Reply to Comment on ‘Deuterium supersaturated surface layer in tungsten: ion energy dependence’

Nishijima, D.; Tokitani, M.; Nagata, D.; Schwarz-Selinger, T.; Založnik, A.; Chang, F.; Doerner, R. P.; Patino, M. I.; Simmonds, M. J.; Baldwin, M. J.; Tynan, G. R.

doi:10.1088/1741-4326/ad42b1

Title: Reply to Comment on ‘Deuterium supersaturated surface layer in tungsten: ion energy dependence’

Journal Article · 06 May 2024 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/ad42b1 · OSTI ID:2346240

;

; Nagata, D.;

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; Doerner, R. P.; Patino, M. I.;

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; Tynan, G. R.

Abstract We reply to the comment by Li et al (submitted to Nucl. Fusion with this response) on our recent paper Nishijima et al (2023 Nucl. Fusion 63 126003). In this response, we address the existence of an incident ion energy, E _i , threshold for the deuterium (D) supersaturated surface layer (DSSL) formation with a newly conducted D plasma exposure experiment at E _i ∼ 20 eV. It is also further demonstrated, based on new experiments where the ion flux, fluence, and sample temperature are scanned, that non-kinetic (ballistic) processes play a role in the DSSL formation and growth. In addition, the effect of impurities in our plasma is discussed also with a new analysis of the surface composition made after a D plasma exposure.

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Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: SC0022528

OSTI ID:: 2346240

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 6 Vol. 64; ISSN 0029-5515

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: IAEA

Language:: English

References (8)

Deuterium supersaturation in low-energy plasma-loaded tungsten surfaces Gao, L.; Jacob, W.; von Toussaint, U. Nuclear Fusion, Vol. 57, Issue 1 https://doi.org/10.1088/0029-5515/57/1/016026	journal	November 2016
Microscopic damage of tungsten exposed to deuterium–helium mixture plasma in PISCES and its impacts on retention property Miyamoto, M.; Nishijima, D.; Baldwin, M. J. Journal of Nuclear Materials, Vol. 415, Issue 1 https://doi.org/10.1016/j.jnucmat.2011.01.008	journal	August 2011
Hydrogen induced vacancy formation in tungsten Middleburgh, S. C.; Voskoboinikov, R. E.; Guenette, M. C. Journal of Nuclear Materials, Vol. 448, Issue 1-3 https://doi.org/10.1016/j.jnucmat.2014.02.014	journal	May 2014
An interbubble fracture mechanism of blister formation on helium-irradiated metals Evans, J. H. Journal of Nuclear Materials, Vol. 68, Issue 2 https://doi.org/10.1016/0022-3115(77)90232-X	journal	October 1977
Atomistic simulation for strain effects on threshold displacement energies in refractory metals Banisalman, Mosab Jaser; Oda, Takuji Computational Materials Science, Vol. 158 https://doi.org/10.1016/j.commatsci.2018.11.044	journal	February 2019
Tridyn-binary collision simulation of atomic collisions and dynamic composition changes in solids Möller, W.; Eckstein, W.; Biersack, J. P. Computer Physics Communications, Vol. 51, Issue 3 https://doi.org/10.1016/0010-4655(88)90148-8	journal	November 1988
ASTM E521-23, Standard Practice for Investigating the Effects of Neutron Radiation Damage Using Charged-Particle Irradiation https://doi.org/10.1520/E0521-23	standard	July 2023
Deuterium supersaturated surface layer in tungsten: ion energy dependence Nishijima, D.; Tokitani, M.; Nagata, D. Nuclear Fusion, Vol. 63, Issue 12 https://doi.org/10.1088/1741-4326/acf509	journal	September 2023

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