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Particle tracing simulation of W transport under electromagnetic perturbation of Li pellet-induced ELMs in EAST.

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Τίτλος: Particle tracing simulation of W transport under electromagnetic perturbation of Li pellet-induced ELMs in EAST.
Συγγραφείς: Chang, Huayi1 (AUTHOR), Li, Mao1,2 (AUTHOR), Wang, Feng1 (AUTHOR), Sun, Jizhong1 (AUTHOR) jsun@dlut.edu.cn, Zhang, Yue1 (AUTHOR)
Πηγή: Nuclear Fusion. 2026, Vol. 66 Issue 9, p1-15. 15p.
Θεματικοί όροι: *Ion flow dynamics, *Particle dynamics analysis, *Magnetohydrodynamics, *Plasma interactions, *Tokamaks, *Plasma physics
Περίληψη: A particle-tracing approach is employed to investigate the transport dynamics of W ions affected by electromagnetic perturbation produced by a Li pellet induced ELM in EAST. The electromagnetic perturbations from ELMs obtained from BOUT++ three-field simulations, are interpolated onto the grid using by particle tracing code as input for full-orbit simulation of W ions. It is found that a distribution of W 20 + ions can be a good representative for the distribution of W ions with multiple but close charge states. The results reveal that the E × B drift is the primary driving force for W ions transport during the ELM and that the perturbed electric field is a dominant determining factor. Further study on the effects of pellet deposition location indicates that pellets deposited on the pedestal top are more effective in expelling W ions from the core plasma region and screening W ions from influx. Radial velocity analysis indicates that ELM perturbations tend to increase the average velocity magnitude and diffusion coefficients of W ions. It is also observed that W ions have higher radial velocity magnitude as they approach the separatrix, which facilitates their expulsion from the boundary region. Simulations of discharge scenarios with W ions distributing at different initial poloidal locations reveal that those initially deposited on the low-field side are the most prone to the loss of W ions. [ABSTRACT FROM AUTHOR]
Βάση Δεδομένων: Academic Search Index
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Particle tracing simulation of W transport under electromagnetic perturbation of Li pellet-induced ELMs in EAST.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Chang%2C+Huayi%22">Chang, Huayi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Mao%22">Li, Mao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Feng%22">Wang, Feng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Jizhong%22">Sun, Jizhong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jsun@dlut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yue%22">Zhang, Yue</searchLink><relatesTo>1</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Nuclear+Fusion%22">Nuclear Fusion</searchLink>. 2026, Vol. 66 Issue 9, p1-15. 15p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Ion+flow+dynamics%22">Ion flow dynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Particle+dynamics+analysis%22">Particle dynamics analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22Magnetohydrodynamics%22">Magnetohydrodynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Plasma+interactions%22">Plasma interactions</searchLink><br />*<searchLink fieldCode="DE" term="%22Tokamaks%22">Tokamaks</searchLink><br />*<searchLink fieldCode="DE" term="%22Plasma+physics%22">Plasma physics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A particle-tracing approach is employed to investigate the transport dynamics of W ions affected by electromagnetic perturbation produced by a Li pellet induced ELM in EAST. The electromagnetic perturbations from ELMs obtained from BOUT++ three-field simulations, are interpolated onto the grid using by particle tracing code as input for full-orbit simulation of W ions. It is found that a distribution of W 20 + ions can be a good representative for the distribution of W ions with multiple but close charge states. The results reveal that the E × B drift is the primary driving force for W ions transport during the ELM and that the perturbed electric field is a dominant determining factor. Further study on the effects of pellet deposition location indicates that pellets deposited on the pedestal top are more effective in expelling W ions from the core plasma region and screening W ions from influx. Radial velocity analysis indicates that ELM perturbations tend to increase the average velocity magnitude and diffusion coefficients of W ions. It is also observed that W ions have higher radial velocity magnitude as they approach the separatrix, which facilitates their expulsion from the boundary region. Simulations of discharge scenarios with W ions distributing at different initial poloidal locations reveal that those initially deposited on the low-field side are the most prone to the loss of W ions. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1088/1741-4326/ae88e1
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 1
    Subjects:
      – SubjectFull: Ion flow dynamics
        Type: general
      – SubjectFull: Particle dynamics analysis
        Type: general
      – SubjectFull: Magnetohydrodynamics
        Type: general
      – SubjectFull: Plasma interactions
        Type: general
      – SubjectFull: Tokamaks
        Type: general
      – SubjectFull: Plasma physics
        Type: general
    Titles:
      – TitleFull: Particle tracing simulation of W transport under electromagnetic perturbation of Li pellet-induced ELMs in EAST.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Chang, Huayi
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            NameFull: Li, Mao
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            NameFull: Wang, Feng
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            NameFull: Sun, Jizhong
      – PersonEntity:
          Name:
            NameFull: Zhang, Yue
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          Dates:
            – D: 01
              M: 09
              Text: 2026
              Type: published
              Y: 2026
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              Value: 00295515
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              Value: 66
            – Type: issue
              Value: 9
          Titles:
            – TitleFull: Nuclear Fusion
              Type: main
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