Supercooling of Hydrogen on Template Materials to Deterministically Seed Ignition-Quality Solid Fuel Layers. (1st September 2016)

• Record Type: Journal Article
• Authors: Shin, S. J.; Zepeda-Ruiz, L. A.; Lee, J. R. I.; Baxamusa, S. H.; Dylla-Spears, R.; Suratwala, T.; Kozioziemski, B. J.
• Is Part Of: Fusion science and technology. Volume 70:Number 2(2016)
• Page Start: 184
• Page End: 190
• Publication Date: 2016-09-01
• Subjects: Fusion reactors -- Periodicals; Nuclear fusion -- Periodicals; Fusion reactors; Nuclear fusion; Periodicals; 621.48405
• DOI: 10.13182/FST15-212
• Languages: English
• ISSNs: 1536-1055

Abstract

Abstract: We explored templating effects of various materials for hydrogen (H2 and D2 ) solidification by measuring the degree of supercooling required for liquid hydrogen to solidify below each triple point. The results show high supercooling (>100 mK) for most metallic, covalent, and ionic solids, and low supercooling (<100 mK) for van der Waals (vdW) solids. We attribute the low supercooling of vdW solids to the weak interaction of the substrate and hydrogen. Highly ordered pyrolytic graphite showed the lowest supercooling among materials that are solid at room temperature, but did not exhibit a templating effect within a fill-tube and capsule assembly.