Observations and Modeling of Debris and Shrapnel Impacts on Optics and Diagnostics at the National Ignition Facility
A wide range of targets with laser energies spanning two orders of magnitude have been shot at the National Ignition Facility (NIF). The National Ignition Campaign (NIC) targets are cryogenic with Si supports and cooling rings attached to an Al thermo-mechanical package (TMP) with a thin (30 micron) Au hohlraum inside. Particular attention is placed on the low-energy shots where the TMP is not completely vaporized. In addition to NIC targets, a range of other targets has also been fielded on NIF. For all targets, simulations play a critical role in determining if the risks associated with debris and shrapnel are acceptable. In a number of cases, experiments were redesigned, based on simulations, to reduce risks or to obtain data. The majority of these simulations were done using the ALE-AMR code, which provides efficient late-time (100-1000X the pulse duration) 3D calculations of complex NIF targets.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 1035282
- Report Number(s):
- LLNL-PROC-512071; TRN: US1200998
- Resource Relation:
- Journal Volume: 59; Conference: Presented at: International Fusion Science and Applications (IFSA), Bordeaux, France, Sep 12 - Sep 16, 2011
- Country of Publication:
- United States
- Language:
- English
ALE-AMR: A new 3D multi-physics code for modeling laser/target effects
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journal | August 2010 |
A test cassette for x-ray-exposure experiments at the National Ignition Facility
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journal | July 2010 |
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