Enhanced growth of large-scale nanostructures with metallic ion precipitation in helium plasmas

S Kajita, S Kawaguchi, N Ohno, N Yoshida - Scientific reports, 2018 - nature.com
Helium plasma irradiation on metal surfaces leads to the formation of metallic fuzzy
nanostructures accompanied by the growth of helium bubbles in metals. The mechanism of …

Fuzzy nanostructure growth on precious metals by He plasma irradiation

S Kajita, T Nojima, Y Tomita, N Ohno, H Tanaka… - Surface and Coatings …, 2018 - Elsevier
Growth of helium bubbles near the surface of metals leads to various morphology changes
when sufficient helium ions are continuously implanted on the surface. In this study, low …

[HTML][HTML] Tungsten fuzz: Deposition effects and influence to fusion devices

S Kajita, N Yoshida, N Ohno - Nuclear Materials and Energy, 2020 - Elsevier
Helium (He) plasma irradiation to tungsten leads to formation of He bubbles and fiberform
nanostructures called fuzz on the surface. Although the fuzz growth condition and growth …

Morphologies of co-depositing W layer formed during He plasma irradiation

S Kajita, S Kawaguchi, N Yoshida, N Ohno… - Nuclear …, 2018 - iopscience.iop.org
Tungsten (W) samples were exposed to helium (He) plasmas with precipitation of W
particles. It was shown that visible large-scale fiberform nanostructures (LFNs) were formed …

[HTML][HTML] Effect of rhenium addition on tungsten fuzz formation in helium plasmas

A Khan, G De Temmerman, TW Morgan… - Journal of Nuclear …, 2016 - Elsevier
The effect of the addition of rhenium to tungsten on the formation of a nanostructure referred
to as 'fuzz'when exposed to helium plasmas at fusion relevant ion fluxes was investigated in …

Experimental mechanistic investigation of the nanostructuring of tungsten with low energy helium plasmas

P Fiflis, N Connolly, DN Ruzic - Journal of Nuclear Materials, 2016 - Elsevier
Helium ion bombardment of tungsten at temperatures between approximately one third and
one half of its melting point has shown growth of nanostructures colloquially referred to as …

The evolution of He nanobubbles in tungsten under fusion-relevant He ion irradiation conditions

Z Bi, D Liu, Y Zhang, L Liu, Y Xia, Y Hong, H Fan… - Nuclear …, 2019 - iopscience.iop.org
He-induced W nanofuzz growth over the W divertor target is one of the main limiting factors
affecting the current design and development of fusion reactors. In this paper, based on He …

TEM observation of the growth process of helium nanobubbles on tungsten: Nanostructure formation mechanism

S Kajita, N Yoshida, R Yoshihara, N Ohno… - Journal of nuclear …, 2011 - Elsevier
In future fusion devices, helium irradiation to tungsten could lead to the formation of tungsten
nanostructure, which has both pros and cons as a plasma facing component. Although the …

Growth of fiberform nanostructures on metal surfaces by helium plasma irradiation

S Kajita, AM Ito, K Ibano - Journal of Applied Physics, 2022 - pubs.aip.org
Helium plasma irradiation to various metals leads to peculiar morphology changes as
forming fiberform nanostructures called fuzz when a certain set of conditions is satisfied. In …

Direct time-resolved observation of tungsten nanostructured growth due to helium plasma exposure

P Fiflis, D Curreli, DN Ruzic - Nuclear Fusion, 2015 - iopscience.iop.org
Determination of the mechanisms underlying the growth of tungsten fuzz is an important step
towards mitigation of fuzz formation. Nanostructured tungsten was produced on resistively …