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Title: Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++

Abstract

Transport dynamic 2D simulations for supersonic molecular beam injection (SMBI) fueling into H-mode deuterium plasmas on the Experimental Advanced Superconducting Tokamak (EAST) is first simulated using a seven-field two-fluid model in the BOUT++ framework. The SMB is assumed to be injected into plasma from the midplane at the low field side with a fixed width and constant molecular flux. The different densities and injection velocities of SMBI are investigated within the upper single-null geometry of EAST. The simulations indicate that the SMBI has a self-shielding effect on molecules' inward transport into the plasma, and the deposition of SMBI leads to a large increase in plasma density and decrease in plasma temperature. There is a velocity threshold for SMB penetrating the pedestal and depositing at the top of density pedestal. However, the deposition point would be back toward the plasma boundary after SMB arriving at the deepest penetration position. Comparing the different molecular injection velocities and densities, the outcomes demonstrate that the depth of deposition is closely related to the injection velocity rather than the molecular density. The simulated results show good agreement with the EAST experiments by comparing the electron density profiles obtained by simulation and experiment, respectively. These resultsmore » will be helpful for guiding future experiments, as well as the design of the SMBI system.« less

Authors:
 [1]; ORCiD logo [2];  [2];  [3];  [2];  [2];  [2];  [2];  [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [2];  [2];  [2]; ORCiD logo [2]; ORCiD logo [4]
  1. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics; Univ. of Science and Technology of China, Hefei (China)
  2. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
  3. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics; Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics, and Key Lab. of Photovoltaic and Energy Conservation Materials
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
2017YFE0301100; 2017YFA0402500; 2017YFE0301101; 2017479; 11625524; 11605246; 11775261; 11605237; 11775266; 11605236; 11675217
OSTI Identifier:
1619200
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 27; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Plasma transport properties; Plasma turbulence; Plasma properties and parameters; Plasma confinement; Tokamaks; Plasma discharges; Particle beams; Plasma temperature

Citation Formats

Qian, Y. Z., Xia, T. Y., Huang, Y. Q., Sun, Z., Zuo, G. Z., Xu, W., Meng, X. C., Huang, M., Li, C. L., Cao, B., Wang, Y. M., Zhang, T., Ye, K. X., Wang, Y. F., Zang, Q., Li, Y. Y., and Hu, J. S. Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++. United States: N. p., 2020. Web. doi:10.1063/1.5119043.
Qian, Y. Z., Xia, T. Y., Huang, Y. Q., Sun, Z., Zuo, G. Z., Xu, W., Meng, X. C., Huang, M., Li, C. L., Cao, B., Wang, Y. M., Zhang, T., Ye, K. X., Wang, Y. F., Zang, Q., Li, Y. Y., & Hu, J. S. Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++. United States. doi:https://doi.org/10.1063/1.5119043
Qian, Y. Z., Xia, T. Y., Huang, Y. Q., Sun, Z., Zuo, G. Z., Xu, W., Meng, X. C., Huang, M., Li, C. L., Cao, B., Wang, Y. M., Zhang, T., Ye, K. X., Wang, Y. F., Zang, Q., Li, Y. Y., and Hu, J. S. Thu . "Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++". United States. doi:https://doi.org/10.1063/1.5119043. https://www.osti.gov/servlets/purl/1619200.
@article{osti_1619200,
title = {Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++},
author = {Qian, Y. Z. and Xia, T. Y. and Huang, Y. Q. and Sun, Z. and Zuo, G. Z. and Xu, W. and Meng, X. C. and Huang, M. and Li, C. L. and Cao, B. and Wang, Y. M. and Zhang, T. and Ye, K. X. and Wang, Y. F. and Zang, Q. and Li, Y. Y. and Hu, J. S.},
abstractNote = {Transport dynamic 2D simulations for supersonic molecular beam injection (SMBI) fueling into H-mode deuterium plasmas on the Experimental Advanced Superconducting Tokamak (EAST) is first simulated using a seven-field two-fluid model in the BOUT++ framework. The SMB is assumed to be injected into plasma from the midplane at the low field side with a fixed width and constant molecular flux. The different densities and injection velocities of SMBI are investigated within the upper single-null geometry of EAST. The simulations indicate that the SMBI has a self-shielding effect on molecules' inward transport into the plasma, and the deposition of SMBI leads to a large increase in plasma density and decrease in plasma temperature. There is a velocity threshold for SMB penetrating the pedestal and depositing at the top of density pedestal. However, the deposition point would be back toward the plasma boundary after SMB arriving at the deepest penetration position. Comparing the different molecular injection velocities and densities, the outcomes demonstrate that the depth of deposition is closely related to the injection velocity rather than the molecular density. The simulated results show good agreement with the EAST experiments by comparing the electron density profiles obtained by simulation and experiment, respectively. These results will be helpful for guiding future experiments, as well as the design of the SMBI system.},
doi = {10.1063/1.5119043},
journal = {Physics of Plasmas},
number = 1,
volume = 27,
place = {United States},
year = {2020},
month = {1}
}

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