Innovations in the vapor deposition of metal coatings for target payloads in laser-based physics experiments under extreme conditions

Journal Article · Fri May 24 00:00:00 EDT 2019 · Journal of Vacuum Science and Technology B

DOI:https://doi.org/10.1116/1.5094909· OSTI ID:1526225

Jankowski, Alan F. ^[1]

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1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)

The synthesis of metal foils with unique surface features such as waves and steps is of interest for use as payloads in targets for laser-driven physics experiments under dynamic loading conditions. Changes to the surface features are used to quantify the effects of the material strength during the deformation at high-strain rate high pressure. Additionally, a traditional path to produce these target features is by precision machining processes using diamond tools. Limitations are encountered since many of the materials of interest and the size of the surface features are not often compatible with conventional machining-process methods. An alternative method to produce targets with unique surface features is through vapor synthesis. Two general approaches are taken—one is by replicating the features from the surface of a substrate mandrel, whereas the second is by using hard masks with timed exposure to the deposition vapor. In these approaches, postdeposition removal of a release layer yields a free-standing target with the desired surface features. Here, specific cases are presented for the physical vapor deposition of copper, aluminum, iron, vanadium, and tantalum to form targets with multiple layers, steps, and sinusoidal surface waves.

• Research Organization: Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1526225
• Report Number(s): SAND--2019-5745J; 675743
• Journal Information: Journal of Vacuum Science and Technology B, Journal Name: Journal of Vacuum Science and Technology B Journal Issue: 3 Vol. 37; ISSN 2166-2746
• Publisher: American Vacuum Society/AIP
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS