Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges
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- Chinese Academy of Sciences, Hefei (China). Inst. of Plasma Physics; Univ. of Science and Technology of China, Hefei (China)
- 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 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.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)
- Contributing Organization:
- CFETR Physics Team
- Grant/Contract Number:
- FC02-04ER54698
- OSTI ID:
- 1540176
- Alternate ID(s):
- OSTI ID: 1434560
- Journal Information:
- Physics of Plasmas, Vol. 25, Issue 4; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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