DiMES PMI research at DIII-D in support of ITER and beyond

Rudakov, Dimitry L.; Abrams, Tyler; Ding, Rui; Guo, Houyang Y.; Stangeby, Peter C.; Wampler, William R.; Boedo, Jose A.; Briesemeister, Alexis R.; Brooks, J. N.; Buchenauer, Dean A.; Bykov, Igor; Chrobak, Chris; Doerner, R. P.; Donovan, David C.; Elder, J. David; Fenstermacher, Max E.; Guterl, Jerome; Hinson, Edward T.; Hollmann, Eric M.; Lasnier, Charles J.; Leonard, Anthony W.; McLean, Adam G.; Moyer, Richard A.; Nygren, R. E.; Thomas, Dan M.; Unterberg, Ezekial A.; Watkins, Jonathan G.; Wong, C. P. C.

doi:10.1016/j.fusengdes.2017.03.007

Title: DiMES PMI research at DIII-D in support of ITER and beyond

Journal Article · 27 March 2017 · Fusion Engineering and Design

DOI: https://doi.org/10.1016/j.fusengdes.2017.03.007 · OSTI ID:1375007

Rudakov, Dimitry L. ^[1]; Abrams, Tyler ^[2]; Ding, Rui ^[3]; Guo, Houyang Y. ^[2]; Stangeby, Peter C. ^[4]; Wampler, William R. ^[5]; Boedo, Jose A. ^[1]; Briesemeister, Alexis R. ^[6]; Brooks, J. N. ^[7]; Buchenauer, Dean A. ^[8]; Bykov, Igor ^[1]; Chrobak, Chris ^[2]; Doerner, R. P. ^[1]; Donovan, David C. ^[9]; Elder, J. David ^[4]; Fenstermacher, Max E. ^[10]; Guterl, Jerome ^[3]; Hinson, Edward T. ^[11]; Hollmann, Eric M. ^[1]; Lasnier, Charles J. ^[10] more »

Univ. of California, San Diego, La Jolla, CA (United States)
General Atomics, San Diego, CA (United States)
Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Univ. of Toronto Institute for Aerospace Studies, Toronto (Canada)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Purdue Univ., West Lafayette, IN (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Wisconsin, Madison, WI (United States)

An overview of recent Plasma-Material Interactions (PMI) research at the DIII-D tokamak using the Divertor Material Evaluation System (DiMES) is presented. The DiMES manipulator allows for exposure of material samples in the lower divertor of DIII-D under well-diagnosed ITER-relevant plasma conditions. Plasma parameters during the exposures are characterized by an extensive diagnostic suite including a number of spectroscopic diagnostics, Langmuir probes, IR imaging, and Divertor Thomson Scattering. Post-mortem measurements of net erosion/deposition on the samples are done by Ion Beam Analysis, and results are modelled by the ERO and REDEP/WBC codes with plasma background reproduced by OEDGE/DIVIMP modelling based on experimental inputs. This article highlights experiments studying sputtering erosion, re-deposition and migration of high-Z elements, mostly tungsten and molybdenum, as well as some alternative materials. Results are generally encouraging for use of high-Z PFCs in ITER and beyond, showing high redeposition and reduced net sputter erosion. Two methods of high-Z PFC surface erosion control, with (i) external electrical biasing and (ii) local gas injection, are also discussed. Furthermore, these techniques may find applications in the future devices.

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Research Organization:: General Atomics, San Diego, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC)

Grant/Contract Number:: FC02-04ER54698; AC05-00OR22725; AC52-07NA27344; AC05-06OR23100; AC04-94AL85000; DE AC05-00OR22725; FG02-07ER54917; GA-DE-SC0008698

OSTI ID:: 1375007

Alternate ID(s):: OSTI ID: 1483172; OSTI ID: 1497289; OSTI ID: 1550473

Report Number(s):: LLNL-JRNL-703329; PII: S0920379617302107

Journal Information:: Fusion Engineering and Design, Vol. 124; ISSN 0920-3796

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 17 works

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