A knock-on deuteron imager for measurements of fuel and hotspot asymmetry in direct-drive inertial confinement fusion implosions (invited)
Rattachement africain : us. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
A knock-on deuteron imager (KoDI) has been implemented to measure the fuel and hotspot asymmetry of cryogenic inertial confinement fusion implosions on OMEGA. Energetic neutrons produced by D–T fusion elastically scatter (“knock on”) deuterons from the fuel layer with a probability that depends on ρR. Deuterons above 10 MeV are produced by near-forward scattering, and imaging them is equivalent to time-integrated neutron imaging of the hotspot. Deuterons below 6 MeV are produced by a combination of side scattering and ranging in the fuel, and encode information about the spatial distribution of the dense fuel. The KoDI instrument consists of a multi-penumbral aperture positioned 10–20 cm from the implosion using a ten-inch manipulator and a detector pack at 350 cm from the implosion to record penumbral images with magnification of up to 35×. Range filters and the intrinsic properties of CR-39 are used to distinguish different charged-particle images by energy along the same line of sight. Image plates fielded behind the CR-39 record a 10 keV x-ray image using the same aperture. A maximum-likelihood reconstruction algorithm has been implemented to infer the source from the projected penumbral images. The effects of scattering and aperture charging on the instrument point-spread function are assessed. Synthetic data are used to validate the reconstruction algorithm and assess an appropriate termination criterion. Significant aperture charging has been observed in the initial experimental dataset, and increases with aperture distance from the implosion, consistent with a simple model of charging by laser-driven EMP.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- A knock-on deuteron imager for measurements of fuel and hotspot asymmetry in direct-drive inertial confinement fusion implosions (invited)
- Date Crossref
- 01/09/2022
- Éditeur
- AIP Publishing
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Energetics (United States) pays non établi dans la noticeEntreprise
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Laboratory for Laser Energetics pays non établi dans la noticeStructure de recherche
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University of Rochester Laboratory for Laser Energetics pays non établi dans la noticeUniversité ou école supérieure
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Plasma Technology (United States) pays non établi dans la noticeEntreprise
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Fusion Academy pays non établi dans la noticeUniversité ou école supérieure
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Massachusetts Institute of Technology Plasma Science and Fusion Center pays non établi dans la noticeUniversité ou école supérieure
Energetics (United States), Laboratory for Laser Energetics et Laboratory for Laser Energetics — University of Rochester, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.