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Tumble Polishing of Faster-Coated Glow Discharge Polymer Capsules

N. G. Rice, K. C. Chen, D. E. Hoover, A. M. Garcia, A. Nikroo, N. Dorsano

Fusion Science and Technology / Volume 70 / Number 2 / August-September 2016 / Pages 137-140

Technical Paper /

First Online Publication:June 30, 2016
Updated:August 9, 2016

CH capsules fabricated by glow discharge plasma polymerization have been used as the capsule point design for the National Ignition Facility (NIF). The coating time ranges from 6 to 8 weeks. We have reduced the fabrication time by improving the coating rate. The faster coating rate results in an increased surface roughness in high-spatial-frequency modes >100. We employed the tumble finishing process developed for NIF capsules to improve the high mode roughness. Material properties such as surface finish, density, and relative oxygen uptake rate were examined for the faster-coated plastic. The reduction of glow discharge polymer (GDP) capsule production time without significant deviation from benchmarked capsule properties is discussed.

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