skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Stability of Magnetically Implode Liners for High Energy Density Experiments

Abstract

Magnetically imploded cylindrical metal shells (z-pinch liners) are attractive drivers for a wide variety of hydrodynamics and material properties experiments. The ultimate utility of liners depends on the acceleration of near-solid density shells to velocities exceeding 20 km/sec with good azimuthal symmetry and axial uniformity. Two pulse power systems (Ranchero and Atlas) currently operational or under development at Los Alamos provide electrical energy adequate to accelerate {approximately}50 gr. liners to 1-2 MJ/cm kinetic energy. As in all z-pinches, the outer surface of a magnetically imploded liner is unstable to magneto-Rayleigh-Taylor (RT) modes during acceleration. Large-scale distortion in the liners from RT modes growing from glide plane interactions or initial imperfections could make liners unusable for man experiments. On the other hand, material strength in the liner should, from first principles, reduce the growth rate of RT modes - and can render some combinations of wavelength and amplitude analytically stable. The growth of instabilities in both soft aluminum liners and in high strength aluminum alloy liners has been studied analytically, computationally and experimentally at liner kinetic energies up to 100 KJ/cm on the Pegasus capacitor bank using driving currents up to 12 MA.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
759427
Report Number(s):
LA-UR-98-4624
TRN: US0004348
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Megagauss VIII, Tallahassee, FL (US), 10/18/1998--10/23/1998; Other Information: PBD: 18 Oct 1998
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; LINEAR Z PINCH DEVICES; IMPLOSIONS; LINERS; HYDRODYNAMICS; MATERIALS TESTING; RAYLEIGH-TAYLOR INSTABILITY; ALUMINIUM ALLOYS; ALUMINIUM

Citation Formats

Reinovsky, R E, Anderson, W E, Atchison, W L, Bartsch, R R, Clark, D A, Ekdahl, C E, Faehl, R J, Goforth, J H, Keinigs, R K, Lindemuth, I R, Morgan, D, Rodriguez, G, Tasker, D G, Trainor, R J, and Shlachter, J S. Stability of Magnetically Implode Liners for High Energy Density Experiments. United States: N. p., 1998. Web.
Reinovsky, R E, Anderson, W E, Atchison, W L, Bartsch, R R, Clark, D A, Ekdahl, C E, Faehl, R J, Goforth, J H, Keinigs, R K, Lindemuth, I R, Morgan, D, Rodriguez, G, Tasker, D G, Trainor, R J, & Shlachter, J S. Stability of Magnetically Implode Liners for High Energy Density Experiments. United States.
Reinovsky, R E, Anderson, W E, Atchison, W L, Bartsch, R R, Clark, D A, Ekdahl, C E, Faehl, R J, Goforth, J H, Keinigs, R K, Lindemuth, I R, Morgan, D, Rodriguez, G, Tasker, D G, Trainor, R J, and Shlachter, J S. Sun . "Stability of Magnetically Implode Liners for High Energy Density Experiments". United States. https://www.osti.gov/servlets/purl/759427.
@article{osti_759427,
title = {Stability of Magnetically Implode Liners for High Energy Density Experiments},
author = {Reinovsky, R E and Anderson, W E and Atchison, W L and Bartsch, R R and Clark, D A and Ekdahl, C E and Faehl, R J and Goforth, J H and Keinigs, R K and Lindemuth, I R and Morgan, D and Rodriguez, G and Tasker, D G and Trainor, R J and Shlachter, J S},
abstractNote = {Magnetically imploded cylindrical metal shells (z-pinch liners) are attractive drivers for a wide variety of hydrodynamics and material properties experiments. The ultimate utility of liners depends on the acceleration of near-solid density shells to velocities exceeding 20 km/sec with good azimuthal symmetry and axial uniformity. Two pulse power systems (Ranchero and Atlas) currently operational or under development at Los Alamos provide electrical energy adequate to accelerate {approximately}50 gr. liners to 1-2 MJ/cm kinetic energy. As in all z-pinches, the outer surface of a magnetically imploded liner is unstable to magneto-Rayleigh-Taylor (RT) modes during acceleration. Large-scale distortion in the liners from RT modes growing from glide plane interactions or initial imperfections could make liners unusable for man experiments. On the other hand, material strength in the liner should, from first principles, reduce the growth rate of RT modes - and can render some combinations of wavelength and amplitude analytically stable. The growth of instabilities in both soft aluminum liners and in high strength aluminum alloy liners has been studied analytically, computationally and experimentally at liner kinetic energies up to 100 KJ/cm on the Pegasus capacitor bank using driving currents up to 12 MA.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {10}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: