Simulation of gross and net erosion of high-Z materials in the DIII-D divertor
Abstract
The three-dimensional Monte Carlo code ERO has been used to simulate dedicated DIII-D experiments in which Mo and W samples with different sizes were exposed to controlled and well-diagnosed divertor plasma conditions to measure the gross and net erosion rates. Experimentally, the net erosion rate is significantly reduced due to the high local redeposition probability of eroded high-Z materials, which according to the modelling is mainly controlled by the electric field and plasma density within the Chodura sheath. Similar redeposition ratios were obtained from ERO modelling with three different sheath models for small angles between the magnetic field and the material surface, mainly because of their similar mean ionization lengths. The modelled redeposition ratios are close to the measured value. Decreasing the potential drop across the sheath can suppress both gross and net erosion because sputtering yield is decreased due to lower incident energy while the redeposition ratio is not reduced owing to the higher electron density in the Chodura sheath. Taking into account material mixing in the ERO surface model, the net erosion rate of high-Z materials is shown to be strongly dependent on the carbon impurity concentration in the background plasma; higher carbon concentration can suppress net erosion.more »
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- General Atomics, San Diego, CA (United States); Chinese Academy of Sciences (CAS), Anhui (People's Republic of China); Oak Ridge Associated Univ., Oak Ridge, TN (United States)
- Univ. of Toronto, Toronto, ON (Canada)
- TU Wein, Vienna (Austria)
- Forschungszentrum Julich GmbH, Julich (Germany)
- General Atomics, San Diego, CA (United States); Chinese Academy of Sciences (CAS), Anhui (People's Republic of China)
- General Atomics, San Diego, CA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of Californa San Diego, La Jolla, CA (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1238648
- Alternate Identifier(s):
- OSTI ID: 1238813
- Report Number(s):
- SAND-2015-10258J
Journal ID: ISSN 0029-5515; 613827
- Grant/Contract Number:
- AC04-94AL85000; AC52-07NA27344; FC02-04ER54698; FG02-07ER54917; 2013GB107004
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 56; Journal Issue: 1; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Wampler, William R., Ding, R., Stangeby, P. C., Elder, J. D., Tskhakaya, D., Kirschner, A., Guo, H. Y., Chan, V. S., McLean, A. G., Snyder, P. B., and Rudakov, D. L. Simulation of gross and net erosion of high-Z materials in the DIII-D divertor. United States: N. p., 2015.
Web. doi:10.1088/0029-5515/56/1/016021.
Wampler, William R., Ding, R., Stangeby, P. C., Elder, J. D., Tskhakaya, D., Kirschner, A., Guo, H. Y., Chan, V. S., McLean, A. G., Snyder, P. B., & Rudakov, D. L. Simulation of gross and net erosion of high-Z materials in the DIII-D divertor. United States. https://doi.org/10.1088/0029-5515/56/1/016021
Wampler, William R., Ding, R., Stangeby, P. C., Elder, J. D., Tskhakaya, D., Kirschner, A., Guo, H. Y., Chan, V. S., McLean, A. G., Snyder, P. B., and Rudakov, D. L. Thu .
"Simulation of gross and net erosion of high-Z materials in the DIII-D divertor". United States. https://doi.org/10.1088/0029-5515/56/1/016021. https://www.osti.gov/servlets/purl/1238648.
@article{osti_1238648,
title = {Simulation of gross and net erosion of high-Z materials in the DIII-D divertor},
author = {Wampler, William R. and Ding, R. and Stangeby, P. C. and Elder, J. D. and Tskhakaya, D. and Kirschner, A. and Guo, H. Y. and Chan, V. S. and McLean, A. G. and Snyder, P. B. and Rudakov, D. L.},
abstractNote = {The three-dimensional Monte Carlo code ERO has been used to simulate dedicated DIII-D experiments in which Mo and W samples with different sizes were exposed to controlled and well-diagnosed divertor plasma conditions to measure the gross and net erosion rates. Experimentally, the net erosion rate is significantly reduced due to the high local redeposition probability of eroded high-Z materials, which according to the modelling is mainly controlled by the electric field and plasma density within the Chodura sheath. Similar redeposition ratios were obtained from ERO modelling with three different sheath models for small angles between the magnetic field and the material surface, mainly because of their similar mean ionization lengths. The modelled redeposition ratios are close to the measured value. Decreasing the potential drop across the sheath can suppress both gross and net erosion because sputtering yield is decreased due to lower incident energy while the redeposition ratio is not reduced owing to the higher electron density in the Chodura sheath. Taking into account material mixing in the ERO surface model, the net erosion rate of high-Z materials is shown to be strongly dependent on the carbon impurity concentration in the background plasma; higher carbon concentration can suppress net erosion. As a result, the principal experimental results such as net erosion rate and profile and redeposition ratio are well reproduced by the ERO simulations.},
doi = {10.1088/0029-5515/56/1/016021},
journal = {Nuclear Fusion},
number = 1,
volume = 56,
place = {United States},
year = {Thu Dec 17 00:00:00 EST 2015},
month = {Thu Dec 17 00:00:00 EST 2015}
}
Web of Science
Works referenced in this record:
Analytic description of the chemical erosion of graphite by hydrogen ions
journal, December 1996
- Roth, J.; Garcia-Rosales, C.
