Investigation of He–W interactions using DiMES on DIII-D

Doerner, R. P.; Rudakov, D. L.; Chrobak, C. P.; Briesemeister, A. R.; Corr, C.; De Temmerman, G.; Kluth, P.; Lasnier, C. J.; McLean, A. G.; Pace, D. C.; Pitts, R. A.; Schmitz, O.; Thompson, M.; Winters, V.

doi:10.1088/0031-8949/T167/1/014054

Title: Investigation of He–W interactions using DiMES on DIII-D

Abstract

Tungsten button samples were exposed to He ELMing H-mode plasma in DIII-D using 2.3 MW of Electron Cyclotron heating power. Prior to the exposures, the W buttons were exposed to either He, or D, plasma in PISCES-A for 2000 seconds at surface temperatures of 225–850 C to create a variety of surfaces (surface blisters, subsurface nano-bubbles, fuzz). Erosion was spectroscopically measured from each DiMES sample, with the exception of the fuzzy W samples which showed almost undetectable WI emission. Post-exposure grazing incidence small angle x-ray scattering (GISAXS) surface analysis showed the formation of 1.5 nm diameter He bubbles in the surface of W buttons after only a single DIII-D (3 sec., ~150 ELMs) discharge, similar to the bubble layer resulting from the 2000 sec. exposure in PISCES-A. No surface roughening, or damage, was detected on the samples after approximately 600 ELMs with energy density between 0.04 – 0.1 MJm-2.

Authors:

Doerner, R. P. ^[1]; Rudakov, D. L. ^[1]; Chrobak, C. P. ^[2]; Briesemeister, A. R. ^[3]; Corr, C. ^[4]; De Temmerman, G. ^[5]; Kluth, P. ^[4]; Lasnier, C. J. ^[6]; McLean, A. G. ^[6]; Pace, D. C. ^[2]; Pitts, R. A. ^[5]; Schmitz, O. ^[7]; Thompson, M. ^[4]; Winters, V. ^[7]

Univ. of California, San Diego, CA (United States). Center for Energy Research
General Atomics, San Diego, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Australian National Univ., Canberra, ACT (Australia). Research School of Physics and Engineering
ITER Organization, Saint Paul-Lez-Durance (France)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Wisconsin, Madison, WI (United States)

Publication Date:: Fri Jan 22 00:00:00 EST 2016

Research Org.:: Univ. of California, San Diego, CA (United States); Univ. of Wisconsin, Madison, WI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); General Atomics, San Diego, CA (United States)

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

Contributing Org.:: ITER Organization, Saint Paul-Lez-Durance (France); Australian National Univ., Canberra, ACT (Australia)

OSTI Identifier:: 1319233

Alternate Identifier(s):: OSTI ID: 1372317

Grant/Contract Number:: FG02-07ER54917; FG02-89ER53296; FG02-08ER54999; FG02-07ER54912; AC52-07NA27344; AC05-00OR22725; FC02-04ER54698

Resource Type:: Accepted Manuscript

Journal Name:: Physica Scripta

Additional Journal Information:: Journal Volume: 2016; Journal Issue: T167; Journal ID: ISSN 0031-8949

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; tungsten; helium; DIII-D

Citation Formats


                    Doerner, R. P., Rudakov, D. L., Chrobak, C. P., Briesemeister, A. R., Corr, C., De Temmerman, G., Kluth, P., Lasnier, C. J., McLean, A. G., Pace, D. C., Pitts, R. A., Schmitz, O., Thompson, M., and Winters, V. Investigation of He–W interactions using DiMES on DIII-D.  United States: N. p., 2016. 
Web.  doi:10.1088/0031-8949/T167/1/014054.

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                    Doerner, R. P., Rudakov, D. L., Chrobak, C. P., Briesemeister, A. R., Corr, C., De Temmerman, G., Kluth, P., Lasnier, C. J., McLean, A. G., Pace, D. C., Pitts, R. A., Schmitz, O., Thompson, M., & Winters, V. Investigation of He–W interactions using DiMES on DIII-D.  United States.  https://doi.org/10.1088/0031-8949/T167/1/014054

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                    Doerner, R. P., Rudakov, D. L., Chrobak, C. P., Briesemeister, A. R., Corr, C., De Temmerman, G., Kluth, P., Lasnier, C. J., McLean, A. G., Pace, D. C., Pitts, R. A., Schmitz, O., Thompson, M., and Winters, V. Fri .  
"Investigation of He–W interactions using DiMES on DIII-D".  United States.  https://doi.org/10.1088/0031-8949/T167/1/014054.  https://www.osti.gov/servlets/purl/1319233.

