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Integrated Modeling of Boron Powder Injection for Real-time Plasma-facing Component Conditioning by Effenberg, Florian; Schmid, Klaus; Nespoli, Federico; Bortolon, Alessandro; Feng, Yühe; Grierson, Brian A.; Lore, Jeremy D.; Maingi, Rajesh; Rudakov, Dmitry L. is a scholarly article available to read on EtoBox.

What is Integrated Modeling of Boron Powder Injection for Real-time Plasma-facing Component Conditioning about?

An integrated modeling framework for investigating the application of solid boron powder injection for real-time surface conditioning of plasma-facing components in tokamak environments is presented. Utilizing the DIII-D impurity powder dropper setup, this study simulates B powder injection scenarios ranging from mg/s to tens of mg/s, corresponding to B flux rates of $10^{20}-10^{21}$ B/s in standard L-mode conditions. The comprehensive modeling approach combines EMC3-EIRENE for simulating the D plasma background and DIS for the ablation and transport of the B powder particles. The results show substantial transport of B to the inboard lower divertor, predominantly influenced by the main ion plasma flow. The dependency on powder particle size (5-250 $\mu$m) was found to be insignificant for the scenario considered. The effects of erosion and redeposition were considered to reconcile the discrepancies with experimental observations, which saw substantial deposition on the outer divertor PFCs. For this purpose, the WallDYN3D code was updated to include B sources within the plasma domain and integrated into the modeling framework. The mixed-material migration modeling shows evolving B

Author

Effenberg, Florian; Schmid, Klaus; Nespoli, Federico; Bortolon, Alessandro; Feng, Yühe; Grierson, Brian A.; Lore, Jeremy D.; Maingi, Rajesh; Rudakov, Dmitry L.

Published

2024

Language

EN