Bulletin of the American Physical Society
60th Annual Meeting of the APS Division of Plasma Physics
Volume 63, Number 11
Monday–Friday, November 5–9, 2018; Portland, Oregon
Session BO5: DIII-D Tokamak
9:30 AM–12:30 PM,
Monday, November 5, 2018
OCC
Room: B113-114
Chair: Walter Guttenfelder, PPPL
Abstract ID: BAPS.2018.DPP.BO5.10
Abstract: BO5.00010 : Assessing erosion and retention of silicon carbide based materials in DIII-D divertor**
11:18 AM–11:30 AM
Presenter:
Stefan Bringuier
(General Atomics)
Authors:
Stefan Bringuier
(General Atomics)
Tyler W Abrams
(General Atomics)
Ezekial Unterberg
(Oak Ridge National Laboratory)
Dmitry Rudakov
(University of California - San Diego)
Gokul Vasudevamurthy
(General Atomics)
Sean Gonderman
(General Atomics)
Robert Wilcox
(Oak Ridge National Laboratory)
Dean Alan Buchenauer
(Sandia National Laboratories)
William Raymond Wampler
(Sandia National Laboratories)
Guinevere Shaw
(University of Tennessee - Knoxville, Oak Ridge National Laboratory)
Brian Wirth
(University of Tennessee - Knoxville, Oak Ridge National Laboratory)
Dan Thomas
(General Atomics)
Leo Holland
(General Atomics)
A series of experiments performed on DIII-D have exposed SiC based materials to a variety of plasma conditions using the DiMES apparatus in order to better characterize local gross erosion and hydrogenic retention. Our most recent results suggest that SiC is less susceptible to chemical sputtering as compared to graphite and is not solely due to the stoichiometric reduction in carbon. Furthermore, within the silicon physical sputtering regime, inclusion of silicon surface enrichment of SiC is necessary to account for differences between predictions and experiments. An extended effort to characterize the hydrogen retention of exposed samples and the influence of SiC microstructure are obtained using TDS, NRA, and LIMS-LIBS along with SEM and EBSD, as this is historically, a primary concern with SiC. The combination of techniques enables association of grain boundaries and orientation with aerial and depth profiles of deuterium implanted during DIII-D experiments. These results provide a needed dataset for SiC and further motivate in identifying plasma-facing materials that exhibit limited erosion and chemical reactivity but are thermally conductive, thermomechanically tough, and low-Z by nature.
** Work supported under USDOE Cooperative Agreement DE-FC02-04ER54698.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.BO5.10
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700