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5 results on '"R. B. Randolph"'

1. Observation of persistent species temperature separation in inertial confinement fusion mixtures

Author

Brian M. Haines, R. C. Shah, J. M. Smidt, B. J. Albright, T. Cardenas, M. R. Douglas, C. Forrest, V. Yu Glebov, M. A. Gunderson, C. E. Hamilton, K. C. Henderson, Y. Kim, M. N. Lee, T. J. Murphy, J. A. Oertel, R. E. Olson, B. M. Patterson, R. B. Randolph, and D. W. Schmidt

Subjects
Science
Abstract

The influence of contaminants is one of the factors hindering self-sustained thermonuclear burn in inertial confinement fusion. Here, the authors present evidence, through simulations and experiments, that contaminants do not fully reach thermal equilibrium, and thus their amount is usually underestimated.

Published
2020
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2. Experimental quantification of the impact of heterogeneous mix on thermonuclear burn

Author

B. J. Albright, T. J. Murphy, B. M. Haines, M. R. Douglas, J. H. Cooley, T. H. Day, N. A. Denissen, C. Di Stefano, P. Donovan, S. L. Edwards, J. Fincke, L. M. Green, L. Goodwin, R. A. Gore, M. A. Gunderson, J. R. Haack, C. E. Hamilton, E. P. Hartouni, N. V. Kabadi, S. Khan, P. M. Kozlowski, Y. Kim, M. N. Lee, R. Lester, T. Morrow, J. A. Oertel, R. E. Olson, B. M. Patterson, T. Quintana, R. B. Randolph, D. W. Schmidt, R. C. Shah, J. M. Smidt, A. Strickland, C. Wilson, and L. Yin

Subjects
Condensed Matter Physics
Published
2022
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4. Improvements in ICF target fabrication through high precision assembly and nondestructive characterization

Author

D Honnell, R D Day, A C Valdez, K A D Obrey, D Hatch, F P Garcia, Derek Schmidt, R Perea, B M Patterson, R B Randolph, and D Capelli

Subjects
History, Accuracy and precision, Engineering, Fabrication, business.industry, Mechanical engineering, Computer Science Applications, Education, Characterization (materials science), Metrology, Machining, Component (UML), Systems engineering, business
Abstract

Current ICF and HED targets are fielded on Omega, Z, and Trident; future campaigns will also be fielded on NIF. NIF will field less than 2 shots per day. With such few experiments, target fabrication and alignment accuracy, enhanced metrology and advanced component machining will be even more important. Future target designs are also becoming more complex and more stringent in terms of both manufacturing accuracy and precision. Several steps have been taken to improve the fabrication and characterization of targets, such as instituting an automated assembly station with 3 μm tolerances, utilizing non-destructive characterization tools for rapid component metrology and target assembly, and advancing machining capabilities. Recapitalization of target fabrication infrastructure is continuous.

Published
2010
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