Machining of Two-Dimensional Sinusoidal Defects on Ignition-Type Capsules to Study Hydrodynamic Instability at the National Ignition Facility

Giraldez, E. M.; Hoppe Jr., M. L.; Hoover, D. E.; Nguyen, A. Q.  L.; Rice, N. G.; Garcia, A. M.; Huang, H.; Mauldin, M. P.; Farrell, M. P.; Nikroo, A.; Smalyuk, V.

doi:10.13182/FST15-234

Machining of Two-Dimensional Sinusoidal Defects on Ignition-Type Capsules to Study Hydrodynamic Instability at the National Ignition Facility

Journal Article · Thu Jul 07 00:00:00 EDT 2016 · Fusion Science and Technology

DOI:https://doi.org/10.13182/FST15-234· OSTI ID:1342067

Giraldez, E. M. ^[1]; Hoppe Jr., M. L. ^[1]; Hoover, D. E. ^[1]; Nguyen, A. Q. L. ^[1]; Rice, N. G. ^[1]; Garcia, A. M. ^[1]; Huang, H. ^[1]; Mauldin, M. P. ^[1]; Farrell, M. P. ^[1]; Nikroo, A. ^[2]; Smalyuk, V. ^[2]

General Atomics, San Diego, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Hydrodynamic instability growth and its effects on capsule implosion performance are being studied at the National Ignition Facility (NIF). Experimental results have shown that low-mode instabilities are the primary culprit for yield degradation. Ignition type capsules with machined 2D sinusoidal defects were used to measure low-mode hydrodynamic instability growth in the acceleration phase of the capsule implosion. The capsules were imploded using ignition-relevant laser pulses and the ablation-front modulation growth was measured using x-ray radiography. The experimentally measured growth was in good agreement with simulations.

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344; NA0001808

OSTI ID:: 1342067

Report Number(s):: LLNL-JRNL--713918

Journal Information:: Fusion Science and Technology, Journal Name: Fusion Science and Technology Journal Issue: 2 Vol. 70; ISSN 1536-1055

Publisher:: American Nuclear SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Nonlinear growth of the converging Richtmyer-Meshkov instability in a conventional shock tube Vandenboomgaerde, Marc; Rouzier, Pascal; Souffland, Denis Physical Review Fluids, Vol. 3, Issue 1 https://doi.org/10.1103/physrevfluids.3.014001	journal	January 2018

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