First temperature stage evolution of irradiation-induced defects in tungsten studied by positron annihilation spectroscopy

Debelle, A.; Barthe, M.F.; Sauvage, Thierry

doi:10.1016/j.jnucmat.2008.03.002

Cited by 128 publications

(77 citation statements)

References 17 publications

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“…Exposure conditions for each exposure of each sample are summarized in table 1. The temperature during exposure ensured that vacancies were not mobile (in W, vacancies become mobile at 550-600 K [7,8]). …”

Section: Methodsmentioning

confidence: 99%

Deuterium retention in tungsten and tungsten–tantalum alloys exposed to high-flux deuterium plasmas

Zayachuk¹,

Hoen²,

Emmichoven³

et al. 2012

Nucl. Fusion

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A direct comparison of deuterium retention in samples of tungsten and two grades of tungsten-tantalum alloys-W1%Ta and W-5%Ta, exposed to deuterium plasmas (ion flux ∼10 24 m −2 s −1 , ion energy at the biased target ∼50 eV) at the plasma generator Pilot-PSI was performed using thermal desorption spectroscopy (TDS). No systematic difference in terms of total retention in tungsten and tungsten-tantalum was identified. The measured retention value for each grade did not deviate by more than 24% from the value averaged over the three grades exposed to the same conditions. No additional desorption peaks appeared in the TDS spectra of the W-Ta samples as compared with the W target, indicating that no additional kinds of traps are introduced by the alloying of W with Ta. In the course of the experiment the same samples were exposed to the same plasma conditions several times, and it is demonstrated that samples with the history of prior exposures yield an increase in deuterium retention of up to 130% under the investigated conditions compared with the samples that were not exposed before. We consider this as evidence that exposure of the considered materials to ions with energy below the displacement threshold generates additional traps for deuterium. The positions of the release peaks caused by these traps are similar for W and W-Ta, which indicates that the corresponding traps are of the same kind.

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Section: Methodsmentioning

confidence: 99%

Deuterium retention in tungsten and tungsten–tantalum alloys exposed to high-flux deuterium plasmas

Zayachuk¹,

Hoen²,

Emmichoven³

et al. 2012

Nucl. Fusion

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show abstract

“…The implanted ions flux is modelled using cascade debris calculated by Marlowe (a code based on binary collision approximation) [71]. This work includes experimental investigations on the nanovoid formation using Positron Annihilation Spectroscopy [72] and the simulation conditions have been chosen to model these experiments. Different fluences (implanted at 300 K) have been investigated ranging from 10 13 to 5 x 10 16 ions cm -2 .…”

Section: Simulationmentioning

confidence: 99%

Recent progress in research on tungsten materials for nuclear fusion applications in Europe

Rieth

Dudarev

Vicente³

et al. 2013

Journal of Nuclear Materials

653

281

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“…Thus the technique is particularly sensitive to the nature and concentration of vacancy defects in the sample. More details on DB-PAS could be found in [15,21].…”

Section: Positron Annihilation Spectroscopymentioning

confidence: 99%

Substrate temperature and ion kinetic energy effects on first steps of He+ implantation in tungsten: Experiments and simulations

et al. 2017

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First temperature stage evolution of irradiation-induced defects in tungsten studied by positron annihilation spectroscopy

Cited by 128 publications

References 17 publications

Deuterium retention in tungsten and tungsten–tantalum alloys exposed to high-flux deuterium plasmas

Deuterium retention in tungsten and tungsten–tantalum alloys exposed to high-flux deuterium plasmas

Recent progress in research on tungsten materials for nuclear fusion applications in Europe

Substrate temperature and ion kinetic energy effects on first steps of He+ implantation in tungsten: Experiments and simulations

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