Dynamic Exploding Foil Initiator Imaging at the Advanced Photon Source
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Atomic Weapons Establishment (AWE), Berkshire (United Kingdom)
- National Security Technologies LLC (NSTech), Los Alamos, NM (United States)
Recent advances in diagnostics coupled with synchrotron sources have allowed the in-situ investigation of exploding foil initiators (EFI) during flight. Herein, we present the first images of EFIs during flight utilizing x-ray phase contrast imaging at the Advanced Photon Source (APS) located in Argonne National Laboratory. These images have provided the DOE/DoD community with unprecedented images resolving details on the micron scale of the flyer formation, plasma instabilities and in-flight characteristics along with the subsequent interaction with high explosives on the nanosecond time scale. Phase contrast imaging has allowed the ability to make dynamic measurements on the length and time scale necessary to resolve initiator function and provide insight to key design parameters. These efforts have also probed the fundamental physics at “burst” to better understand what burst means in a physical sense, rather than the traditional understanding of burst as a peak in voltage and increase in resistance. This fundamental understanding has led to increased knowledge on the mechanisms of burst and has allowed us to improve our predictive capability through magnetohydrodnamic modeling. This manuscript presents results from several EFI designs along with a look to the future for upcoming work.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Washington State Univ., Pullman, WA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOD; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC52-06NA25396; AC02-06CH11357; NA0002442
- OSTI ID:
- 1600817
- Journal Information:
- AIP Conference Proceedings, Vol. 1979, Issue 2018; Conference: 20.American Physical Society Topical Conference on Shock Compression of Condensed Matter, St. Louis, MO (United States), 9-14 Jul 2017; ISSN 0094-243X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Web of Science
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