Analysis and modeling of phase contrast radiography of gradient density laser targets

Maurice B. Aufderheide*, William D. Brown, Alex V. Hamza, Hye Sook Park, Harry E. Martz, Bruce A. Remington, John A. Rogers, Saekwoo Jeon, Yun Suk Nam

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Laser experiments, such as those planned at the National Ignition Facility (NIF) and the Omega facility, use small targets with the goal of studying high-energy density physics and inertial confinement fusion. One particular application is a target with layers whose density changes in a carefully designed gradient (from 0.2 to 1.2 g/cm3) for use in isentropic compression experiments (ICE). We are nondestructively determining the density of these layers using two X-ray microscopes. Because of the many interfaces that comprise the layers, a plethora of X-ray phase contrast fringes appear in the images, leading to many radiographic and tomographic artifacts which compromise the ability to infer the density of the layer. In this paper, we describe how we are attacking this problem with a variety of radiographic standards and through radiographic simulation using the HADES radiographic simulation code.

Original languageEnglish (US)
Pages (from-to)223-226
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume579
Issue number1
DOIs
StatePublished - Aug 21 2007

Keywords

  • Gradient density laser targets
  • Hades simulation code
  • Isentropic compression
  • Phase-contrast microscopy
  • Radiographic simulation
  • X-ray phase effects

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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