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Title: Numerical investigation on lithium transport in the edge plasma of EAST real-time- Li-injection experiments in the frame of BOUT++

Abstract

To study the transport of Li species in the plasma with real-time Li aerosol injection on EAST, a model has been developed by reducing Braginskii's equations, and implemented in the frame of BOUT++. The simulation results show that Li atoms propagate inwards since the Li injection, and their penetration depth depends on both the local plasma conditions along their path and initial injection velocity. It is also found that Li ions accumulate rapidly in the edge, and only a small fraction of Li species can transport cross the separatrix into the core. In the poloidal direction, Li ions drift swiftly downwards along the field lines, and transport much faster at the high field side than at the low field side. The interaction between background plasma and Li species plays a critical role in determining the edge plasma profile. It is found that real-time Li injection raises the plasma density in the pedestal region and reduces the plasma temperature, just as has been observed experimentally.

Authors:
 [1];  [1];  [2];  [3];  [4];  [4];  [4];  [1]
  1. Dalian Univ. of Technology, Dalian (China). School of Physics and Opto-Electronic Engineering
  2. Southwestern Inst. of Physics, Chengdu (China)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1568006
Report Number(s):
LLNL-JRNL-789247
Journal ID: ISSN 2352-1791; 987489; TRN: US2100003
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Materials and Energy
Additional Journal Information:
Journal Volume: 12; Journal Issue: C; Journal ID: ISSN 2352-1791
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOUT++; Lithium injection; Edge plasma

Citation Formats

Li, N. M., Sun, J. Z., Wang, Z. H., Xu, X. Q., Sun, Z., Wang, L., Hu, J. S., and Wang, D. Z. Numerical investigation on lithium transport in the edge plasma of EAST real-time- Li-injection experiments in the frame of BOUT++. United States: N. p., 2017. Web. doi:10.1016/j.nme.2016.12.009.
Li, N. M., Sun, J. Z., Wang, Z. H., Xu, X. Q., Sun, Z., Wang, L., Hu, J. S., & Wang, D. Z. Numerical investigation on lithium transport in the edge plasma of EAST real-time- Li-injection experiments in the frame of BOUT++. United States. https://doi.org/10.1016/j.nme.2016.12.009
Li, N. M., Sun, J. Z., Wang, Z. H., Xu, X. Q., Sun, Z., Wang, L., Hu, J. S., and Wang, D. Z. Tue . "Numerical investigation on lithium transport in the edge plasma of EAST real-time- Li-injection experiments in the frame of BOUT++". United States. https://doi.org/10.1016/j.nme.2016.12.009. https://www.osti.gov/servlets/purl/1568006.
@article{osti_1568006,
title = {Numerical investigation on lithium transport in the edge plasma of EAST real-time- Li-injection experiments in the frame of BOUT++},
author = {Li, N. M. and Sun, J. Z. and Wang, Z. H. and Xu, X. Q. and Sun, Z. and Wang, L. and Hu, J. S. and Wang, D. Z.},
abstractNote = {To study the transport of Li species in the plasma with real-time Li aerosol injection on EAST, a model has been developed by reducing Braginskii's equations, and implemented in the frame of BOUT++. The simulation results show that Li atoms propagate inwards since the Li injection, and their penetration depth depends on both the local plasma conditions along their path and initial injection velocity. It is also found that Li ions accumulate rapidly in the edge, and only a small fraction of Li species can transport cross the separatrix into the core. In the poloidal direction, Li ions drift swiftly downwards along the field lines, and transport much faster at the high field side than at the low field side. The interaction between background plasma and Li species plays a critical role in determining the edge plasma profile. It is found that real-time Li injection raises the plasma density in the pedestal region and reduces the plasma temperature, just as has been observed experimentally.},
doi = {10.1016/j.nme.2016.12.009},
journal = {Nuclear Materials and Energy},
number = C,
volume = 12,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 2017},
month = {Tue Aug 01 00:00:00 EDT 2017}
}

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Cited by: 3 works
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Figures / Tables:

Fig. 1 Fig. 1: Schematic of real-time Li aerosol injection. The black line represents the thin metal tube, through which the Li aerosol was injected into plasma.

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Works referenced in this record:

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journal, February 2012


New Steady-State Quiescent High-Confinement Plasma in an Experimental Advanced Superconducting Tokamak
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Dependence of recycling and edge profiles on lithium evaporation in high triangularity, high performance NSTX H-mode discharges
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2D simulations of transport dynamics during tokamak fuelling by supersonic molecular beam injection
journal, March 2014


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journal, September 2011


Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.