Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++

Qian, Y. Z.; Xia, T. Y.; Huang, Y. Q.; Sun, Z.; Zuo, G. Z.; Xu, W.; Meng, X. C.; Huang, M.; Li, C. L.; Cao, B.; Wang, Y. M.; Zhang, T.; Ye, K. X.; Wang, Y. F.; Zang, Q.; Li, Y. Y.; Hu, J. S.

doi:10.1063/1.5119043

Title: Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++

Abstract

Transport dynamic 2D simulations for supersonic molecular beam injection (SMBI) fueling into H-mode deuterium plasmas on the Experimental Advanced Superconducting Tokamak (EAST) is first simulated using a seven-field two-fluid model in the BOUT++ framework. The SMB is assumed to be injected into plasma from the midplane at the low field side with a fixed width and constant molecular flux. The different densities and injection velocities of SMBI are investigated within the upper single-null geometry of EAST. The simulations indicate that the SMBI has a self-shielding effect on molecules' inward transport into the plasma, and the deposition of SMBI leads to a large increase in plasma density and decrease in plasma temperature. There is a velocity threshold for SMB penetrating the pedestal and depositing at the top of density pedestal. However, the deposition point would be back toward the plasma boundary after SMB arriving at the deepest penetration position. Comparing the different molecular injection velocities and densities, the outcomes demonstrate that the depth of deposition is closely related to the injection velocity rather than the molecular density. The simulated results show good agreement with the EAST experiments by comparing the electron density profiles obtained by simulation and experiment, respectively. These resultsmore »« less

Authors:

Qian, Y. Z. ^[1];

^[2]; Huang, Y. Q. ^[2]; Sun, Z. ^[3]; Zuo, G. Z. ^[2]; Xu, W. ^[2]; Meng, X. C. ^[2]; Huang, M. ^[2]; Li, C. L. ^[2];

^[2];

^[2]; Ye, K. X. ^[2]; Wang, Y. F. ^[2]; Zang, Q. ^[2];

^[2];

^[4]

Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics; Univ. of Science and Technology of China, Hefei (China)
Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics; Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics, and Key Lab. of Photovoltaic and Energy Conservation Materials

Publication Date:: Thu Jan 02 00:00:00 EST 2020

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: USDOE

Contributing Org.:: 2017YFE0301100; 2017YFA0402500; 2017YFE0301101; 2017479; 11625524; 11605246; 11775261; 11605237; 11775266; 11605236; 11675217

OSTI Identifier:: 1619200

Grant/Contract Number:: AC02-09CH11466

Resource Type:: Accepted Manuscript

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 27; Journal Issue: 1; Journal ID: ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Plasma transport properties; Plasma turbulence; Plasma properties and parameters; Plasma confinement; Tokamaks; Plasma discharges; Particle beams; Plasma temperature

Citation Formats


                    Qian, Y. Z., Xia, T. Y., Huang, Y. Q., Sun, Z., Zuo, G. Z., Xu, W., Meng, X. C., Huang, M., Li, C. L., Cao, B., Wang, Y. M., Zhang, T., Ye, K. X., Wang, Y. F., Zang, Q., Li, Y. Y., and Hu, J. S. Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++.  United States: N. p., 2020. 
Web.  doi:10.1063/1.5119043.

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                    Qian, Y. Z., Xia, T. Y., Huang, Y. Q., Sun, Z., Zuo, G. Z., Xu, W., Meng, X. C., Huang, M., Li, C. L., Cao, B., Wang, Y. M., Zhang, T., Ye, K. X., Wang, Y. F., Zang, Q., Li, Y. Y., & Hu, J. S. Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++.  United States.  https://doi.org/10.1063/1.5119043

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                    Qian, Y. Z., Xia, T. Y., Huang, Y. Q., Sun, Z., Zuo, G. Z., Xu, W., Meng, X. C., Huang, M., Li, C. L., Cao, B., Wang, Y. M., Zhang, T., Ye, K. X., Wang, Y. F., Zang, Q., Li, Y. Y., and Hu, J. S. Thu .  
"Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++".  United States.  https://doi.org/10.1063/1.5119043.  https://www.osti.gov/servlets/purl/1619200.

