Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session BP11: Poster Session I: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: Analytical,computational; Energetic Particles; Disruptions; Power Handling
ICF: Z-Pinch; MagnetoInertial Fusion; Hydrodynamics; Indirect drive
9:30 AM - 12:30 PM
Monday, October 17, 2022
Room: Exhibit Hall A and Online
Abstract: BP11.00090 : Structural characterization and deuterium ion irradiation effects of tantalum as an absorbing first wall material*
Presenter:
Danah Velez
(University of Wisconsin-Madison)
Authors:
Danah Velez
(University of Wisconsin-Madison)
Mykola Ialovega
(CEA Cadarache, Univ. of Wisconsin-Madison)
Marcos X Navarro
(University of Wisconsin - Madison)
Kumar Sridharan
(University of Wisconsin - Madison)
Hwasung Yeom
(University of Wisconsin - Madison)
Tyler Dabney
(University of Wisconsin - Madison)
Jay K Anderson
(University of Wisconsin)
Cary B Forest
(University of Wisconsin - Madison)
Oliver Schmitz
(University of Wisconsin - Madison)
Collaboration:
WHAM
Tantalum’s hydrogen absorbing properties make it an interesting first wall candidate for many fusion research devices. It will be first tested in WHAM, a compact high-field mirror with high auxiliary heating power, where cold-sprayed Ta powder is adhered on stainless steel walls of the vacuum chamber. The cold sprayed technique created dense Ta coatings with enhanced hardness compared to bulk Ta. The cold-spray process enhances the hardness compared to bulk Ta and remained adhered to the substrate during multiple annealing cycles up to 1200 K and during D ion bombardment at 95 eV with 3*1025 D/m2 fluence. The microstructure of the coatings have been characterized at the surface and in the bulk before and after plasma exposure. Measurements with x-ray diffraction (XRD) revealed expansion of the crystal lattice following ion irradiation at a surface temperature of 523 K as well as an increase in residual stress by a factor of 2. The increase in residual stress after ion irradiation signifies probable D embedding in the lattice. Thermal desorption spectroscopy (TDS) performed on pristine cold sprayed Ta implanted with D ions showed significant outgassing of D, with the most substantial release of D above 900 K.
*This work was funded in part by the U.S. Department of Energy under grant DE-AR0001258 and grant 144-AAI1377 by discretionary funding from the University of Wisconsin-Madison College of Engineering.
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