Effect of deuterium irradiation on graphite boronized in the NSTX-U tokamak

Bedoya, F.; Allain, J. P.; Dominguez-Gutierrez, F. J.; Krstic, P. S.

doi:10.1038/s41598-019-38941-9

Title: Effect of deuterium irradiation on graphite boronized in the NSTX-U tokamak

Journal Article · Thu Feb 21 00:00:00 EST 2019 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-019-38941-9· OSTI ID:1611507

^[1];

^[2]; Dominguez-Gutierrez, F. J. ^[3];

^[4]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Univ. of Illinois at Urbana-Champaign, IL (United States)
Max Planck Inst. for Plasma Physics, Garching (Germany)
Stony Brook Univ., NY (United States)

Boronization has been used in the National Spherical Torus-Upgrade (NSTX-U) as first wall conditioning technique. The technique decreased the oxygen impurities in the plasma and the O% on the Plasma Facing Components (PFC) as measured with an in-vacuo probe. Samples were extracted from tiles removed from the tokamak for post-mortem and controlled studies. Ex-vessel low energy and fluence D2+ and Ar+ irradiations were characterized in-situ to elucidate surface evolution of a cored graphite sample with an intrinsic concentration of boron from a tokamak environment. In addition, quadrupole mass spectrometer measurements of emitted D-containing species during irradiation, indicate potential retention of D by the boronized graphite interface and correlated back to the surface chemistry evolution. Classical Molecular Dynamics (CMD) simulations were used to investigate the chemistry of the B-C-O-D system. The results suggest that boron coatings retain oxygen by forming oxidized boron states in the presence of deuterium plasmas and corroborate empirical findings. A four times increase in the O% of the boron coatings was observed following in-situ deuterium exposures, in contrast with a reduction of equal magnitude observed after Ar irradiations. These results illustrate the complex chemistry driven by energetic ions at the edge of tokamaks plasmas on the PFCs.

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Research Organization:: Univ. of Illinois at Urbana-Champaign, IL (United States); State Univ. of New York (SUNY), Albany, NY (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0010717; SC0013752; SC0014264

OSTI ID:: 1611507

Journal Information:: Scientific Reports, Vol. 9, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (42)

