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

Autor: Valdivia MP; Physics and Astronomy Department, Johns Hopkins University, Baltimore, Maryland 21218, USA., Stutman D; Physics and Astronomy Department, Johns Hopkins University, Baltimore, Maryland 21218, USA., Stoeckl C; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA., Theobald W; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA., Collins GW 4th; Center for Energy Research, University of California San Diego, San Diego, California 92093, USA., Bouffetier V; Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR5107, F-33405 Talence, France., Vescovi M; Pontificia Universidad Catolica de Chile, Casilla 306, Santiago, Chile., Mileham C; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA., Begishev IA; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA., Klein SR; University of Michigan, Ann Arbor, Michigan 48109, USA., Melean R; University of Michigan, Ann Arbor, Michigan 48109, USA., Muller S; General Atomics, Inertial Fusion Technology, San Diego, California 92921, USA., Zou J; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA., Veloso F; Pontificia Universidad Catolica de Chile, Casilla 306, Santiago, Chile., Casner A; CEA-CESTA, 15 avenue des Sablières, CS 60001, 33116 Le Barp CEDEX, France., Beg FN; Center for Energy Research, University of California San Diego, San Diego, California 92093, USA., Regan SP; Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
Jazyk: angličtina
Zdroj: The Review of scientific instruments [Rev Sci Instrum] 2021 Jun 01; Vol. 92 (6), pp. 065110.
DOI: 10.1063/5.0043655
Abstrakt: 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 >10 23  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.
Databáze: MEDLINE