The influence of fusion-relevant D2-0.1He plasma on Be-W mixed-materials

Jepu, I.; Baldwin, M. J.; Nishijima, D.; Doerner, R. P.; Porosnicu, C.; Lungu, C. P.; Dinca, P.; Marin, A.

doi:10.1016/j.jnucmat.2016.10.031

Title: The influence of fusion-relevant D₂-0.1He plasma on Be-W mixed-materials

Abstract

We report compositionally homogeneous mixed-material layers of Be and W, ∼2 μm thick, and of various W contents (spanning 0–100 at.% W), are produced by thermionic vacuum arc deposition. The layers are exposed to low energy (∼50 eV), high ion flux (6–8 × 10²²m⁻² s⁻¹) D₂-0.1He (10% He) mixed species plasma at 473 K and 1073 K to simulate ITER-like first wall and divertor plasma-material interaction. Surface morphological and compositional analysis is conducted prior and subsequent to plasma exposure. The action of the plasma produces almost complete depletion of Be from the near surface, and this is found regardless of the exposure temperature or initial composition. In the exposure case of 473 K, thermal desorption spectrometry reveals decreased D retention in W rich compositions compared to similar exposure in D₂ plasma without He, but no discernable difference is noted in Be rich compositions. At 1073 K, surface enrichment in W, by depletion of the Be, results in He induced W “fuzz” structures for all Be-W compositions explored.

Authors:

^[1]; Baldwin, M. J. ^[2]; Nishijima, D. ^[2]; Doerner, R. P. ^[2]; Porosnicu, C. ^[1]; Lungu, C. P. ^[1]; Dinca, P. ^[3]; Marin, A. ^[4]

National Institute for Laser, Plasma and Radiation Physics, Magurele (Romania)
University of California San Diego, La Jolla, CA (United States)
National Institute for Laser, Plasma and Radiation Physics, Magurele (Romania); University of Bucharest (Romania)
Institute of Physical Chemistry, Bucharest (Romania); Institute for Nuclear Research, Mioveni (Romania)

Publication Date:: Sat Oct 22 00:00:00 EDT 2016

Research Org.:: Univ. of California, San Diego, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC); EUROfusion

OSTI Identifier:: 1534016

Alternate Identifier(s):: OSTI ID: 1396837

Grant/Contract Number:: FG02-07ER54912; WP12-EU-US; #DE-FG02-07ER54912

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Nuclear Materials

Additional Journal Information:: Journal Volume: 484; Journal Issue: C; Journal ID: ISSN 0022-3115

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Jepu, I., Baldwin, M. J., Nishijima, D., Doerner, R. P., Porosnicu, C., Lungu, C. P., Dinca, P., and Marin, A. The influence of fusion-relevant D2-0.1He plasma on Be-W mixed-materials.  United States: N. p., 2016. 
Web.  doi:10.1016/j.jnucmat.2016.10.031.

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                    Jepu, I., Baldwin, M. J., Nishijima, D., Doerner, R. P., Porosnicu, C., Lungu, C. P., Dinca, P., & Marin, A. The influence of fusion-relevant D2-0.1He plasma on Be-W mixed-materials.  United States.  https://doi.org/10.1016/j.jnucmat.2016.10.031

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                    Jepu, I., Baldwin, M. J., Nishijima, D., Doerner, R. P., Porosnicu, C., Lungu, C. P., Dinca, P., and Marin, A. Sat .  
"The influence of fusion-relevant D2-0.1He plasma on Be-W mixed-materials".  United States.  https://doi.org/10.1016/j.jnucmat.2016.10.031.  https://www.osti.gov/servlets/purl/1534016.

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@article{osti_1534016,

  title        = {The influence of fusion-relevant D2-0.1He plasma on Be-W mixed-materials},

  author       = {Jepu, I. and Baldwin, M. J. and Nishijima, D. and Doerner, R. P. and Porosnicu, C. and Lungu, C. P. and Dinca, P. and Marin, A.},

  abstractNote = {We report compositionally homogeneous mixed-material layers of Be and W, ∼2 μm thick, and of various W contents (spanning 0–100 at.% W), are produced by thermionic vacuum arc deposition. The layers are exposed to low energy (∼50 eV), high ion flux (6–8 × 1022 m−2 s−1) D2-0.1He (10% He) mixed species plasma at 473 K and 1073 K to simulate ITER-like first wall and divertor plasma-material interaction. Surface morphological and compositional analysis is conducted prior and subsequent to plasma exposure. The action of the plasma produces almost complete depletion of Be from the near surface, and this is found regardless of the exposure temperature or initial composition. In the exposure case of 473 K, thermal desorption spectrometry reveals decreased D retention in W rich compositions compared to similar exposure in D2 plasma without He, but no discernable difference is noted in Be rich compositions. At 1073 K, surface enrichment in W, by depletion of the Be, results in He induced W “fuzz” structures for all Be-W compositions explored.},

  doi          = {10.1016/j.jnucmat.2016.10.031},

  journal      = {Journal of Nuclear Materials},

  number       = C,

  volume       = 484,

  place        = {United States},

  year         = {Sat Oct 22 00:00:00 EDT 2016},

  month        = {Sat Oct 22 00:00:00 EDT 2016}

}

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Works referenced in this record:

