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Recent Progress in Modeling of CFETR Plasma Profiles from Core to Edge

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Abstract

Simulation studies of core plasmas and edge plasmas are performed in ASIPP to accommodate plasma profiles from core to edge based on physics modeling for the CFETR physics design. The coupling between the modeling for core plasmas and edge plasmas are described. The recent progress of the integrated core-pedestal simulations for core plasmas and the SOLPS simulations for plasmas in pedestal-SOL-divertor region are presented, respectively. In the optimization study for core plasma performance, moderate Z eff (~ 2.2) at pedestal top and a high ratio of density at separatrix to density at pedestal (n sep /n ped ~ 0.5) are found to be beneficial for the achievement of a high fusion gain in CFETR hybrid scenarios. The edge plasma simulations using the SOLPS code show that using either neon or argon impurity seeding can reduce the stationary power density on the divertor target to an acceptable level (< 10 MW/m2) but Z eff at pedestal top is still high (Z eff ~ 3). Future works to improve the consistence between the simulations of core and edge plasmas are discussed.

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Acknowledgement

This work is supported by the National Magnetic Confinement Fusion Program of China under Contracts No. 2017YFE0300500 and No. 2017YFE0300501. The authors acknowledge fruitful cooperation in the CFETR physics team and especially Prof. Vincent. S. Chan for his introduction of schemes to simulate a whole plasma in tokamaks. We appreciate the theory and computational sciences group in General Atomic for their valuable supports in the use of the GA code suites. Numerical computations were performed on the ShenMa High Performance Computing Cluster in Institute of Plasma Physics, Chinese Academy of Sciences.

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Authors and Affiliations

  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, People’s Republic of China

    Jiale Chen, Guozhang Jia & Nong Xiang

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  1. Jiale Chen
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  2. Guozhang Jia
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  3. Nong Xiang
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Correspondence to Guozhang Jia.

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Chen, J., Jia, G. & Xiang, N. Recent Progress in Modeling of CFETR Plasma Profiles from Core to Edge. J Fusion Energ 40, 1 (2021). https://doi.org/10.1007/s10894-021-00292-7

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