Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 83, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4731743
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Measuring the shape of implosions is critical to inertial confinement fusion experiments at the National Ignition Facility. We have developed techniques that have proven successful for extracting shape information from images of x-ray self-emission recorded by a variety of diagnostic instruments for both DT-filled targets and low-yield surrogates. These key results help determine optimal laser and target parameters leading to ignition. We have compensated for instrumental response and have employed a variety of image processing methods to remove artifacts from the images while retaining salient features. The implosion shape has been characterized by decomposing intensity contours into Fourier and Legendre modes for different lines of sight. We also describe procedures we have developed for estimating uncertainties in these measurements. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4731743]
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