Oxidation behaviour of boron carbide Zehringer, R.; Künzli, H.; Oelhafen, P. Journal of Nuclear Materials, Vol. 176-177 https://doi.org/10.1016/0022-3115(90)90074-W	journal	December 1990
The role of oxygen in the uptake of deuterium in lithiated graphite Taylor, C. N.; Dadras, J.; Luitjohan, K. E. Journal of Applied Physics, Vol. 114, Issue 22 https://doi.org/10.1063/1.4841115	journal	December 2013
Implementation and benchmark tests of the DFTB method and its application in the ONIOM method Zheng, Guishan; Lundberg, Marcus; Jakowski, Jacek International Journal of Quantum Chemistry, Vol. 109, Issue 9 https://doi.org/10.1002/qua.22002	journal	January 2009
Sputtering of lithiated and oxidated carbon surfaces by low-energy deuterium irradiation Domínguez-Gutiérrez, F. J.; Krstić, P. S. Journal of Nuclear Materials, Vol. 492 https://doi.org/10.1016/j.jnucmat.2017.05.014	journal	August 2017
Initial studies of plasma facing component surface conditioning in the national spherical tokamak experiment upgrade with the materials analysis particle probe Bedoya, F.; Allain, J. P.; Kaita, R. Nuclear Materials and Energy, Vol. 12 https://doi.org/10.1016/j.nme.2017.03.035	journal	August 2017
Oxygen retention in D-ion-irradiated B4C and boron-doped graphites Alimov, V. Kh.; Zalavutdinov, R. Kh.; Scherzer, B. M. U. Journal of Nuclear Materials, Vol. 212-215 https://doi.org/10.1016/0022-3115(94)91070-7	journal	September 1994
Fusion energy conversion in magnetically confined plasma reactors Dobran, Flavio Progress in Nuclear Energy, Vol. 60 https://doi.org/10.1016/j.pnucene.2012.05.008	journal	September 2012
Effect of boronization on ohmic plasmas in NSTX Skinner, C. H.; Kugel, H. W.; Maingi, R. Nuclear Fusion, Vol. 42, Issue 3 https://doi.org/10.1088/0029-5515/42/3/313	journal	March 2002
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
Chemical response of lithiated graphite with deuterium irradiation Taylor, C. N.; Heim, B.; Allain, J. P. Journal of Applied Physics, Vol. 109, Issue 5 https://doi.org/10.1063/1.3555097	journal	March 2011
Surface chemistry analysis of lithium conditioned NSTX graphite tiles correlated to plasma performance Taylor, C. N.; Luitjohan, K. E.; Heim, B. Fusion Engineering and Design, Vol. 88, Issue 12 https://doi.org/10.1016/j.fusengdes.2013.09.007	journal	December 2013
Chemical and physical erosion of carbon and metallic substrates containing lithium during low-energy deuterium ion irradiation Nieto-Perez, M.; Allain, J. P.; Heim, B. Journal of Nuclear Materials, Vol. 415, Issue 1 https://doi.org/10.1016/j.jnucmat.2010.10.078	journal	August 2011
Ion fluence dependence on chemical behavior of energetic deuterium implanted into oxygen-contained boron film Miyauchi, H.; Yoshikawa, A.; Oyaidzu, M. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2007.01.116	journal	June 2007
Progress toward commissioning and plasma operation in NSTX-U Ono, M.; Chrzanowski, J.; Dudek, L. Nuclear Fusion, Vol. 55, Issue 7 https://doi.org/10.1088/0029-5515/55/7/073007	journal	June 2015
Unraveling wall conditioning effects on plasma facing components in NSTX-U with the Materials Analysis Particle Probe (MAPP) Bedoya, F.; Allain, J. P.; Kaita, R. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4955276	journal	July 2016
Tokamak wall coatings Winter, J. Plasma Physics and Controlled Fusion, Vol. 36, Issue 12B https://doi.org/10.1088/0741-3335/36/12B/022	journal	December 1994
Review of in Situ Boronization in Contemporary Tokamaks Buzhinskij, Oleg I.; Semenets, Yuri M. Fusion Technology, Vol. 32, Issue 1 https://doi.org/10.13182/FST97-A19875	journal	August 1997
Studies of lithiumization and boronization of ATJ graphite PFCs in NSTX-U Domínguez-Gutiérrez, F. J.; Bedoya, F.; Krstic, P. S. Nuclear Materials and Energy, Vol. 12 https://doi.org/10.1016/j.nme.2016.12.028	journal	August 2017
Fast Parallel Algorithms for Short-Range Molecular Dynamics Plimpton, Steve Journal of Computational Physics, Vol. 117, Issue 1 https://doi.org/10.1006/jcph.1995.1039	journal	March 1995
General atom-bond electronegativity equalization method and its application in prediction of charge distributions in polypeptide Cong, Yao; Yang, Zhong-Zhi Chemical Physics Letters, Vol. 316, Issue 3-4 https://doi.org/10.1016/S0009-2614(99)01289-0	journal	January 2000
Comparison of profile tailing in SIMS analyses of various impurities in silicon using nitrogen, oxygen, and neon ion beams at near-normal incidence Homma, Y.; Wittmaack, K. Applied Physics A Solids and Surfaces, Vol. 50, Issue 4 https://doi.org/10.1007/BF00323600	journal	April 1990
ReaxFF: A Reactive Force Field for Hydrocarbons van Duin, Adri C. T.; Dasgupta, Siddharth; Lorant, Francois The Journal of Physical Chemistry A, Vol. 105, Issue 41 https://doi.org/10.1021/jp004368u	journal	October 2001
