, M. L., Brunner, D., LaBombard, B., Lipschultz, B., Terry, J., Pitts, R. A., & Feng, Y. 3D simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENE.  United States.  doi:https://doi.org/10.7910/DVN/ON9P44

Copy to clipboard


                    Lore, J. D., Reinke, M. L., Brunner, D., LaBombard, B., Lipschultz, B., Terry, J., Pitts, R. A., and Feng, Y. 2018.  
"3D simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENE".  United States.  doi:https://doi.org/10.7910/DVN/ON9P44.  https://www.osti.gov/servlets/purl/1880298. Pub date:Mon Nov 26 23:00:00 EST 2018

Copy to clipboard


                    
@article{osti_1880298,

  title        = {3D simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENE},

  author       = {Lore, J. D. and Reinke, M. L. and Brunner, D. and LaBombard, B. and Lipschultz, B. and Terry, J. and Pitts, R. A. and Feng, Y.},

  abstractNote = {Experiments in Alcator C-Mod to assess the level of toroidal asymmetry in divertor conditions resulting from poloidally and toroidally localized extrinsic impurity gas seeding show a weak toroidal peaking (~1.1) in divertor electron temperatures for high-power Enhanced D-alpha H-mode plasmas. This is in contrast to similar experiments in Ohmically heated L-mode plasmas, which showed a clear toroidal modulation in the divertor electron temperature. Modeling of these experiments using the 3D edge transport code EMC3-EIRENE [Y. Feng, et al., J. Nucl. Mater., 241 (1997) 930] qualitatively reproduces these trends, and indicates that the different response in the simulations is due to the ionization location of the injected nitrogen. Low electron temperatures in the private flux region (PFR) in L-mode},

  doi          = {10.7910/DVN/ON9P44},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon Nov 26 23:00:00 EST 2018},

  month        = {Mon Nov 26 23:00:00 EST 2018}

}

Copy to clipboard

Dataset:

View Dataset

DOI: https://doi.org/10.7910/DVN/ON9P44

Save / Share:

Export Metadata

Save to My Library

Similar records in DOE Data Explorer and OSTI.GOV collections:

Three-dimensional simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENE

Journal Article Reinke, M. L. ; Lipschultz, B. ; Brunner, D. ; ... - Physics of Plasmas

Experiments in Alcator C-Mod to assess the level of toroidal asymmetry in divertor conditions resulting from poloidally and toroidally localized extrinsic impurity gas seeding show a weak toroidal peaking (∼1.1) in divertor electron temperatures for high-power enhanced D-alpha H-mode plasmas. This is in contrast to similar experiments in Ohmically heated L-mode plasmas, which showed a clear toroidal modulation in the divertor electron temperature. Modeling of these experiments using the 3D edge transport code EMC3-EIRENE [Y. Feng et al., J. Nucl. Mater. 241, 930 (1997)] qualitatively reproduces these trends, and indicates that the different response in the simulations is due tomore »« less
Three-dimensional simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENE

Journal Article Lore, Jeremy D. ; Reinke, M. L. ; Brunner, D. ; ... - Physics of Plasmas

We study experiments in Alcator C-Mod to assess the level of toroidal asymmetry in divertor conditions resulting from poloidally and toroidally localized extrinsic impurity gas seeding show a weak toroidal peaking (~1.1) in divertor electron temperatures for high-power enhanced D-alpha H-modeplasmas. This is in contrast to similar experiments in Ohmically heated L-modeplasmas, which showed a clear toroidal modulation in the divertor electron temperature. Modeling of these experiments using the 3D edge transport code EMC3-EIRENE [Y. Feng et al., J. Nucl. Mater. 241, 930 (1997)] qualitatively reproduces these trends, and indicates that the different response in the simulations is due tomore »« less
Three-dimensional simulation of H-mode plasmas with localized divertor impurity injection on Alcator C-Mod using the edge transport code EMC3-EIRENEa)

Journal Article Lore, J. D. ; Reinke, M. L. ; Brunner, D. ; ... - Physics of Plasmas
Anomalous transport in the H-mode pedestal of Alcator C-Mod discharges

Dataset Pankin, A. Y. ; Hughes, J. W. ; Greenwald, M. J. ; ...

Anomalous transport in the H-mode pedestal region of five Alcator C-Mod discharges, representing a collisionality scan is analyzed. The understanding of anomalous transport in the pedestal region is important for the development of a comprehensive model for the H-mode pedestal slope. In this research, a possible role of the drift resistive inertial ballooning modes (Rafiq et al 2010 Phys. Plasmas 17 082511) in the edge of Alcator C-Mod discharges is analyzed. The stability analysis, carried out using the TRANSP code, indicates that the DRIBM modes are strongly unstable in Alcator C-Mod discharges with large electron collisionality. An improved interpretive analysismore »« less
EMC3-EIRENE modelling of toroidally-localized divertor gas injection experiments on Alcator C-Mod

Journal Article Lore, Jeremy D. ; Reinke, M. L. ; LaBombard, Brian ; ... - Journal of Nuclear Materials

Experiments on Alcator C-Mod with toroidally and poloidally localized divertor nitrogen injection have been modeled using the three-dimensional edge transport code EMC3-EIRENE to elucidate the mechanisms driving measured toroidal asymmetries. In these experiments five toroidally distributed gas injectors in the private flux region were sequentially activated in separate discharges resulting in clear evidence of toroidal asymmetries in radiated power and nitrogen line emission as well as a ~50% toroidal modulation in electron pressure at the divertor target. The pressure modulation is qualitatively reproduced by the modelling, with the simulation yielding a toroidal asymmetry in the heat flow to the outermore »« less

Similar Records