Dissertation/Thesis Abstract

Moment-Based Accelerators for Kinetic Problems with Application to Inertial Confinement Fusion
by Taitano, William Tsubasa-Tsutsui, Ph.D., The University of New Mexico, 2014, 280; 3630377
Abstract (Summary)

In inertial confinement fusion (ICF), the kinetic ion and charge separation field effects may play a significant role in the difference between the measured neutron yield in experiments and the predicted yield from fluid codes. Two distinct of approaches exists in modeling plasma physics phenomena: fluid and kinetic approaches. While the fluid approach is computationally less expensive, robust closures are difficult to obtain for a wide separation in temperature and density. While the kinetic approach is a closed system, it resolves the full 6D phase space and classic explicit numerical schemes restrict both the spatial and time-step size to a point where the method becomes intractable. Classic implicit system require the storage and inversion of a very large linear system which also becomes intractable. This dissertation will develop a new implicit method based on an emerging moment-based accelerator which allows one to step over stiff kinetic time-scales. The new method converges the solution per time-step stably and efficiently compared to a standard Picard iteration. This new algorithm will be used to investigate mixing in Omega ICF fuel-pusher interface at early time of the implosion process, fully kinetically.

Indexing (document details)
Advisor: Prinja, Anil K., Knoll, Dana A.
Commitee: Oliveira, Cassiano R.E., Sulsky, Deborah
School: The University of New Mexico
Department: Nuclear Engineering
School Location: United States -- New Mexico
Source: DAI-B 75/11(E), Dissertation Abstracts International
Source Type: DISSERTATION
Subjects: Applied Mathematics, Nuclear engineering, Plasma physics
Keywords: HOLO, Inertial confinement fusion, Mix, Moment based acceleration, Plasma physics
Publication Number: 3630377
ISBN: 9781321082210
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