Bulletin of the American Physical Society
22nd Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter
Volume 67, Number 8
Monday–Friday, July 11–15, 2022; Anaheim, California
Session M05: Defects and Microstructure
4:00 PM–5:30 PM,
Tuesday, July 12, 2022
Anaheim Marriott
Room: Platinum 3
Chair: Jon Eggert, Lawrence Livermore Natl Lab
Abstract: M05.00001 : Material property modification via ion implantation and its effects on strength and compressibility*
4:00 PM–4:30 PM
Presenter:
Camelia V Stan
(Lawrence Livermore Natl Lab)
Authors:
Camelia V Stan
(Lawrence Livermore Natl Lab)
Adam Golder
(Lawrence Livermore Natl Lab)
Swanee Shin
(Lawrence Livermore Natl Lab)
Scott Tumey
(Lawrence Livermore Natl Lab)
Yong-Jae Kim
(Lawrence Livermore Natl Lab)
Matthew P Hill
(AWE Plc)
Hye-Sook Park
(Lawrence Livermore Natl Lab)
Earl F O'Bannon
(Lawrence Livermore Natl Lab)
Suzanne J Ali
(Lawrence Livermore Natl Lab)
Robert E Rudd
(Lawrence Livermore Natl Lab)
Dave Braun
(Lawrence Livermore Natl Lab)
Tom Lockard
(Lawrence Livermore Natl Lab)
Philip D Powell
(Lawrence Livermore Natl Lab)
Damian C Swift
(Lawrence Livermore Natl Lab)
James M McNaney
(Lawrence Livermore Natl Lab)
The He implantation is performed at the Center for Accelerator Mass Spectrometry, by using a volumetric raster scan of a metal foil and varying the energy, He bubbles of varying sizes can be implanted within a ~10-50 um horizon. Due to the heat generated by the ion deposition process, a cooling stage was developed, which allows for an increase in bubble density as well as a decrease in bubble size by restricting He ion mobility through the metal in a controllable manner. The He bubble distribution is evaluated with TEM. The foils are then used in target fabrication for our experiments on the National Ignition Facility (NIF). The experimental strategy for the targets differs depending on the type of data to be acquired. Here, we will discuss their application in strength Rayleigh-Taylor (RT) experiments and planned equation of state (EOS) experiments. Several strength RT experiments have been performed on Pb, using multiple implantation levels and comparing to pure Pb. EOS experiments are currently being developed, using a novel two-part design. Overall, the implantation methodology combined with shock-ramped experiments gives us a new way to look at how nanoscale changes in material composition affect overall behavior under high-rate, laser-generated compression.
*This work was performed under the auspices of the U.S. DOE by LLNL under Contract DE-AC52-07NA27344.
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