Numerical modeling of impurity powder injection in W7-X

W7-X Team

doi:10.1016/j.nme.2024.101837

Numerical modeling of impurity powder injection in W7-X

W7-X Team

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

In this work, we present numerical simulation results of powder injection in W7-X using the EMC3-EIRENE and DIS codes. First, we model powder injection experiments performed in W7-X with the Probe Mounted Powder Injector. The simulation results qualitatively agree with visible imaging measurements. Secondly, we perform predictive simulations to guide the installation of an Impurity Powder Dropper in W7-X, allowing to choose in between several available non-vertical ports to maximize the amount of powder penetrating into the plasma, as well as the verticality of the port, to minimize sticking of the powders in the in-vessel stainless steel guiding tube. Port AEM41 is selected as the best candidate for IPD installation. The robustness of the simulation results has been verified for different plasma densities, powder materials and sizes, powder friction coefficient and changes in the plasma flow.

Original language	English (US)
Article number	101837
Journal	Nuclear Materials and Energy
Volume	42
DOIs	https://doi.org/10.1016/j.nme.2024.101837
State	Published - Mar 2025

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Materials Science (miscellaneous)
Nuclear Energy and Engineering

Keywords

Powder injection experiments
Simulations
Stellarator

Access to Document

10.1016/j.nme.2024.101837

Cite this

@article{dde389d309e04f898f67dd7420858c55,

title = "Numerical modeling of impurity powder injection in W7-X",

abstract = "In this work, we present numerical simulation results of powder injection in W7-X using the EMC3-EIRENE and DIS codes. First, we model powder injection experiments performed in W7-X with the Probe Mounted Powder Injector. The simulation results qualitatively agree with visible imaging measurements. Secondly, we perform predictive simulations to guide the installation of an Impurity Powder Dropper in W7-X, allowing to choose in between several available non-vertical ports to maximize the amount of powder penetrating into the plasma, as well as the verticality of the port, to minimize sticking of the powders in the in-vessel stainless steel guiding tube. Port AEM41 is selected as the best candidate for IPD installation. The robustness of the simulation results has been verified for different plasma densities, powder materials and sizes, powder friction coefficient and changes in the plasma flow.",

keywords = "Powder injection experiments, Simulations, Stellarator",

author = "\{W7-X Team\} and F. Nespoli and Y. Feng and G. Kawamura and M. Shoji and R. Lunsford and D. Hathiramani and J. Koopmann and A. Nagy and F. Effenberg and Pablant, \{N. A.\} and C. Killer and D. Zhang and M. Kubkowska and S. Jablonski and G. Kocsis and B. Buttensch{\"o}n and D. Nicolai",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2025",

month = mar,

doi = "10.1016/j.nme.2024.101837",

language = "English (US)",

volume = "42",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Numerical modeling of impurity powder injection in W7-X

AU - W7-X Team

AU - Nespoli, F.

AU - Feng, Y.

AU - Kawamura, G.

AU - Shoji, M.

AU - Lunsford, R.

AU - Hathiramani, D.

AU - Koopmann, J.

AU - Nagy, A.

AU - Effenberg, F.

AU - Pablant, N. A.

AU - Killer, C.

AU - Zhang, D.

AU - Kubkowska, M.

AU - Jablonski, S.

AU - Kocsis, G.

AU - Buttenschön, B.

AU - Nicolai, D.

PY - 2025/3

Y1 - 2025/3

N2 - In this work, we present numerical simulation results of powder injection in W7-X using the EMC3-EIRENE and DIS codes. First, we model powder injection experiments performed in W7-X with the Probe Mounted Powder Injector. The simulation results qualitatively agree with visible imaging measurements. Secondly, we perform predictive simulations to guide the installation of an Impurity Powder Dropper in W7-X, allowing to choose in between several available non-vertical ports to maximize the amount of powder penetrating into the plasma, as well as the verticality of the port, to minimize sticking of the powders in the in-vessel stainless steel guiding tube. Port AEM41 is selected as the best candidate for IPD installation. The robustness of the simulation results has been verified for different plasma densities, powder materials and sizes, powder friction coefficient and changes in the plasma flow.

AB - In this work, we present numerical simulation results of powder injection in W7-X using the EMC3-EIRENE and DIS codes. First, we model powder injection experiments performed in W7-X with the Probe Mounted Powder Injector. The simulation results qualitatively agree with visible imaging measurements. Secondly, we perform predictive simulations to guide the installation of an Impurity Powder Dropper in W7-X, allowing to choose in between several available non-vertical ports to maximize the amount of powder penetrating into the plasma, as well as the verticality of the port, to minimize sticking of the powders in the in-vessel stainless steel guiding tube. Port AEM41 is selected as the best candidate for IPD installation. The robustness of the simulation results has been verified for different plasma densities, powder materials and sizes, powder friction coefficient and changes in the plasma flow.

KW - Powder injection experiments

KW - Simulations

KW - Stellarator

UR - https://www.scopus.com/pages/publications/85212131384

UR - https://www.scopus.com/pages/publications/85212131384#tab=citedBy

U2 - 10.1016/j.nme.2024.101837

DO - 10.1016/j.nme.2024.101837

M3 - Article

AN - SCOPUS:85212131384

SN - 2352-1791

VL - 42

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

M1 - 101837

ER -

Numerical modeling of impurity powder injection in W7-X

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this