Academic Journal
Particle tracing simulation of W transport under electromagnetic perturbation of Li pellet-induced ELMs in EAST.
| Τίτλος: | Particle tracing simulation of W transport under electromagnetic perturbation of Li pellet-induced ELMs in EAST. |
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| 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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