This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/27496 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.nme.2019.03.018 in citations.
Investigation of hydrogen isotope retention mechanisms in beryllium: High resolution TPD measurements
Investigation of hydrogen isotope retention mechanisms in beryllium: High resolution TPD measurements
The retention of ion-implanted deuterium in beryllium poly- and single crystals at room temperature is studied using high precision temperature programmed desorption spectroscopy (TPD). Slow temperature ramps of 0.01 K/s in combination with well-defined experimental conditions are used to resolve th...
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Personal Name(s): | Eichler, Michael (Corresponding author) |
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Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Nuclear materials and energy, 19 (2019) S. 440 - 444 |
Imprint: |
Amsterdam [u.a.]
Elsevier
2019
|
DOI: |
10.1016/j.nme.2019.03.018 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1016/j.nme.2019.03.018 in citations.
The retention of ion-implanted deuterium in beryllium poly- and single crystals at room temperature is studied using high precision temperature programmed desorption spectroscopy (TPD). Slow temperature ramps of 0.01 K/s in combination with well-defined experimental conditions are used to resolve the low temperature desorption regime for the first time revealing three sharp desorption peaks. The comparison to results of a coupled reaction diffusion system (CRDS) model shows, that the corresponding release mechanisms cannot be described by thermally activated rate processes. SEM images of a polycrystalline beryllium sample after implantation of deuterium with 2 keV per D atom show the formation of blisters of roughly 1 µm in diameter. Additionally, cracks on top of the blisters are found as well as spots, on which blisters are peeled off. Both processes are discussed to play a role in the low temperature release regime of the retained deuterium. Investigation of TPD spectra performed on single crystalline beryllium shows a jagged pattern in the low temperature release regime, which can be connected to blisters bursting up, releasing big amounts of deuterium in short time scales. |