Studies of lithiumization and boronization of ATJ graphite PFCs in NSTX-U

Domínguez-Gutiérrez, F. J.; Bedoya, F.; Krstic, P. S.; Allain, J. P.; Neff, A. L.; Luitjohan, K.

doi:10.1016/j.nme.2016.12.028

Title: Studies of lithiumization and boronization of ATJ graphite PFCs in NSTX-U

Journal Article · Tue Dec 27 00:00:00 EST 2016 · Nuclear Materials and Energy

DOI:https://doi.org/10.1016/j.nme.2016.12.028· OSTI ID:1534181

Domínguez-Gutiérrez, F. J. ^[1]; Bedoya, F. ^[2]; Krstic, P. S. ^[1]; Allain, J. P. ^[2]; Neff, A. L. ^[2]; Luitjohan, K. ^[3]

Stony Brook Univ., NY (United States). Inst. for Advanced Computational Science
Univ. of Illinois at Urbana-Champaign, IL (United States). Dept. of Nuclear, Plasma and Radiological Engineering
Purdue Univ., West Lafayette, IN (United States). School of Material Engineering

This work examines the effect of boron and lithium conditioned ATJ graphite surface bombarded by low-energy deuterium atoms on the deuterium retention and chemical sputtering. We use atomistic simulations and compare them with experimental in situ studies with x-ray photoelectron spectroscopy (XPS), to understand the effects of deuterium irradiation on the chemistry in lithiated, boronized and oxidized amorphous carbon surfaces. Our results are validated qualitatively by comparison with experiments and with quantum classical molecular dynamic simulations. We explain the important role of oxygen in D retention for lithiated surfaces and the suppression of oxygen role by boron in boronized surfaces. The calculated increase of the oxygen role in deuterium uptake after D accumulation in B–C–O surface configuration is discussed. The sputtering yield per low energy D impact is significantly smaller in boronized than in lithiated surfaces.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Univ. of Illinois at Urbana-Champaign, IL (United States); Stony Brook Univ., NY (United States)

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

Grant/Contract Number:: SC0010717; SC0013752

OSTI ID:: 1534181

Journal Information:: Nuclear Materials and Energy, Vol. 12; ISSN 2352-1791

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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Cited By (3)

Unraveling the surface chemistry processes in lithiated and boronized plasma material interfaces under extreme conditions Krstic, P. S.; Allain, J. P.; Dominguez-Gutierrez, F. J. Matter and Radiation at Extremes, Vol. 3, Issue 4 https://doi.org/10.1016/j.mre.2018.03.003	journal	July 2018
Effect of deuterium irradiation on graphite boronized in the NSTX-U tokamak Bedoya, F.; Allain, J. P.; Dominguez-Gutierrez, F. J. Scientific Reports, Vol. 9, Issue 1 https://doi.org/10.1038/s41598-019-38941-9	journal	February 2019
Deuterium uptake and sputtering of simultaneous lithiated, boronized, and oxidized carbon surfaces irradiated by low-energy deuterium Domínguez-Gutiérrez, F. J.; Krstić, P. S.; Allain, J. P. Journal of Applied Physics, Vol. 123, Issue 19 https://doi.org/10.1063/1.5026415	journal	May 2018

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Title: Studies of lithiumization and boronization of ATJ graphite PFCs in NSTX-U

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