Production and characterization of doped mandrels for inertial-confinement fusion experiments

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States)

DOI:https://doi.org/10.1116/1.579308· OSTI ID:7271762

Cook, R; Overturf, III, G E; Buckley, S R; McEachern, R ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

A key feature of current inertial-confinement fusion (ICF) experiments is the incorporation of dopant atoms into the thin polymer microshell which, in a finished ICF capsule, forms its inner wall. These dopants provide a spectroscopic signal during the implosion that can be used to diagnose the degree of mix at the capsule--fuel interface. The high-[ital Z] dopants can also be used to directly image the fuel--pusher interface. The current status of doped mandrel development is reviewed, with a focus on the mandrel surface smoothness. With the development of unique surface mapping characterization tools which will be described, it has been discovered that mandrel surface smoothness is a function of the polymers used to form the mandrels. In this report it will be shown that Cl-doped mandrels produced from a blend of polystyrene and poly([ital p]-chlorostyrene) are rough on a length scale of 10's of microns with amplitudes of as much as a 100 nm. The origin of this roughness will be discussed, and it will be shown that this roughness can be removed by using a copolymer rather than a blend of two polymers. Also it will be shown how Cr-doped mandrels become rough with age due to ambient light exposure.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7271762
• Journal Information: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States), Vol. 12:4; ISSN 0734-2101
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ICF DEVICES
THERMONUCLEAR FUELS
THERMONUCLEAR REACTIONS
DIAGNOSTIC TECHNIQUES
CHLORINE ADDITIONS
CHROMIUM ADDITIONS
DOPED MATERIALS
IMPLOSIONS
INTERFACES
POLYSTYRENE
ALLOYS
CHROMIUM ALLOYS
FUELS
MATERIALS
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYVINYLS
SYNTHESIS
SYNTHETIC MATERIALS
THERMONUCLEAR DEVICES
700411* - Inertial Confinement Devices- (1992-)