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Ceurvorst L, Theobald W, Rosenberg MJ, Radha PB, Stoeckl C, Betti R, Anderson KS, Marozas JA, Goncharov VN, Campbell EM, Shuldberg CM, Luo RW, Sweet W, Aghaian L, Carlson L, Bachmann B, Döppner T, Hohenberger M, Glize K, Scott RHH, Colaïtis A, Regan SP. Development of an x-ray radiography platform to study laser-direct-drive energy coupling at the National Ignition Facility. Rev Sci Instrum 2022; 93:105102. [PMID: 36319381 DOI: 10.1063/5.0098982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 08/14/2022] [Indexed: 06/16/2023]
Abstract
A platform has been developed to study laser-direct-drive energy coupling at the National Ignition Facility (NIF) using a plastic sphere target irradiated in a polar-direct-drive geometry to launch a spherically converging shock wave. To diagnose this system evolution, eight NIF laser beams are directed onto a curved Cu foil to generate Heα line emission at a photon energy of 8.4 keV. These x rays are collected by a 100-ps gated x-ray imager in the opposing port to produce temporally gated radiographs. The platform is capable of acquiring images during and after the laser drive launches the shock wave. A backlighter profile is fit to the radiographs, and the resulting transmission images are Abel inverted to infer radial density profiles of the shock front and to track its temporal evolution. The measurements provide experimental shock trajectories and radial density profiles that are compared to 2D radiation-hydrodynamic simulations using cross-beam energy transfer and nonlocal heat-transport models.
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Affiliation(s)
- L Ceurvorst
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - W Theobald
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - M J Rosenberg
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - P B Radha
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - C Stoeckl
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - R Betti
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - K S Anderson
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - J A Marozas
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - V N Goncharov
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - E M Campbell
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | | | - R W Luo
- General Atomics, San Diego, California 92121, USA
| | - W Sweet
- General Atomics, San Diego, California 92121, USA
| | - L Aghaian
- General Atomics, San Diego, California 92121, USA
| | - L Carlson
- General Atomics, San Diego, California 92121, USA
| | - B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Hohenberger
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K Glize
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Oxfordshire, OX11 0QX, United Kingdom
| | - R H H Scott
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Oxfordshire, OX11 0QX, United Kingdom
| | - A Colaïtis
- Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, Talence F-33405, France
| | - S P Regan
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
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Luo RW, Greenwood AL, Nikroo A, Chen C. Properties of Silicon-Doped GDP Shells Used for Cryogenic Implosions at OMEGA. Fusion Science and Technology 2009. [DOI: 10.13182/fst09-a7426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- R. W. Luo
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - A. L. Greenwood
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - A. Nikroo
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - C. Chen
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
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