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

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.

doi:10.1063/1.5024405

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

Journal Article · Wed Apr 25 00:00:00 EDT 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5024405· OSTI ID:1540176

^[1]; ^[2]; Chan, V. S. ^[3]; ^[2]; Garofalo, A. M. ^[4]; ^[5]; Liu, L. ^[6]; ^[2]; Chen, J. L. ^[2]; ^[2]; Gong, X. Z. ^[2]; ^[2]; Qian, J. P. ^[2]

Chinese Academy of Sciences, Hefei (China). Inst. of Plasma Physics; Univ. of Science and Technology of China, Hefei (China); DOE/OSTI
Chinese Academy of Sciences, Hefei (China). Inst. of Plasma Physics
Univ. of Science and Technology of China, Hefei (China); General Atomics, San Diego, CA (United States)
General Atomics, San Diego, CA (United States)
Huazhong Univ. of Science and Technology, Wuhan (China). State Key Lab. of Advanced Electromagnetic Engineering and Technology
Univ. of Science and Technology of China, Hefei (China)

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 β_N, l_i, and β_P 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 I_P (>0.76 MA) while the VX model covers a wider range of plasma current (I_P > 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.

View Accepted Manuscript (DOE)

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NNSFC); USDOE; USDOE Office of Science (SC)

Contributing Organization:: CFETR Physics Team

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1540176

Alternate ID(s):: OSTI ID: 1434560

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 25; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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