TY - JOUR
T1 - Analysis and modeling of phase contrast radiography of gradient density laser targets
AU - Aufderheide, Maurice B.
AU - Brown, William D.
AU - Hamza, Alex V.
AU - Park, Hye Sook
AU - Martz, Harry E.
AU - Remington, Bruce A.
AU - Rogers, John A.
AU - Jeon, Saekwoo
AU - Nam, Yun Suk
N1 - Funding Information:
This work was performed under the auspices of the US Department of Energy by University of California, Lawrence Livermore National Laboratory under Contract W-7405-Eng-48.
PY - 2007/8/21
Y1 - 2007/8/21
N2 - 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.
AB - 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.
KW - Gradient density laser targets
KW - Hades simulation code
KW - Isentropic compression
KW - Phase-contrast microscopy
KW - Radiographic simulation
KW - X-ray phase effects
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U2 - 10.1016/j.nima.2007.04.044
DO - 10.1016/j.nima.2007.04.044
M3 - Article
AN - SCOPUS:34547665535
SN - 0168-9002
VL - 579
SP - 223
EP - 226
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1
ER -