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Title: Controlling Rayleigh-Taylor Instabilities in Magnetically Driven Solid Metal Shells by Means of a Dynamic Screw Pinch

Abstract

Magnetically driven implosions of solid metal shells are an effective vehicle to compress materials to extreme pressures and densities. Rayleigh-Taylor instabilities (RTI) are ubiquitous, yet typically undesired features in all such experiments where solid materials are rapidly accelerated to high velocities. In cylindrical shells (“liners”), the magnetic field driving the implosion can exacerbate the RTI. Here, we suggest an approach to implode solid metal liners enabling a remarkable reduction in the growth of magnetized RTI (MRTI) by employing a magnetic drive with a tilted, dynamic polarization, forming a dynamic screw pinch. Our calculations, based on a self-consistent analytic framework, demonstrate that the cumulative growth of the most deleterious MRTI modes may be reduced by as much as 1 to 2 orders of magnitude. One key application of this technique is to generate increasingly stable, higher-performance implosions of solid metal liners to achieve fusion [M. R. Gomez et al., Phys. Rev. Lett. 113, 155003 (2014)]. Finally, we weigh the potentially dramatic benefits of the solid liner dynamic screw pinch against the experimental tradeoffs required to achieve the desired drive field history and identify promising designs for future experimental and computational studies.

Authors:
 [1];  [2];  [3];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Naval Research Lab. (NRL), Washington, DC (United States). Plasma Physics Division
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Michigan, Ann Arbor, MI (United States). Nuclear Engineering and Radiological Sciences
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1332916
Alternate Identifier(s):
OSTI ID: 1331831
Report Number(s):
SAND2016-10869J
Journal ID: ISSN 0031-9007; PRLTAO; 648656; TRN: US1700122
Grant/Contract Number:  
AC04-94AL85000; 165746
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 20; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Schmit, P. F., Velikovich, A. L., McBride, R. D., and Robertson, G. K. Controlling Rayleigh-Taylor Instabilities in Magnetically Driven Solid Metal Shells by Means of a Dynamic Screw Pinch. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.117.205001.
Schmit, P. F., Velikovich, A. L., McBride, R. D., & Robertson, G. K. Controlling Rayleigh-Taylor Instabilities in Magnetically Driven Solid Metal Shells by Means of a Dynamic Screw Pinch. United States. doi:10.1103/PhysRevLett.117.205001.
Schmit, P. F., Velikovich, A. L., McBride, R. D., and Robertson, G. K. Fri . "Controlling Rayleigh-Taylor Instabilities in Magnetically Driven Solid Metal Shells by Means of a Dynamic Screw Pinch". United States. doi:10.1103/PhysRevLett.117.205001. https://www.osti.gov/servlets/purl/1332916.
@article{osti_1332916,
title = {Controlling Rayleigh-Taylor Instabilities in Magnetically Driven Solid Metal Shells by Means of a Dynamic Screw Pinch},
author = {Schmit, P. F. and Velikovich, A. L. and McBride, R. D. and Robertson, G. K.},
abstractNote = {Magnetically driven implosions of solid metal shells are an effective vehicle to compress materials to extreme pressures and densities. Rayleigh-Taylor instabilities (RTI) are ubiquitous, yet typically undesired features in all such experiments where solid materials are rapidly accelerated to high velocities. In cylindrical shells (“liners”), the magnetic field driving the implosion can exacerbate the RTI. Here, we suggest an approach to implode solid metal liners enabling a remarkable reduction in the growth of magnetized RTI (MRTI) by employing a magnetic drive with a tilted, dynamic polarization, forming a dynamic screw pinch. Our calculations, based on a self-consistent analytic framework, demonstrate that the cumulative growth of the most deleterious MRTI modes may be reduced by as much as 1 to 2 orders of magnitude. One key application of this technique is to generate increasingly stable, higher-performance implosions of solid metal liners to achieve fusion [M. R. Gomez et al., Phys. Rev. Lett. 113, 155003 (2014)]. Finally, we weigh the potentially dramatic benefits of the solid liner dynamic screw pinch against the experimental tradeoffs required to achieve the desired drive field history and identify promising designs for future experimental and computational studies.},
doi = {10.1103/PhysRevLett.117.205001},
journal = {Physical Review Letters},
number = 20,
volume = 117,
place = {United States},
year = {Fri Nov 11 00:00:00 EST 2016},
month = {Fri Nov 11 00:00:00 EST 2016}
}

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Works referenced in this record:

Steady-state modeling of current loss in a post-hole convolute driven by high power magnetically insulated transmission lines
journal, December 2013

  • Madrid, E. A.; Rose, D. V.; Welch, D. R.
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Direct-drive laser fusion: Status and prospects
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