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Title: A platform for thin-layer Richtmyer-Meshkov at OMEGA and the NIF

Journal Article · · High Energy Density Physics

Imperfections at the interface between the ablator and fuel in an ICF capsule can give rise the Richtmyer-Meshkov instability (RMI). The effects of multiple shocks on this impulse-driven instability has been well studied in traditional, low energy density (LED) regimes, but work is limited in the high energy density (HED) regime. Instability and turbulent characteristics are difficult to diagnose in an ICF capsule, with its three dimensional and converging geometry. This paper highlights the platform development of a new planar HED experiment at the OMEGA and NIF laser facilities designed specifically to study the feedthrough of the RMI in a thin layer. Using a simple shock and then re-shock setup, Multi-shock (MshockReshock experiment to produce a well-defined mixing layer post-shock and reshock. Localized doping profiles have been developed to improve feature contrast, and reduce edge effects. A series of initial conditions have been precision machined and characterized for comparison, though the effects of preheat are distorting these profiles. First results quantifying the growth via the mixing layer width have been made with an 1D Eulerian code and an 1D RANS mix-model.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1558712
Alternate ID(s):
OSTI ID: 1558070
Report Number(s):
LA-UR-19-23287; S1574181819300461; 100705; PII: S1574181819300461
Journal Information:
High Energy Density Physics, Journal Name: High Energy Density Physics Vol. 33 Journal Issue: C; ISSN 1574-1818
Publisher:
ElsevierCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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