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Title: Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges

Abstract

Here, time-dependent integrated modeling of DIII-D ITER-like and high bootstrap current plasma ramp-up discharges has been performed with the equilibrium code EFIT, and the transport codes TGYRO and ONETWO. Electron and ion temperature profiles are simulated by TGYRO with the TGLF (SAT0 or VX model) turbulent and NEO neoclassical transport models. The VX model is a new empirical extension of the TGLF turbulent model [Jian et al., Nucl. Fusion 58, 016011 (2018)], which captures the physics of multi-scale interaction between low-k and high-k turbulence from nonlinear gyro-kinetic simulation. This model is demonstrated to accurately model low Ip discharges from the EAST tokamak. Time evolution of the plasma current density profile is simulated by ONETWO with the experimental current ramp-up rate. The general trend of the predicted evolution of the current density profile is consistent with that obtained from the equilibrium reconstruction with Motional Stark effect constraints. The predicted evolution of βN, li, and βP also agrees well with the experiments. For the ITER-like cases, the predicted electron and ion temperature profiles using TGLF_Sat0 agree closely with the experimental measured profiles, and are demonstrably better than other proposed transport models. For the high bootstrap current case, the predicted electron and ionmore » temperature profiles perform better in the VX model. It is discovered that the SAT0 model works well at high IP (>0.76 MA) while the VX model covers a wider range of plasma current (IP > 0.6 MA). The results reported in this paper suggest that the developed integrated modeling could be a candidate for ITER and CFETR ramp-up engineering design modeling.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [2];  [4]; ORCiD logo [5];  [6]; ORCiD logo [2];  [2]; ORCiD logo [2];  [2]; ORCiD logo [2];  [2]
  1. Chinese Academy of Sciences, Hefei (China). Inst. of Plasma Physics; Univ. of Science and Technology of China, Hefei (China)
  2. Chinese Academy of Sciences, Hefei (China). Inst. of Plasma Physics
  3. Univ. of Science and Technology of China, Hefei (China); General Atomics, San Diego, CA (United States)
  4. General Atomics, San Diego, CA (United States)
  5. Huazhong Univ. of Science and Technology, Wuhan (China). State Key Lab. of Advanced Electromagnetic Engineering and Technology
  6. Univ. of Science and Technology of China, Hefei (China)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Natural Science Foundation of China (NNSFC)
Contributing Org.:
CFETR Physics Team
OSTI Identifier:
1540176
Alternate Identifier(s):
OSTI ID: 1434560
Grant/Contract Number:  
FC02-04ER54698
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 4; 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

Citation Formats

Wu, M. Q., Pan, C. K., Chan, V. S., Li, G. Q., Garofalo, A. M., Jian, X., Liu, L., Ren, Q. L., Chen, J. L., Gao, X., Gong, X. Z., Ding, S. Y., and Qian, J. P. Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges. United States: N. p., 2018. Web. doi:10.1063/1.5024405.
Wu, M. Q., Pan, C. K., Chan, V. S., Li, G. Q., Garofalo, A. M., Jian, X., Liu, L., Ren, Q. L., Chen, J. L., Gao, X., Gong, X. Z., Ding, S. Y., & Qian, J. P. Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges. United States. doi:10.1063/1.5024405.
Wu, M. Q., Pan, C. K., Chan, V. S., Li, G. Q., Garofalo, A. M., Jian, X., Liu, L., Ren, Q. L., Chen, J. L., Gao, X., Gong, X. Z., Ding, S. Y., and Qian, J. P. Wed . "Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges". United States. doi:10.1063/1.5024405. https://www.osti.gov/servlets/purl/1540176.
@article{osti_1540176,
title = {Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges},
author = {Wu, M. Q. and Pan, C. K. and Chan, V. S. and Li, G. Q. and Garofalo, A. M. and Jian, X. and Liu, L. and Ren, Q. L. and Chen, J. L. and Gao, X. and Gong, X. Z. and Ding, S. Y. and Qian, J. P.},
abstractNote = {Here, time-dependent integrated modeling of DIII-D ITER-like and high bootstrap current plasma ramp-up discharges has been performed with the equilibrium code EFIT, and the transport codes TGYRO and ONETWO. Electron and ion temperature profiles are simulated by TGYRO with the TGLF (SAT0 or VX model) turbulent and NEO neoclassical transport models. The VX model is a new empirical extension of the TGLF turbulent model [Jian et al., Nucl. Fusion 58, 016011 (2018)], which captures the physics of multi-scale interaction between low-k and high-k turbulence from nonlinear gyro-kinetic simulation. This model is demonstrated to accurately model low Ip discharges from the EAST tokamak. Time evolution of the plasma current density profile is simulated by ONETWO with the experimental current ramp-up rate. The general trend of the predicted evolution of the current density profile is consistent with that obtained from the equilibrium reconstruction with Motional Stark effect constraints. The predicted evolution of βN, li, and βP also agrees well with the experiments. For the ITER-like cases, the predicted electron and ion temperature profiles using TGLF_Sat0 agree closely with the experimental measured profiles, and are demonstrably better than other proposed transport models. For the high bootstrap current case, the predicted electron and ion temperature profiles perform better in the VX model. It is discovered that the SAT0 model works well at high IP (>0.76 MA) while the VX model covers a wider range of plasma current (IP > 0.6 MA). The results reported in this paper suggest that the developed integrated modeling could be a candidate for ITER and CFETR ramp-up engineering design modeling.},
doi = {10.1063/1.5024405},
journal = {Physics of Plasmas},
number = 4,
volume = 25,
place = {United States},
year = {2018},
month = {4}
}

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