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Title: Variable convergence liquid layer implosions on the National Ignition Facility

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5016349· OSTI ID:1435526
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. General Atomics, San Diego, CA (United States)

Liquid layer implosions using the “wetted foam” technique, where the liquid fuel is wicked into a supporting foam, have been recently conducted on the National Ignition Facility for the first time [Olson et al., Phys. Rev. Lett. 117, 245001 (2016)]. In this paper, we report on a series of wetted foam implosions where the convergence ratio was varied between 12 and 20. Reduced nuclear performance is observed as convergence ratio increases. 2-D radiation-hydrodynamics simulations accurately capture the performance at convergence ratios (CR) ~ 12, but we observe a significant discrepancy at CR ~ 20. Finally, this may be due to suppressed hot-spot formation or an anomalous energy loss mechanism.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
Grant/Contract Number:
AC52-06NA25396; AC52-07NA27344; NA0001808
OSTI ID:
1435526
Alternate ID(s):
OSTI ID: 1426844
Report Number(s):
LA-UR-17-29966; TRN: US1900065
Journal Information:
Physics of Plasmas, Vol. 25, Issue 5; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (5)

Observation of persistent species temperature separation in inertial confinement fusion mixtures journal January 2020
Probing the seeding of hydrodynamic instabilities from nonuniformities in ablator materials using 2D velocimetry journal September 2018
Robustness to hydrodynamic instabilities in indirectly driven layered capsule implosions journal January 2019
Effects of thermal conductivity of liquid layer in NIF wetted foam experiments journal September 2019
Kinetic physics in ICF: present understanding and future directions journal April 2018

Figures / Tables (10)