ReaxFF Reactive Force Field Development and Applications for Molecular Dynamics Simulations of Ammonia Borane Dehydrogenation and Combustion Weismiller, Michael R.; van Duin, Adri C. T.; Lee, Jongguen The Journal of Physical Chemistry A, Vol. 114, Issue 17 https://doi.org/10.1021/jp100136c	journal	April 2010
Molecular Dynamics Simulations of Laser-Induced Incandescence of Soot Using an Extended ReaxFF Reactive Force Field Kamat, Amar M.; van Duin, Adri C. T.; Yakovlev, Alexei The Journal of Physical Chemistry A, Vol. 114, Issue 48 https://doi.org/10.1021/jp1080302	journal	December 2010
Dynamics of deuterium retention and sputtering of Li–C–O surfaces Krstic, Predrag S.; Allain, Jean Paul; Allouche, Alain Fusion Engineering and Design, Vol. 87, Issue 10 https://doi.org/10.1016/j.fusengdes.2011.07.009	journal	October 2012
Advances in boronization on NSTX-Upgrade Skinner, C. H.; Bedoya, F.; Scotti, F. Nuclear Materials and Energy, Vol. 12 https://doi.org/10.1016/j.nme.2016.11.024	journal	August 2017
On the role of Gibbsian segregation in causing preferential sputtering Kelly, Roger Surface and Interface Analysis, Vol. 7, Issue 1 https://doi.org/10.1002/sia.740070102	journal	February 1985
Combustion of an Illinois No. 6 coal char simulated using an atomistic char representation and the ReaxFF reactive force field Castro-Marcano, Fidel; Kamat, Amar M.; Russo, Michael F. Combustion and Flame, Vol. 159, Issue 3 https://doi.org/10.1016/j.combustflame.2011.10.022	journal	March 2012
Unraveling the plasma-material interface with real time diagnosis of dynamic boron conditioning in extreme tokamak plasmas Domínguez-Gutiérrez, F. Javier; Bedoya, Felipe; Krstić, Predrag S. Nuclear Fusion, Vol. 57, Issue 8 https://doi.org/10.1088/1741-4326/aa7b17	journal	July 2017
Electronegativity-equalization method for the calculation of atomic charges in molecules Mortier, Wilfried J.; Ghosh, Swapan K.; Shankar, S. Journal of the American Chemical Society, Vol. 108, Issue 15 https://doi.org/10.1021/ja00275a013	journal	July 1986
Overview of NSTX Upgrade initial results and modelling highlights Menard, J. E.; Allain, J. P.; Battaglia, D. J. Nuclear Fusion, Vol. 57, Issue 10, Article No. 102006 https://doi.org/10.1088/1741-4326/aa600a	journal	June 2017
Material migration in divertor tokamaks Matthews, G. F. Journal of Nuclear Materials, Vol. 337-339 https://doi.org/10.1016/j.jnucmat.2004.10.075	journal	March 2005
Wall conditioning in fusion devices and its influence on plasma performance Winter, J. Plasma Physics and Controlled Fusion, Vol. 38, Issue 9 https://doi.org/10.1088/0741-3335/38/9/001	journal	September 1996
Cold boronisation in TCA Hollenstein, Ch.; Duval, B. P.; de Wit, T. Dudok Journal of Nuclear Materials, Vol. 176-177 https://doi.org/10.1016/0022-3115(90)90070-4	journal	December 1990
Boronization in textor Winter, J.; Esser, H. G.; Könen, L. Journal of Nuclear Materials, Vol. 162-164 https://doi.org/10.1016/0022-3115(89)90352-8	journal	April 1989
Material erosion and migration in tokamaks Pitts, R. A.; Coad, J. P.; Coster, D. P. Plasma Physics and Controlled Fusion, Vol. 47, Issue 12B https://doi.org/10.1088/0741-3335/47/12B/S22	journal	November 2005
Deuterium Uptake in Magnetic-Fusion Devices with Lithium-Conditioned Carbon Walls Krstic, P. S.; Allain, J. P.; Taylor, C. N. Physical Review Letters, Vol. 110, Issue 10 https://doi.org/10.1103/PhysRevLett.110.105001	journal	March 2013
Scenario development during commissioning operations on the National Spherical Torus Experiment Upgrade Battaglia, D. J.; Boyer, M. D.; Gerhardt, S. Nuclear Fusion, Vol. 58, Issue 4 https://doi.org/10.1088/1741-4326/aaa6e0	journal	February 2018
Plasma-material interactions in current tokamaks and their implications for next step fusion reactors Federici, G.; Skinner, C. H.; Brooks, J. N. Nuclear Fusion, Vol. 41, Issue 12 https://doi.org/10.1088/0029-5515/41/12/218	journal	December 2001
Chemical sputtering of boronized and oxidized carbon surfaces irradiated by low-energy deuterium atoms Domínguez-Gutiérrez, F. J.; Krstić, P. S. Journal of Applied Physics, Vol. 121, Issue 21 https://doi.org/10.1063/1.4984756	journal	June 2017
Scenario Development During Commissioning Operations on the National Spherical Torus Experiment Upgrade Battaglia, D.; Boyer, M.; Gerhardt, S. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1562052	dataset	January 2018
Continuous Improvement of H-Mode Discharge Performance with Progressively Increasing Lithium Coatings in the National Spherical Torus Experiment Maingi, R.; Kaye, S. M.; Skinner, C. H. Physical Review Letters, Vol. 107, Issue 14 https://doi.org/10.1103/physrevlett.107.145004	journal	September 2011

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