Helium, hydrogen, and fuzz in plasma-facing materials
KD Hammond - Materials Research Express, 2017 - iopscience.iop.org
Tungsten, the primary material under consideration as the divertor material in magnetic-
confinement nuclear fusion reactors, has been known for the last decade to form'fuzz'—a …
confinement nuclear fusion reactors, has been known for the last decade to form'fuzz'—a …
A review of late-stage tungsten fuzz growth
JAR Wright - Tungsten, 2022 - Springer
Tungsten will be used as the plasma-facing divertor material in the International
Thermonuclear Experimental Reactor (ITER) fusion reactor. Under high temperatures and …
Thermonuclear Experimental Reactor (ITER) fusion reactor. Under high temperatures and …
Molecular dynamics and Monte Carlo hybrid simulation for fuzzy tungsten nanostructure formation
AM Ito, A Takayama, Y Oda, T Tamura… - Nuclear …, 2015 - iopscience.iop.org
For the purposes of long-term use of tungsten divertor walls, the formation process of the
fuzzy tungsten nanostructure induced by exposure to the helium plasma was studied. In the …
fuzzy tungsten nanostructure induced by exposure to the helium plasma was studied. In the …
First-principles study of vacancy, interstitial, noble gas atom interstitial and vacancy clusters in bcc-W
Based on first-principles calculations, the vacancy and self-interstitial formation energy in
bcc-W are 3.19 eV and 9.97 eV. Binding energy between the dumbbell interstitials can be up …
bcc-W are 3.19 eV and 9.97 eV. Binding energy between the dumbbell interstitials can be up …
Hybrid simulation research on formation mechanism of tungsten nanostructure induced by helium plasma irradiation
AM Ito, A Takayama, Y Oda, T Tamura… - Journal of Nuclear …, 2015 - Elsevier
The generation of tungsten fuzzy nanostructure by exposure to helium plasma is one of the
important problems for the use of tungsten material as divertor plates in nuclear fusion …
important problems for the use of tungsten material as divertor plates in nuclear fusion …
Growth of nano-tendril bundles on tungsten with impurity-rich He plasmas
Isolated regions of nano-tendril bundles (NTBs) have been grown on tungsten surfaces
exposed to low-pressure direct-current helium plasma discharges operating with the …
exposed to low-pressure direct-current helium plasma discharges operating with the …
Influence of plasma impurities on the fuel retention in tungsten
A Kreter, D Nishijima, RP Doerner, M Freisinger… - Nuclear …, 2019 - iopscience.iop.org
The retention of radioactive tritium in the reactor wall is a safety issue and should be kept to
a minimum. We investigated the influence of helium, argon, neon and nitrogen as plasma …
a minimum. We investigated the influence of helium, argon, neon and nitrogen as plasma …
Surface modifications induced by high fluxes of low energy helium ions
Several metal surfaces, such as titanium, aluminum and copper, were exposed to highfluxes
(in the range of 1023m− 2s− 1) of low energy (< 100 eV) Helium (He) ions. The surfaces …
(in the range of 1023m− 2s− 1) of low energy (< 100 eV) Helium (He) ions. The surfaces …
Towards understanding the strong trapping effects of noble gas elements on hydrogen in tungsten
We have investigated the effects of noble gas elements (helium, neon, argon and krypton)
on the dissolution and accumulation behavior of hydrogen (H) in tungsten (W) using a first …
on the dissolution and accumulation behavior of hydrogen (H) in tungsten (W) using a first …
First-principles investigation of possible clustering of noble gas atoms implanted in bcc tungsten
T Tamura, R Kobayashi, S Ogata… - Modelling and Simulation …, 2013 - iopscience.iop.org
Using first-principles calculations, we have determined key properties of Ar and Ne in bcc W
that relate to the possible bubble formation of implanted Ar and Ne atoms. The most stable …
that relate to the possible bubble formation of implanted Ar and Ne atoms. The most stable …