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@article{osti_1619200,

  title        = {Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++},

  author       = {Qian, Y. Z. and Xia, T. Y. and Huang, Y. Q. and Sun, Z. and Zuo, G. Z. and Xu, W. and Meng, X. C. and Huang, M. and Li, C. L. and Cao, B. and Wang, Y. M. and Zhang, T. and Ye, K. X. and Wang, Y. F. and Zang, Q. and Li, Y. Y. and Hu, J. S.},

  abstractNote = {Transport dynamic 2D simulations for supersonic molecular beam injection (SMBI) fueling into H-mode deuterium plasmas on the Experimental Advanced Superconducting Tokamak (EAST) is first simulated using a seven-field two-fluid model in the BOUT++ framework. The SMB is assumed to be injected into plasma from the midplane at the low field side with a fixed width and constant molecular flux. The different densities and injection velocities of SMBI are investigated within the upper single-null geometry of EAST. The simulations indicate that the SMBI has a self-shielding effect on molecules' inward transport into the plasma, and the deposition of SMBI leads to a large increase in plasma density and decrease in plasma temperature. There is a velocity threshold for SMB penetrating the pedestal and depositing at the top of density pedestal. However, the deposition point would be back toward the plasma boundary after SMB arriving at the deepest penetration position. Comparing the different molecular injection velocities and densities, the outcomes demonstrate that the depth of deposition is closely related to the injection velocity rather than the molecular density. The simulated results show good agreement with the EAST experiments by comparing the electron density profiles obtained by simulation and experiment, respectively. These results will be helpful for guiding future experiments, as well as the design of the SMBI system.},

  doi          = {10.1063/1.5119043},

  journal      = {Physics of Plasmas},

  number       = 1,

  volume       = 27,

  place        = {United States},

  year         = {Thu Jan 02 00:00:00 EST 2020},

  month        = {Thu Jan 02 00:00:00 EST 2020}

}

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Title: Simulation of supersonic molecular beam injection fueling into H-mode plasmas on EAST using BOUT++

Abstract

Citation Formats

Review: Pellet injection experiments and modelling journal, July 2007

Comparison between supersonic molecular-beam injection and conventional gas-puffing for plasma performance in HeliotronJ journal, August 2011

Impact of a pulsed supersonic deuterium gas jet on the ELM behaviour in ASDEX Upgrade journal, August 2005

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Comparison between gas puffing and supersonic molecular beam injection in plasma density feedback experiments in EAST journal, October 2013

BOUT++: A framework for parallel plasma fluid simulations journal, September 2009

Analysis of fuelling requirements in ITER H-modes with SOLPS-EPED1 derived scalings journal, September 2016

ELM mitigation by means of supersonic molecular beam and pellet injection on the EAST superconducting tokamak journal, August 2015

Development of the W-band density profile and fluctuation reflectometer on EAST journal, November 2013

Plasma behaviour with molecular beam injection in the HL-1M tokamak journal, April 1998

Plasma behaviour with hydrogen supersonic molecular beam and cluster jet injection in the HL-2A tokamak journal, October 2007

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Fuelling characteristics of supersonic molecular beam injection in JT-60U journal, September 2010

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Impact of a pulsed supersonic deuterium gas jet on the ELM behaviour in ASDEX Upgrade
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BOUT++: A framework for parallel plasma fluid simulations
journal, September 2009

Analysis of fuelling requirements in ITER H-modes with SOLPS-EPED1 derived scalings
journal, September 2016

ELM mitigation by means of supersonic molecular beam and pellet injection on the EAST superconducting tokamak
journal, August 2015

Development of the W-band density profile and fluctuation reflectometer on EAST
journal, November 2013

Plasma behaviour with molecular beam injection in the HL-1M tokamak
journal, April 1998

Plasma behaviour with hydrogen supersonic molecular beam and cluster jet injection in the HL-2A tokamak
journal, October 2007

Divertor heat flux simulations in ELMy H-mode discharges of EAST
journal, August 2017

Overview of the present progress and activities on the CFETR
journal, June 2017

Experiments on Gas Jet in the Wendelstein 7-AS Stellarator
journal, October 2003

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Fuelling characteristics of supersonic molecular beam injection in JT-60U
journal, September 2010

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journal, October 2004