Key ITER plasma edge and plasma–material interaction issues
journal, March 2003

Federici, G.; Andrew, P.; Barabaschi, P.
Journal of Nuclear Materials, Vol. 313-316
DOI: 10.1016/S0022-3115(02)01327-2

Chapter 4: Power and particle control
journal, June 2007

Loarte, A.; Lipschultz, B.; Kukushkin, A. S.
Nuclear Fusion, Vol. 47, Issue 6
DOI: 10.1088/0029-5515/47/6/S04

Effect of He on D retention in W exposed to low-energy, high-fluence (D, He, Ar) mixture plasmas
journal, August 2011

Baldwin, M. J.; Doerner, R. P.; Wampler, W. R.
Nuclear Fusion, Vol. 51, Issue 10
DOI: 10.1088/0029-5515/51/10/103021

Hydrogen isotope retention in beryllium for tokamak plasma-facing applications
journal, June 1999

Anderl, R. A.; Causey, R. A.; Davis, J. W.
Journal of Nuclear Materials, Vol. 273, Issue 1
DOI: 10.1016/S0022-3115(99)00022-7

The Influence of a Beryllium Containing Plasma on the Evolution of a Mixed-Material Surface
journal, January 2004

Doerner, R. P.; Baldwin, M. J.; Schmid, K.
Physica Scripta, Vol. T111, Issue 1
DOI: 10.1238/Physica.Topical.111a00075

Helium induced nanoscopic morphology on tungsten under fusion relevant plasma conditions
journal, January 2008

Baldwin, M. J.; Doerner, R. P.
Nuclear Fusion, Vol. 48, Issue 3
DOI: 10.1088/0029-5515/48/3/035001

Observations of suppressed retention and blistering for tungsten exposed to deuterium–helium mixture plasmas
journal, May 2009

Miyamoto, M.; Nishijima, D.; Ueda, Y.
Nuclear Fusion, Vol. 49, Issue 6
DOI: 10.1088/0029-5515/49/6/065035

The influence of displacement damage on deuterium retention in tungsten exposed to plasma
journal, September 2009

Wampler, W. R.; Doerner, R. P.
Nuclear Fusion, Vol. 49, Issue 11
DOI: 10.1088/0029-5515/49/11/115023

Beryllium flux distribution and layer deposition in the ITER divertor
journal, September 2008

Schmid, K.
Nuclear Fusion, Vol. 48, Issue 10
DOI: 10.1088/0029-5515/48/10/105004

Temperature influence on deuterium retention for Be–W mixed thin films prepared by Thermionic Vacuum Arc method exposed to PISCES B plasma
journal, August 2015

Jepu, I.; Doerner, R. P.; Baldwin, M. J.
Journal of Nuclear Materials, Vol. 463
DOI: 10.1016/j.jnucmat.2014.10.029

Formation of nanostructured Re–Cr–Ni diffusion barrier coatings on Nb superalloys by TVA method
journal, October 2005

Lungu, C. P.; Mustata, I.; Musa, G.
Surface and Coatings Technology, Vol. 200, Issue 1-4
DOI: 10.1016/j.surfcoat.2005.02.172

Giant magneto-resistive granular layers deposited by TVA method
journal, November 2004

Mustata, I.; Lungu, C. P.; Lungu, A. M.
Vacuum, Vol. 76, Issue 2-3
DOI: 10.1016/j.vacuum.2004.07.003

Combinatorial Fe–Co thin film magnetic structures obtained by thermionic vacuum arc method
journal, February 2014

Jepu, I.; Porosnicu, C.; Lungu, C. P.
Surface and Coatings Technology, Vol. 240
DOI: 10.1016/j.surfcoat.2013.12.050

Deuterium retention in liquid lithium
journal, October 2002

Baldwin, M. J.; Doerner, R. P.; Luckhardt, S. C.
Nuclear Fusion, Vol. 42, Issue 11
DOI: 10.1088/0029-5515/42/11/305