- Nuclear Fusion, Vol. 36, Issue 12
Tritium inventory in ITER plasma-facing materials and tritium removal procedures
journal, August 2008
- Roth, Joachim; Tsitrone, Emmanuelle; Loarer, Thierry
- Plasma Physics and Controlled Fusion, Vol. 50, Issue 10
A study of molybdenum influxes and transport in Alcator C-Mod
journal, May 2001
- Lipschultz, B.; Pappas, D. A.; LaBombard, B.
- Nuclear Fusion, Vol. 41, Issue 5
Tokamak operation with high- Z plasma facing components
journal, November 2005
- Kallenbach, A.; Neu, R.; Dux, R.
- Plasma Physics and Controlled Fusion, Vol. 47, Issue 12B
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
Fuel retention studies with the ITER-Like Wall in JET
journal, July 2013
- Brezinsek, S.; Loarer, T.; Philipps, V.
- Nuclear Fusion, Vol. 53, Issue 8
Plasma Edge Cooling during rf Heating
journal, June 1978
- Suckewer, S.; Hawryluk, R. J.
- Physical Review Letters, Vol. 40, Issue 25
Tungsten as target material in fusion devices
journal, June 1996
- Naujoks, D.; Asmussen, K.; Bessenrodt-Weberpals, M.
- Nuclear Fusion, Vol. 36, Issue 6
Monte Carlo simulations of tungsten redeposition at the divertor target
journal, January 2014
- Chankin, A. V.; Coster, D. P.; Dux, R.
- Plasma Physics and Controlled Fusion, Vol. 56, Issue 2
Plasma-wall interaction and plasma behaviour in the non-boronised all tungsten ASDEX Upgrade
journal, June 2009
- Dux, R.; Bobkov, V.; Herrmann, A.
- Journal of Nuclear Materials, Vol. 390-391
Simulation of the plasma-wall interaction in a tokamak with the Monte Carlo code ERO-TEXTOR
journal, May 2000
- Kirschner, A.; Philipps, V.; Winter, J.
- Nuclear Fusion, Vol. 40, Issue 5
Modeling of sputtering erosion/redeposition—status and implications for fusion design
journal, July 2002
- Brooks, Jeffrey N.
- Fusion Engineering and Design, Vol. 60, Issue 4
Analysis of C-MOD molybdenum divertor erosion and code/data comparison
journal, August 2011
- Brooks, J. N.; Allain, J. P.; Whyte, D. G.
- Journal of Nuclear Materials, Vol. 415, Issue 1
Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET
journal, July 2013
- van Rooij, G. J.; Coenen, J. W.; Aho-Mantila, L.
- Journal of Nuclear Materials, Vol. 438
Quantification of tungsten sputtering at W/C twin limiters in TEXTOR with the aid of local WF 6 injection
journal, December 2011
- Brezinsek, S.; Borodin, D.; Coenen, J. W.
- Physica Scripta, Vol. T145
An experimental comparison of gross and net erosion of Mo in the DIII-D divertor
journal, July 2013
- Stangeby, P. C.; Rudakov, D. L.; Wampler, W. R.
- Journal of Nuclear Materials, Vol. 438
Net versus gross erosion of high- Z materials in the divertor of DIII-D
journal, April 2014
- Rudakov, D. L.; Stangeby, P. C.; Wampler, W. R.
