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Title: Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry

Abstract

In our work, we apply low energy ion beam analysis to examine directly how the adsorbed hydrogen concentration and binding configuration on W(1 0 0) depend on temperature. We exposed the tungsten surface to fluxes of both atomic and molecular H and D. We then probed the H isotopes adsorbed along different crystal directions using 1–2 keV Ne+ ions. At saturation coverage, H occupies two-fold bridge sites on W(1 0 0) at 25 °C. Moreover, the H coverage dramatically changes the behavior of channeled ions, as does reconstruction of the surface W atoms. For the exposure conditions examined here, we find that surface sites remain populated with H until the surface temperature reaches 200 °C. Then, we observe H rapidly desorbing until only a residual concentration remains at 450 °C. Development of an efficient atomistic model that accurately reproduces the experimental ion energy spectra and azimuthal variation of recoiled H is underway.

Authors:
 [1];  [2];  [1];  [1];  [2]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1145778
Alternate Identifier(s):
OSTI ID: 1252242
Report Number(s):
SAND-2014-4300J
Journal ID: ISSN 0022-3115; PII: S0022311514009222
Grant/Contract Number:  
AC04-94AL85000; SC00-02060
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 463; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Kolasinski, R. D., Hammond, K. D., Whaley, J. A., Buchenauer, D. A., and Wirth, B. D. Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry. United States: N. p., 2014. Web. doi:10.1016/j.jnucmat.2014.11.115.
Kolasinski, R. D., Hammond, K. D., Whaley, J. A., Buchenauer, D. A., & Wirth, B. D. Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry. United States. https://doi.org/10.1016/j.jnucmat.2014.11.115
Kolasinski, R. D., Hammond, K. D., Whaley, J. A., Buchenauer, D. A., and Wirth, B. D. Wed . "Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry". United States. https://doi.org/10.1016/j.jnucmat.2014.11.115. https://www.osti.gov/servlets/purl/1145778.
@article{osti_1145778,
title = {Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry},
author = {Kolasinski, R. D. and Hammond, K. D. and Whaley, J. A. and Buchenauer, D. A. and Wirth, B. D.},
abstractNote = {In our work, we apply low energy ion beam analysis to examine directly how the adsorbed hydrogen concentration and binding configuration on W(1 0 0) depend on temperature. We exposed the tungsten surface to fluxes of both atomic and molecular H and D. We then probed the H isotopes adsorbed along different crystal directions using 1–2 keV Ne+ ions. At saturation coverage, H occupies two-fold bridge sites on W(1 0 0) at 25 °C. Moreover, the H coverage dramatically changes the behavior of channeled ions, as does reconstruction of the surface W atoms. For the exposure conditions examined here, we find that surface sites remain populated with H until the surface temperature reaches 200 °C. Then, we observe H rapidly desorbing until only a residual concentration remains at 450 °C. Development of an efficient atomistic model that accurately reproduces the experimental ion energy spectra and azimuthal variation of recoiled H is underway.},
doi = {10.1016/j.jnucmat.2014.11.115},
journal = {Journal of Nuclear Materials},
number = C,
volume = 463,
place = {United States},
year = {Wed Dec 03 00:00:00 EST 2014},
month = {Wed Dec 03 00:00:00 EST 2014}
}

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Cited by: 9 works
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Works referenced in this record:

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Works referencing / citing this record:

Hydrogen interactions with low-index surface orientations of tungsten
journal, April 2019

  • Bergstrom, Z. J.; Li, C.; Samolyuk, G. D.
  • Journal of Physics: Condensed Matter, Vol. 31, Issue 25
  • DOI: 10.1088/1361-648x/ab0f6b

A density functional theory based thermodynamic model of hydrogen coverage on the W(110) surface
journal, January 2020