Spectroscopic determination of the singly ionized helium density in low electron temperature plasmas mixed with helium in a linear divertor plasma simulator
journal, October 2007

Nishijima, D.; Doerner, R. P.; Baldwin, M. J.
Physics of Plasmas, Vol. 14, Issue 10
DOI: 10.1063/1.2786063

Erosion study of Fe–W binary mixed layer prepared as model system for RAFM steel
journal, August 2015

Sugiyama, K.; Roth, J.; Alimov, V. Kh.
Journal of Nuclear Materials, Vol. 463
DOI: 10.1016/j.jnucmat.2014.11.044

Impact of surface morphology on sputtering during high-fluence plasma exposure
journal, April 2014

Doerner, R. P.; Nishijima, D.; Schwarz-Selinger, T.
Physica Scripta, Vol. T159
DOI: 10.1088/0031-8949/2014/T159/014040

Be–W alloy formation in static and divertor-plasma simulator experiments
journal, June 2007

Baldwin, M. J.; Doerner, R. P.; Nishijima, D.
Journal of Nuclear Materials, Vol. 363-365
DOI: 10.1016/j.jnucmat.2007.01.151

Binary beryllium–tungsten mixed materials
journal, June 2007

Linsmeier, Ch.; Ertl, K.; Roth, J.
Journal of Nuclear Materials, Vol. 363-365
DOI: 10.1016/j.jnucmat.2007.01.224

Formation of a surface alloy in the beryllium–tungsten system
journal, March 2005

Wiltner, A.; Linsmeier, Ch.
Journal of Nuclear Materials, Vol. 337-339
DOI: 10.1016/j.jnucmat.2004.08.021

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Title: The influence of fusion-relevant D2-0.1He plasma on Be-W mixed-materials

Abstract

Citation Formats

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Chapter 4: Power and particle control journal, June 2007

Effect of He on D retention in W exposed to low-energy, high-fluence (D, He, Ar) mixture plasmas journal, August 2011

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Observations of suppressed retention and blistering for tungsten exposed to deuterium–helium mixture plasmas journal, May 2009

The influence of displacement damage on deuterium retention in tungsten exposed to plasma journal, September 2009

Beryllium flux distribution and layer deposition in the ITER divertor journal, September 2008

Temperature influence on deuterium retention for Be–W mixed thin films prepared by Thermionic Vacuum Arc method exposed to PISCES B plasma journal, August 2015

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Spectroscopic determination of the singly ionized helium density in low electron temperature plasmas mixed with helium in a linear divertor plasma simulator journal, October 2007

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Title: The influence of fusion-relevant D₂-0.1He plasma on Be-W mixed-materials

Key ITER plasma edge and plasma–material interaction issues
journal, March 2003

Chapter 4: Power and particle control
journal, June 2007

Effect of He on D retention in W exposed to low-energy, high-fluence (D, He, Ar) mixture plasmas
journal, August 2011

Hydrogen isotope retention in beryllium for tokamak plasma-facing applications
journal, June 1999

The Influence of a Beryllium Containing Plasma on the Evolution of a Mixed-Material Surface
journal, January 2004

Helium induced nanoscopic morphology on tungsten under fusion relevant plasma conditions
journal, January 2008

Observations of suppressed retention and blistering for tungsten exposed to deuterium–helium mixture plasmas
journal, May 2009

The influence of displacement damage on deuterium retention in tungsten exposed to plasma
journal, September 2009

Beryllium flux distribution and layer deposition in the ITER divertor
journal, September 2008

Temperature influence on deuterium retention for Be–W mixed thin films prepared by Thermionic Vacuum Arc method exposed to PISCES B plasma
journal, August 2015

Formation of nanostructured Re–Cr–Ni diffusion barrier coatings on Nb superalloys by TVA method
journal, October 2005

Giant magneto-resistive granular layers deposited by TVA method
journal, November 2004

Combinatorial Fe–Co thin film magnetic structures obtained by thermionic vacuum arc method
journal, February 2014

Deuterium retention in liquid lithium
journal, October 2002

Spectroscopic determination of the singly ionized helium density in low electron temperature plasmas mixed with helium in a linear divertor plasma simulator
journal, October 2007

Erosion study of Fe–W binary mixed layer prepared as model system for RAFM steel
journal, August 2015

Impact of surface morphology on sputtering during high-fluence plasma exposure
journal, April 2014

Be–W alloy formation in static and divertor-plasma simulator experiments
journal, June 2007

Binary beryllium–tungsten mixed materials
journal, June 2007

Formation of a surface alloy in the beryllium–tungsten system
journal, March 2005