Overview of National Ignition Facility Capsule Metrology

Moreno, K. A.; Eddinger, S. A.; Fong, Joan; Lee, Y. T.; Nguyen, Anh Gia-Tuan; Nikroo, A.; Huang, H.; Rosano, R.; Xu, Hongwei

doi:10.13182/fst55-349

Cited by 20 publications

(5 citation statements)

References 24 publications

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“…We do not believe that these defects are based on the sputtering and subsequent incorporation of chamber wall material into the plasma polymer. High atomic number contaminants are detrimental to the performance of HED ablators and extensive X‐ray characterization of plasma polymer from this deposition system has not found such contaminants …”

Section: Resultsmentioning

confidence: 99%

Photo‐oxidation of Polymers Synthesized by Plasma and Initiated CVD

Baxamusa

Suresh

Ehrmann

et al. 2015

Chemical Vapor Deposition

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Plasma polymers are often limited by their susceptibility to spontaneous and photo-oxidation. We show that the unusual photoluminescence (PL) behavior of a plasma polymer of trans-2-butene is correlated with its PL strength. These photoprocesses occur under blue light illumination (l ¼ 405 nm), distinguishing them from traditional ultraviolet degradation of polymers. These photo-active defects are likely formed during the plasma deposition process, and we show that a polymer synthesized using initiated (i)CVD, a non-plasma method, has 1000Â lower PL signal and enhanced photo-stability. Nonplasma methods, such as iCVD, may therefore be a route to overcoming material aging issues that limit the adoption of plasma polymers.

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Section: Resultsmentioning

confidence: 99%

Photo‐oxidation of Polymers Synthesized by Plasma and Initiated CVD

Baxamusa

Suresh

Ehrmann

et al. 2015

Chemical Vapor Deposition

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“…Metrological aspects of the quality of target shells have been considered. 11 Technical problems of preparation of quality laser targets are described. 12 One of the methods for manufacturing metal shellscontainers is to deposit a thin layer of metal on a polymer shell-matrix, followed by thermal removal of the polymer.…”

Section: Introductionmentioning

confidence: 99%

“…These conditions are necessary for uniform compression and heating of the plasma to the critical parameters of the beginning of the fusion reaction. Metrological aspects of the quality of target shells have been considered 11 . Technical problems of preparation of quality laser targets are described 12 …”

Section: Introductionmentioning

confidence: 99%

Fabrication of hollow poly(alpha‐methylstyrene) shells for inertial confinement fusion targets

Пастухов

Pervakov

Akunets

et al. 2022

J of Applied Polymer Sci

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One of the important technical problems of Inertial Confinement Fusion is the development of a technology for obtaining large batches of targets‐containers for hydrogen isotopes. At the first stage of production of targets, spherical polymer shell‐matrices are used. In this work, for the first time, a method is proposed for obtaining batches of spherical shells from high molecular mass poly(alpha‐methylstyrene) using the developed set of equipment. To obtain batches of shells with a high degree of sphericity 0.992–0.997, the optimal conditions for their production and the composition of the equipment complex were determined. The surface quality of the shells and the uniformity of their walls were determined by electron microscopy. To estimate the degree of sphericity of polymeric shells, statistical calculations of data obtained by photo‐registering of different batches of shells were performed. Batches of spherical shells 2.1 ± 0.05 mm in size were obtained.

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“…With the progress in capsule fabrication techniques and the increasing requirements for capsule precise characterization in ICF experiments, several surface analysis methods have been developed since 1999 [5][6][7] . Some of them are not adequate.…”

Section: Introductionmentioning

confidence: 99%

Surface characterization of ICF capsule by AFM-based profilometer

Meng

Zhao

Tang

et al. 2017

High Pow Laser Sci Eng

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Outside surface fluctuations of inertial confinement fusion (ICF) capsule greatly affect the implosion performance. An atomic force microscope (AFM)-based profilometer is developed to precisely characterize the capsule surface with nanometer resolution. With the standard nine surface profiles and the complete coverage data, 1D and 2D power spectra are obtained to quantitatively qualify the capsule. Capsule center fast aligning, orbit traces automatic recording, 3D capsule orientation have been studied to improve the accuracy and efficiency of the profilometer.

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Overview of National Ignition Facility Capsule Metrology

Cited by 20 publications

References 24 publications

Photo‐oxidation of Polymers Synthesized by Plasma and Initiated CVD

Photo‐oxidation of Polymers Synthesized by Plasma and Initiated CVD

Fabrication of hollow poly(alpha‐methylstyrene) shells for inertial confinement fusion targets

Surface characterization of ICF capsule by AFM-based profilometer

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