Understanding the Critical Parameters of the PAMS Mandrel Fabrication Process
Abstract
As a part of an effort to continually better the roundness and roughness of ablator capsules, we looked at improving the same for the poly(alphamethylstyrene) or PAMS mandrels used to make the plastic capsules. The importance of this work is based on the fact that the surface properties of the mandrels set the lower limit for the ultimate attributes of the ablator capsule. These mandrels are made using an elegant double-emulsion process that uses the isotropic forces brought about by hydrostatic pressure and interfacial tension to seek sphericity. This paper describes the reasoning that led to investigating the so-called curing process where a solid PAMS shell is generated from a solution phase for achieving this goal. Using modeling to account for the mass transfer of the fluorobenzene solvent phase, we demonstrate that it is the control of the conditions through the percolation point of the system that leads to better mandrels. These concepts were implemented into the fabrication process to demonstrate significant improvements of the roundness of the mandrels.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1343051
- Report Number(s):
- LLNL-JRNL-677215
Journal ID: ISSN 1536-1055; TRN: US1701802
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Fusion Science and Technology
- Additional Journal Information:
- Journal Volume: 70; Journal Issue: 2; Journal ID: ISSN 1536-1055
- Publisher:
- American Nuclear Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 42 ENGINEERING
Citation Formats
Bhandarkar, Suhas, Paguio, Reny, Elsner, Fred, and Hoover, Denise. Understanding the Critical Parameters of the PAMS Mandrel Fabrication Process. United States: N. p., 2016.
Web. doi:10.13182/FST15-245.
Bhandarkar, Suhas, Paguio, Reny, Elsner, Fred, & Hoover, Denise. Understanding the Critical Parameters of the PAMS Mandrel Fabrication Process. United States. https://doi.org/10.13182/FST15-245
Bhandarkar, Suhas, Paguio, Reny, Elsner, Fred, and Hoover, Denise. Tue .
"Understanding the Critical Parameters of the PAMS Mandrel Fabrication Process". United States. https://doi.org/10.13182/FST15-245. https://www.osti.gov/servlets/purl/1343051.
@article{osti_1343051,
title = {Understanding the Critical Parameters of the PAMS Mandrel Fabrication Process},
author = {Bhandarkar, Suhas and Paguio, Reny and Elsner, Fred and Hoover, Denise},
abstractNote = {As a part of an effort to continually better the roundness and roughness of ablator capsules, we looked at improving the same for the poly(alphamethylstyrene) or PAMS mandrels used to make the plastic capsules. The importance of this work is based on the fact that the surface properties of the mandrels set the lower limit for the ultimate attributes of the ablator capsule. These mandrels are made using an elegant double-emulsion process that uses the isotropic forces brought about by hydrostatic pressure and interfacial tension to seek sphericity. This paper describes the reasoning that led to investigating the so-called curing process where a solid PAMS shell is generated from a solution phase for achieving this goal. Using modeling to account for the mass transfer of the fluorobenzene solvent phase, we demonstrate that it is the control of the conditions through the percolation point of the system that leads to better mandrels. These concepts were implemented into the fabrication process to demonstrate significant improvements of the roundness of the mandrels.},
doi = {10.13182/FST15-245},
journal = {Fusion Science and Technology},
number = 2,
volume = 70,
place = {United States},
year = {Tue Jul 05 00:00:00 EDT 2016},
month = {Tue Jul 05 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Influence of fluorobenzene mass transfer on the qualities of poly-α-methylstyrene shells
journal, January 2018
- Qiang, Chen; Sufen, Chen; Meifang, Liu
- RSC Advances, Vol. 8, Issue 7