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Title: The Shock/Shear platform for planar radiation-hydrodynamics experiments on the National Ignition Facility

Abstract

An indirectly-driven shock tube experiment fielded on the National Ignition Facility (NIF) was used to create a high-energy-density hydrodynamics platform at unprecedented scale. Scaling up a shear-induced mixing experiment previously fielded at OMEGA, the NIF shear platform drives 130 μm/ns shocks into a CH foam-filled shock tube (∼ 60 mg/cc) with interior dimensions of 1.5 mm diameter and 5 mm length. The pulse-shaping capabilities of the NIF are used to extend the drive for >10 ns, and the large interior tube volumes are used to isolate physics-altering edge effects from the region of interest. The scaling of the experiment to the NIF allows for considerable improvement in maximum driving time of hydrodynamics, in fidelity of physics under examination, and in diagnostic clarity. Details of the experimental platform and post-shot simulations used in the analysis of the platform-qualifying data are presented. Hydrodynamic scaling is used to compare shear data from OMEGA with that from NIF, suggesting a possible change in the dimensionality of the instability at late times from one platform to the other.

Authors:
; ; ; ; ; ; ; ; ; ;  [1]
  1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
22410399
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; ENERGY DENSITY; EXPERIMENTAL DATA; FOAMS; HYDRODYNAMICS; LENGTH; OMEGA FACILITY; PLASMA INSTABILITY; PULSE SHAPERS; SCALING; SHEAR; SHOCK TUBES; US NATIONAL IGNITION FACILITY

Citation Formats

Doss, F. W., E-mail: fdoss@lanl.gov, Kline, J. L., Flippo, K. A., Perry, T. S., DeVolder, B. G., Tregillis, I., Loomis, E. N., Merritt, E. C., Murphy, T. J., Welser-Sherrill, L., and Fincke, J. R. The Shock/Shear platform for planar radiation-hydrodynamics experiments on the National Ignition Facility. United States: N. p., 2015. Web. doi:10.1063/1.4918354.
Doss, F. W., E-mail: fdoss@lanl.gov, Kline, J. L., Flippo, K. A., Perry, T. S., DeVolder, B. G., Tregillis, I., Loomis, E. N., Merritt, E. C., Murphy, T. J., Welser-Sherrill, L., & Fincke, J. R. The Shock/Shear platform for planar radiation-hydrodynamics experiments on the National Ignition Facility. United States. doi:10.1063/1.4918354.
Doss, F. W., E-mail: fdoss@lanl.gov, Kline, J. L., Flippo, K. A., Perry, T. S., DeVolder, B. G., Tregillis, I., Loomis, E. N., Merritt, E. C., Murphy, T. J., Welser-Sherrill, L., and Fincke, J. R. Fri . "The Shock/Shear platform for planar radiation-hydrodynamics experiments on the National Ignition Facility". United States. doi:10.1063/1.4918354.
@article{osti_22410399,
title = {The Shock/Shear platform for planar radiation-hydrodynamics experiments on the National Ignition Facility},
author = {Doss, F. W., E-mail: fdoss@lanl.gov and Kline, J. L. and Flippo, K. A. and Perry, T. S. and DeVolder, B. G. and Tregillis, I. and Loomis, E. N. and Merritt, E. C. and Murphy, T. J. and Welser-Sherrill, L. and Fincke, J. R.},
abstractNote = {An indirectly-driven shock tube experiment fielded on the National Ignition Facility (NIF) was used to create a high-energy-density hydrodynamics platform at unprecedented scale. Scaling up a shear-induced mixing experiment previously fielded at OMEGA, the NIF shear platform drives 130 μm/ns shocks into a CH foam-filled shock tube (∼ 60 mg/cc) with interior dimensions of 1.5 mm diameter and 5 mm length. The pulse-shaping capabilities of the NIF are used to extend the drive for >10 ns, and the large interior tube volumes are used to isolate physics-altering edge effects from the region of interest. The scaling of the experiment to the NIF allows for considerable improvement in maximum driving time of hydrodynamics, in fidelity of physics under examination, and in diagnostic clarity. Details of the experimental platform and post-shot simulations used in the analysis of the platform-qualifying data are presented. Hydrodynamic scaling is used to compare shear data from OMEGA with that from NIF, suggesting a possible change in the dimensionality of the instability at late times from one platform to the other.},
doi = {10.1063/1.4918354},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}