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Title: Talbot-Lau x-ray deflectometer: Refraction-based HEDP imaging diagnostic

Conference · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/5.0043655· OSTI ID:1887901
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [2];  [3]; ORCiD logo [4];  [5];  [2];  [2]; ORCiD logo [6];  [6];  [7];  [2]; ORCiD logo [5]; ORCiD logo [8]; ORCiD logo [3];  [2]
  1. Physics and Astronomy Department, Johns Hopkins University 1 , Baltimore, Maryland 21218, USA
  2. Laboratory for Laser Energetics, University of Rochester 2 , Rochester, New York 14623, USA
  3. Center for Energy Research, University of California San Diego 3 , San Diego, California 92093, USA
  4. Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR5107 4 , F-33405 Talence, France
  5. Pontificia Universidad Catolica de Chile 5 , Casilla 306, Santiago, Chile
  6. University of Michigan 6 , Ann Arbor, Michigan 48109, USA
  7. General Atomics, Inertial Fusion Technology 7 , San Diego, California 92921, USA
  8. CEA-CESTA 8 , 15 avenue des Sablières, CS 60001, 33116 Le Barp CEDEX, France

Talbot-Lau x-ray interferometry has been implemented to map electron density gradients in High Energy Density Physics (HEDP) experiments. X-ray backlighter targets have been evaluated for Talbot-Lau X-ray Deflectometry (TXD). Cu foils, wires, and sphere targets have been irradiated by 10–150 J, 8–30 ps laser pulses, while two pulsed-power generators (∼350 kA, 350 ns and ∼200 kA, 150 ns) have driven Cu wire, hybrid, and laser-cut x-pinches. A plasma ablation front generated by the Omega EP laser was imaged for the first time through TXD for densities >1023 cm−3. Backlighter optimization in combination with x-ray CCD, image plates, and x-ray film has been assessed in terms of spatial resolution and interferometer contrast for accurate plasma characterization through TXD in pulsed-power and high-intensity laser environments. The results obtained thus far demonstrate the potential of TXD as a powerful diagnostic for HEDP.

Research Organization:
UCSD
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
DOE Contract Number:
NA0004028
OSTI ID:
1887901
Journal Information:
Review of Scientific Instruments, Vol. 92, Issue 6; Conference: 23rd Topical Conference on High-Temperature Plasma Diagnostics, December 14-17, 2020; ISSN 0034-6748
Country of Publication:
United States
Language:
English

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