- Physica Scripta, Vol. T159
Measurements of net erosion and redeposition of molybdenum in DIII-D
journal, July 2013
- Wampler, W. R.; Stangeby, P. C.; Watkins, J. G.
- Journal of Nuclear Materials, Vol. 438
Interpretive modeling of simple-as-possible-plasma discharges on DIII-D using the OEDGE code
journal, March 2003
- Stangeby, P. C.; Elder, J. D.; Boedo, J. A.
- Journal of Nuclear Materials, Vol. 313-316
Towards radiation transport modelling in divertors with the EIRENE code
journal, August 2002
- Reiter, D.; Wiesen, S.; Born, M.
- Plasma Physics and Controlled Fusion, Vol. 44, Issue 8
Flux dependence of carbon erosion and implication for ITER
journal, March 2005
- Roth, J.; Kirschner, A.; Bohmeyer, W.
- Journal of Nuclear Materials, Vol. 337-339
Simulation of light emission from hydrocarbon injection in TEXTOR using the ERO code
journal, April 2009
- Ding, R.; Kirschner, A.; Borodin, D.
- Plasma Physics and Controlled Fusion, Vol. 51, Issue 5
Estimations of erosion fluxes, material deposition and tritium retention in the divertor of ITER
journal, June 2009
- Kirschner, A.; Borodin, D.; Philipps, V.
- Journal of Nuclear Materials, Vol. 390-391
Advanced simulation of mixed-material erosion/evolution and application to low and high-Z containing plasma facing components
journal, July 2013
- Brooks, J. N.; Hassanein, A.; Sizyuk, T.
- Journal of Nuclear Materials, Vol. 438
Plasma–wall transition in an oblique magnetic field
journal, January 1982
- Chodura, R.
- Physics of Fluids, Vol. 25, Issue 9
Theory of the collisional presheath in an oblique magnetic field
journal, March 1994
- Riemann, K. ‐U.
- Physics of Plasmas, Vol. 1, Issue 3
Near‐surface sputtered particle transport for an oblique incidence magnetic field plasma
journal, August 1990
- Brooks, J. N.
- Physics of Fluids B: Plasma Physics, Vol. 2, Issue 8
The Chodura sheath for angles of a few degrees between the magnetic field and the surface of divertor targets and limiters
journal, July 2012
- Stangeby, P. C.
- Nuclear Fusion, Vol. 52, Issue 8
Interpretation of divertor Langmuir probe measurements during the ELMs at JET
journal, August 2011
- Tskhakaya, D.; Jachmich, S.; Eich, T.
- Journal of Nuclear Materials, Vol. 415, Issue 1
Optimization of PIC codes by improved memory management
journal, July 2007
- Tskhakaya, D.; Schneider, R.
- Journal of Computational Physics, Vol. 225, Issue 1
Kinetic (PIC) simulations of the magnetized plasma–wall transition
journal, April 2005
- Tskhakaya, D.; Kuhn, S.
- Plasma Physics and Controlled Fusion, Vol. 47, Issue 5A
Control of high-Z PFC erosion by local gas injection in DIII-D
journal, August 2015
- Rudakov, D. L.; Stangeby, P. C.; Wong, C. P. C.
- Journal of Nuclear Materials, Vol. 463
Works referencing / citing this record:
Effects of carbon impurities on the power radiation and tungsten target erosion in EAST
journal, July 2018
- Sang, Chaofeng; Ding, Rui; Bonnin, Xavier
- Physics of Plasmas, Vol. 25, Issue 7
Impact of ELM control techniques on tungsten sputtering in the DIII-D divertor and extrapolations to ITER
journal, June 2019
- Abrams, T.; Unterberg, E. A.; Rudakov, D. L.
- Physics of Plasmas, Vol. 26, Issue 6
Material testing facilities and programs for plasma-facing component testing
journal, June 2017
- Linsmeier, Ch.; Unterberg, B.; Coenen, J. W.
- Nuclear Fusion, Vol. 57, Issue 9
ERO modeling and sensitivity analysis of locally enhanced beryllium erosion by magnetically connected antennas
journal, December 2017
- Lasa, A.; Borodin, D.; Canik, J. M.
- Nuclear Fusion, Vol. 58, Issue 1
DIII-D research towards establishing the scientific basis for future fusion reactors
journal, June 2019
- Petty, C. C.
- Nuclear Fusion, Vol. 59, Issue 11