Dust and powder in fusion plasmas: Recent developments in theory, modeling, and experiments

S Ratynskaia, A Bortolon, SI Krasheninnikov - Reviews of Modern Plasma …, 2022 - Springer
In this paper, we present a brief historic overview of the research on dust in fusion devices
with carbon plasma-facing components and then highlight the most recent developments in …

[HTML][HTML] Physics and applications of dusty plasmas: The Perspectives 2023

J Beckers, J Berndt, D Block, M Bonitz… - Physics of …, 2023 - pubs.aip.org
Dusty plasmas are electrically quasi-neutral media that, along with electrons, ions, neutral
gas, radiation, and electric and/or magnetic fields, also contain solid or liquid particles with …

Observation of a reduced-turbulence regime with boron powder injection in a stellarator

F Nespoli, S Masuzaki, K Tanaka, N Ashikawa… - Nature Physics, 2022 - nature.com
In state-of-the-art stellarators, turbulence is a major cause of the degradation of plasma
confinement. To maximize confinement, which eventually determines the amount of nuclear …

[HTML][HTML] Characterization of injection and confinement improvement through impurity induced profile modifications on the Wendelstein 7-X stellarator

R Lunsford, C Killer, A Nagy, DA Gates, T Klinger… - Physics of …, 2021 - pubs.aip.org
Pulsed injections of boron carbide granules into Wendelstein 7-X stellarator (W7-X) plasmas
transiently increase the plasma stored energy and core ion temperatures above the …

First impurity powder injection experiments in LHD

F Nespoli, N Ashikawa, EP Gilson, R Lunsford… - Nuclear Materials and …, 2020 - Elsevier
Injection of impurities in the form of sub-millimeter powder grains is performed for the first
time in the Large Helical Device (LHD) plasma, employing the Impurity Powder Dropper …

Initial results from boron powder injection experiments in WEST lower single null L-mode plasmas

G Bodner, A Gallo, A Diallo, R Lunsford… - Nuclear …, 2022 - iopscience.iop.org
Using a recently installed impurity powder dropper (IPD), boron powder (< 150 μm) was
injected into lower single null (LSN) L-mode discharges in WEST. IPDs possibly enable real …

Real-time wall conditioning and recycling modification utilizing boron and boron nitride powder injections into the Large Helical Device

R Lunsford, S Masuzaki, F Nespoli, N Ashikawa… - Nuclear …, 2022 - iopscience.iop.org
Controlled particulate injections from the PPPL impurity powder dropper (IPD) into the Large
Helical Device have demonstrated positive effects on the wall conditions on both an intra …

Developing solid-surface plasma facing components for pilot plants and reactors with replenishable wall claddings and continuous surface conditioning. Part A …

PC Stangeby, EA Unterberg, JW Davis… - Plasma Physics and …, 2022 - iopscience.iop.org
It is estimated that pilot plants and reactors may experience rates of net erosion and
deposition of solid plasma facing component (PFC) material of 10 3–10 5 kg yr− 1. Even if …

Evaluation of silicon carbide as a divertor armor material in DIII-D H-mode discharges

T Abrams, S Bringuier, DM Thomas, G Sinclair… - Nuclear …, 2021 - iopscience.iop.org
Silicon carbide (SiC) represents a promising but largely untested plasma-facing material
(PFM) for next-step fusion devices. In this work, an analytic mixed-material erosion model is …

First-principles study of diffusion of intrinsic point defects in tungsten borides

L Yang, BD Wirth - Journal of Nuclear Materials, 2024 - Elsevier
The evolution of point defects is crucial in determining the radiation resistance of materials in
a fusion environment. A comprehensive investigation of diffusion mechanisms for intrinsic …