Comparisons between tokamak fueling of gas puffing and supersonic molecular beam injection in 2D simulations

Zhou, Y. L.; Wang, Z. H.; Xu, X. Q.; Li, H. D.; Feng, H.; Sun, W. G.

doi:10.1063/1.4905641

Title: Comparisons between tokamak fueling of gas puffing and supersonic molecular beam injection in 2D simulations

Journal Article · Fri Jan 09 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4905641· OSTI ID:1321425

^[1]; Wang, Z. H. ^[2];

^[3]; Li, H. D. ^[4]; Feng, H. ^[4]; Sun, W. G. ^[5]

Sichuan Univ., Chengdu (China). Inst. of Atomic and Molecular Physics; Southwestern Inst. of Physics, Chengdu (China)
Southwestern Inst. of Physics, Chengdu (China)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Xihua Univ., Chengdu (China)
Sichuan Univ., Chengdu (China). Inst. of Atomic and Molecular Physics; Xihua Univ., Chengdu (China)

Plasma fueling with high efficiency and deep injection is very important to enable fusion power performance requirements. It is a powerful and efficient way to study neutral transport dynamics and find methods of improving the fueling performance by doing large scale simulations. Furthermore, two basic fueling methods, gas puffing (GP) and supersonic molecular beam injection (SMBI), are simulated and compared in realistic divertor geometry of the HL-2A tokamak with a newly developed module, named trans-neut, within the framework of BOUT++ boundary plasma turbulence code [Z. H. Wang et al., Nucl. Fusion 54, 043019 (2014)]. The physical model includes plasma density, heat and momentum transport equations along with neutral density, and momentum transport equations. In transport dynamics and profile evolutions of both plasma and neutrals are simulated and compared between GP and SMBI in both poloidal and radial directions, which are quite different from one and the other. It finds that the neutrals can penetrate about four centimeters inside the last closed (magnetic) flux surface during SMBI, while they are all deposited outside of the LCF during GP. Moreover, it is the radial convection and larger inflowing flux which lead to the deeper penetration depth of SMBI and higher fueling efficiency compared to GP.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1321425

Report Number(s):: LLNL-JRNL-701340; PHPAEN

Journal Information:: Physics of Plasmas, Vol. 22, Issue 1; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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Summary of the fundamental plasma physics session in the first AAPPS-DPP conference Xu, M.; Hao, G. Z.; Diamond, P. H. Reviews of Modern Plasma Physics, Vol. 3, Issue 1 https://doi.org/10.1007/s41614-019-0028-y	journal	May 2019
The interaction between the supersonic molecular beam and electron beam for the optimization of an electron ionization ion source Liu, D.; Qu, G. F.; Wang, Y. Z. Review of Scientific Instruments, Vol. 90, Issue 10 https://doi.org/10.1063/1.5109448	journal	October 2019
Density compensation and stored energy recovery in resonant magnetic perturbation suppressed edge-localized mode H-mode plasmas using pellet fueling on EAST Hou, Jilei; Hu, Jiansheng; Chen, Yue Nuclear Fusion, Vol. 59, Issue 9 https://doi.org/10.1088/1741-4326/ab2bd3	journal	August 2019

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