Target Development for the National Ignition Campaign

Hamza, A. V.; Nikroo, A.; Alger, E T; Antipa, Nick; Atherton, L. J.; Barker, D. A.; Baxamusa, Salmaan H.; Bhandarkar, S. D.; Biesiada, Thomas A.; Buice, E S; Carr, Emily; Castro, C.; Choate, C.; Conder, A.; Crippen, J. W.; Dylla‐Spears, Rebecca; Dzenitis, E. G.; Eddinger, S. A.; Emerich, M.; Fair, J.; Farrell, Michael; Felker, S.; Florio, J.; Forsman, A.; Giraldez, E.; Hein, N.; Hoover, D.; Horner, J.; Huang, H.; Kozioziemski, B.; Kroll, J. J.; Lawson, B.R.; Letts, Stephan A.; Lord, D. M.; Mapoles, E. R.; Mauldin, M.; Miller, Phil; Montesanti, R C; Moreno, K. A.; Parham, T; Nathan, B. R.; Reynolds, John G.; Sater, J.; Segraves, K.; Seugling, R M; Stadermann, Michael; Strauser, R. J.; Stephens, R. B.; Suratwala, Tayyab; Swisher, M.; Taylor, John S.; Wallace, R. J.; Wegner, Paul J.; Wilkens, H. L.; Yoxall, B.

doi:10.13182/fst15-163

Cited by 29 publications

(12 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The perturbation transfer from the ablator to the substrate is demonstrated to happen from the very first moments of the interaction within the TEP phase. Further investigations are in progress to study the transfer efficiency of these perturbations from the ablator to the substrate for direct-drive target designs [48,49]. In particular, plastic (polystyrene CH) [50] and Beryllium [51] ablators on ice DD substrates are being examined in spherical geometry including the use of thin Au overcoatings with different thicknesses.…”

Section: Resultsmentioning

confidence: 99%

The importance of the laser pulse-ablator interaction dynamics prior to the ablation plasma phase in inertial confinement fusion studies

Kaselouris

Fitilis

Skoulakis

et al. 2020

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

This work presents studies which demonstrate the importance of the very early heating dynamics of the ablator long before the ablation plasma phase begins in laser driven inertial confinement fusion (ICF) studies. For the direct-drive fusion concept using lasers, the development of perturbations during the thermo-elasto-plastic (TEP) and melting phases of the interaction of the laser pulse with the ablator's surface may act as seeding to the subsequent growth of hydro-dynamic instabilities apparent during the acceleration phase of the interaction such as for instance the Rayleigh–Taylor and the Richtmyer–Meshkov, which strongly affect the implosion dynamics of the compression phase. The multiphysics-multiphase finite-element method (FEM) simulation results are experimentally validated by advanced three-dimensional whole-field dynamic imaging of the surface of the ablator allowing for a transverse to the surface spatial resolution of only approximately 1 nm. The study shows that the TEP and melting phases of the interaction are of crucial importance since transverse perturbations of the ablator's surface can reach tens of nanometres in amplitude within the TEP and melting phases. Such perturbations are of Rayleigh type and are transferred from the ablator to the substrate from the very first moments of the interaction. This article is part of a discussion meeting issue ‘Prospects for high gain inertial fusion energy (part 1)’.

show abstract

Section: Resultsmentioning

confidence: 99%

The importance of the laser pulse-ablator interaction dynamics prior to the ablation plasma phase in inertial confinement fusion studies

Kaselouris

Fitilis

Skoulakis

et al. 2020

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

show abstract

“…It could be seen from Figure 5 that the density matching relationship between the compound droplets and the W2 phase during the solidifying process. The density difference between the PS compound droplets and the W2 phase during solidifying changed from À0.0036 to À0.0018 g/cm 3 . The density difference between the PAMS compound droplets and the W2 phase during solidifying changed from À0.0023 to À0.0001 g/cm 3 .…”

Section: Effect Of Polymer Molecular Structure On the Sphericity Of M...mentioning

confidence: 99%

“…[1,2] One of the most promising ways to achieve controlled use of fusion energy is laser inertial confinement fusion, which would promise an inexhaustible source of energy. [3][4][5][6] Polymer hollow microspheres can be used as the fuel containers in ICF physical experiments due to their low density, low mass, good thermal insulation, and high specific surface area. [7][8][9][10] With the development of ICF physical experiments, the requirement for thin-walled polymer microspheres is presented.…”

Section: Introductionmentioning

confidence: 99%

Effect of polymer molecular structure on the quality of thin‐walled hollow microspheres for inertial confinement fusion

Zhu

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

Polymer microspheres can be used as fuel containers for laser inertial confinement fusion (ICF) due to their low atomic number, low density, and high thermal stability. The thin-walled polymer microspheres are prone to cracking due to an increase in the diameter to thickness ratio (diameter/wall thickness).The effect of polystyrene (PS) and Poly (α-methyl styrene) (PAMS) materials commonly used in ICF experiments on the quality of thin-walled microspheres is investigated. PS hollow microspheres show better sphericity, smoother surface, and lower cracking rate than PAMS microspheres. Moreover, the heat treatment of solidified PS microspheres can improve the strength so that the cracking rate of the microspheres decreases. The relative mechanism of how the molecular structure affect the quality is also discussed. This study provides some guidance for the preparation of thin-walled polymer microspheres with high quality for ICF experiments.

show abstract

“…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. At the first stage, it is necessary to obtain thinwalled polymer shells with a high degree of sphericity and a defect-free surface.…”

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

View full text Add to dashboard Cite

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.

show abstract

Target Development for the National Ignition Campaign

Cited by 29 publications

References 26 publications

The importance of the laser pulse-ablator interaction dynamics prior to the ablation plasma phase in inertial confinement fusion studies

The importance of the laser pulse-ablator interaction dynamics prior to the ablation plasma phase in inertial confinement fusion studies

Effect of polymer molecular structure on the quality of thin‐walled hollow microspheres for inertial confinement fusion

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

Contact Info

Product

Resources

About