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@article{osti_1319233,

  title        = {Investigation of He–W interactions using DiMES on DIII-D},

  author       = {Doerner, R. P. and Rudakov, D. L. and Chrobak, C. P. and Briesemeister, A. R. and Corr, C. and De Temmerman, G. and Kluth, P. and Lasnier, C. J. and McLean, A. G. and Pace, D. C. and Pitts, R. A. and Schmitz, O. and Thompson, M. and Winters, V.},

  abstractNote = {Tungsten button samples were exposed to He ELMing H-mode plasma in DIII-D using 2.3 MW of Electron Cyclotron heating power. Prior to the exposures, the W buttons were exposed to either He, or D, plasma in PISCES-A for 2000 seconds at surface temperatures of 225–850 C to create a variety of surfaces (surface blisters, subsurface nano-bubbles, fuzz). Erosion was spectroscopically measured from each DiMES sample, with the exception of the fuzzy W samples which showed almost undetectable WI emission. Post-exposure grazing incidence small angle x-ray scattering (GISAXS) surface analysis showed the formation of 1.5 nm diameter He bubbles in the surface of W buttons after only a single DIII-D (3 sec., ~150 ELMs) discharge, similar to the bubble layer resulting from the 2000 sec. exposure in PISCES-A. No surface roughening, or damage, was detected on the samples after approximately 600 ELMs with energy density between 0.04 – 0.1 MJm-2.},

  doi          = {10.1088/0031-8949/T167/1/014054},

  journal      = {Physica Scripta},

  number       = T167,

  volume       = 2016,

  place        = {United States},

  year         = {Fri Jan 22 00:00:00 EST 2016},

  month        = {Fri Jan 22 00:00:00 EST 2016}

}

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Works referenced in this record:

Research status and issues of tungsten plasma facing materials for ITER and beyond
journal, October 2014

Ueda, Y.; Coenen, J. W.; De Temmerman, G.
Fusion Engineering and Design, Vol. 89, Issue 7-8
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Overview of ASDEX Upgrade results
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Kallenbach, A.; Adamek, J.; Aho-Mantila, L.
Nuclear Fusion, Vol. 51, Issue 9
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Plasma operation with an all metal first-wall: Comparison of an ITER-like wall with a carbon wall in JET
journal, July 2013

Matthews, G. F.
Journal of Nuclear Materials, Vol. 438
DOI: 10.1016/j.jnucmat.2013.01.282

A design retrospective of the DIII-D tokamak
journal, May 2002

Luxon, J. L.
Nuclear Fusion, Vol. 42, Issue 5
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Plasma surface interaction experimental facility (PISCES) for materials and edge physics studies
journal, May 1984

Goebel, D. M.; Campbell, G.; Conn, R. W.
Journal of Nuclear Materials, Vol. 121
DOI: 10.1016/0022-3115(84)90135-1

Microscopic damage of tungsten exposed to deuterium–helium mixture plasma in PISCES and its impacts on retention property
journal, August 2011

Miyamoto, M.; Nishijima, D.; Baldwin, M. J.
Journal of Nuclear Materials, Vol. 415, Issue 1
DOI: 10.1016/j.jnucmat.2011.01.008

Formation of Nanostructured Tungsten with Arborescent Shape due to Helium Plasma Irradiation
journal, January 2006

Takamura, Shuichi; Ohno, Noriyasu; Nishijima, Dai
Plasma and Fusion Research, Vol. 1
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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
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Formation mechanism of bubbles and holes on tungsten surface with low-energy and high-flux helium plasma irradiation in NAGDIS-II
journal, August 2004

Nishijima, Dai; Ye, M. Y.; Ohno, N.
Journal of Nuclear Materials, Vol. 329-333
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Helium effects on tungsten under fusion-relevant plasma loading conditions
journal, July 2013

De Temmerman, G.; Bystrov, K.; Doerner, R. P.
Journal of Nuclear Materials, Vol. 438
DOI: 10.1016/j.jnucmat.2013.01.012

Near-surface thermal characterization of plasma facing components using the 3-omega method
journal, December 2014

Dechaumphai, Edward; Barton, Joseph L.; Tesmer, Joseph R.
Journal of Nuclear Materials, Vol. 455, Issue 1-3
DOI: 10.1016/j.jnucmat.2014.03.059

Sputtering properties of tungsten ‘fuzzy’ surfaces
journal, August 2011

Nishijima, D.; Baldwin, M. J.; Doerner, R. P.
Journal of Nuclear Materials, Vol. 415, Issue 1
DOI: 10.1016/j.jnucmat.2010.12.017

A full tungsten divertor for ITER: Physics issues and design status
journal, July 2013

Pitts, R. A.; Carpentier, S.; Escourbiac, F.
Journal of Nuclear Materials, Vol. 438
DOI: 10.1016/j.jnucmat.2013.01.008

Probing helium nano-bubble formation in tungsten with grazing incidence small angle x-ray scattering
journal, March 2015

Thompson, M.; Kluth, P.; Doerner, R. P.
Nuclear Fusion, Vol. 55, Issue 4
DOI: 10.1088/0029-5515/55/4/042001

Tungsten ‘fuzz’ growth re-examined: the dependence on ion fluence in non-erosive and erosive helium plasma
journal, August 2015

Petty, T. J.; Baldwin, M. J.; Hasan, M. I.
Nuclear Fusion, Vol. 55, Issue 9
DOI: 10.1088/0029-5515/55/9/093033

Works referencing / citing this record:

The influence of plasma-surface interaction on the performance of tungsten at the ITER divertor vertical targets
journal, March 2018

De Temmerman, G.; Hirai, T.; Pitts, R. A.
Plasma Physics and Controlled Fusion, Vol. 60, Issue 4
DOI: 10.1088/1361-6587/aaaf62

Plasma Power Recycling at the Divertor Surface
journal, January 2017

Tang, Xian-Zhu; Guo, Zehua
Fusion Science and Technology, Vol. 71, Issue 1
DOI: 10.13182/fst16-119

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Title: Investigation of He–W interactions using DiMES on DIII-D

Abstract

Citation Formats

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