Development of an x-ray radiography platform to study laser-direct-drive energy coupling at the National Ignition Facility-Reference-Cited by-同舟云学术

Development of an x-ray radiography platform to study laser-direct-drive energy coupling at the National Ignition Facility

Published:2022-10-01 Issue:10 Volume:93 Page:105102
ISSN:0034-6748
Container-title:Review of Scientific Instruments
language:en
Short-container-title:Review of Scientific Instruments

Author:

Ceurvorst L.¹^ORCID,Theobald W.¹²^ORCID,Rosenberg M. J.¹^ORCID,Radha P. B.¹^ORCID,Stoeckl C.¹^ORCID,Betti R.¹²,Anderson K. S.¹^ORCID,Marozas J. A.¹^ORCID,Goncharov V. N.¹²^ORCID,Campbell E. M.¹^ORCID,Shuldberg C. M.³^ORCID,Luo R. W.³,Sweet W.³,Aghaian L.³,Carlson L.³,Bachmann B.⁴^ORCID,Döppner T.⁴^ORCID,Hohenberger M.⁴^ORCID,Glize K.⁵^ORCID,Scott R. H. H.⁵^ORCID,Colaïtis A.⁶^ORCID,Regan S. P.¹²^ORCID

Affiliation:

1. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA

2. Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA

3. General Atomics, San Diego, California 92121, USA

4. Lawrence Livermore National Laboratory, Livermore, California 94550, USA

5. Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Oxfordshire, OX11 0QX, United Kingdom

6. Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, Talence F-33405, France

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 He α 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.

Funder

National Nuclear Security Administration

Publisher

AIP Publishing

Subject

Instrumentation

Link

https://aip.scitation.org/doi/am-pdf/10.1063/5.0098982

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