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Measurements of Magneto-Rayleigh-Taylor instability growth in initially solid liners on the Z facility

Sinars, Daniel S.; Edens, Aaron E.; Lopez, Mike R.; Smith, Ian C.; Slutz, Stephen A.; Shores, Jonathon S.; Bennett, Guy R.; Atherton, B.W.; Savage, Mark E.; Stygar, William A.; Leifeste, Gordon T.; Herrmann, Mark H.; Cuneo, M.E.; Peterson, Kyle J.; McBride, Ryan D.; Jennings, Christopher A.; Vesey, Roger A.; Nakhleh, Charles N.

Abstract not provided.

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TYPE Conference YEAR 2011
OSTI

Beryllium liner z-pinches for Magneto-Rayleigh--Taylor studies on Z

McBride, Ryan D.; Slutz, Stephen A.; Jennings, Christopher A.; Sinars, Daniel S.; Lemke, Raymond W.; Martin, Matthew; Vesey, Roger A.; Cuneo, M.E.; Herrmann, Mark H.

Magnetic Liner Inertial Fusion (MagLIF) [S. A. Slutz, et al., Phys. Plasmas 17 056303 (2010)] is a promising new concept for achieving >100 kJ of fusion yield on Z. The greatest threat to this concept is the Magneto-Rayleigh-Taylor (MRT) instability. Thus an experimental campaign has been initiated to study MRT growth in fast-imploding (<100 ns) cylindrical liners. The first sets of experiments studied aluminum liner implosions with prescribed sinusoidal perturbations (see talk by D. Sinars). By contrast, this poster presents results from the latest sets of experiments that used unperturbed beryllium (Be) liners. The purpose for using Be is that we are able to radiograph 'through' the liner using the 6-keV photons produced by the Z-Beamlet backlighting system. This has enabled us to obtain time-resolved measurements of the imploding liner's density as a function of both axial and radial location throughout the field of view. This data is allowing us to evaluate the integrity of the inside (fuel-confining) surface of the imploding liner as it approaches stagnation.

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TYPE Conference YEAR 2010
OSTI

Measurements of magneto-Rayleigh-Taylor instability growth during the implosion of initially solid metal liners

Physics of Plasmas

Sinars, Daniel S.; Edens, Aaron E.; Lopez, Mike R.; Smith, Ian C.; Shores, Jonathon S.; Slutz, Stephen A.; Bennett, Guy R.; Atherton, B.W.; Savage, Mark E.; Stygar, William A.; Leifeste, Gordon T.; Herrmann, Mark H.; McBride, Ryan D.; Cuneo, M.E.; Jennings, Christopher A.; Peterson, Kyle J.; Vesey, Roger A.; Nakhleh, Charles N.

Abstract not provided.

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TYPE Journal Article YEAR 2010
OSTI

The evolution of instabilities during magnetically driven liner implosions

Slutz, Stephen A.; Sinars, Daniel S.; McBride, Ryan D.; Jennings, Christopher A.; Herrmann, Mark H.; Cuneo, M.E.

Numerical simulations [S.A. Slutz et al Phys. Plasmas 17, 056303 (2010)] indicate that fuel magnetization and preheat could enable cylindrical liner implosions to become an efficient means to generate fusion conditions. A series of simulations has been performed to study the stability of magnetically driven liner implosions. These simulations exhibit the initial growth and saturation of an electro-thermal instability. The Rayleigh-Taylor instability further amplifies the resultant density perturbations developing a spectrum of modes initially peaked at short wavelengths. With time the spectrum of modes evolves towards longer wavelengths developing an inverse cascade. The effects of mode coupling, the radial dependence of the magnetic pressure, and the initial surface roughness will be discussed.

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TYPE Conference YEAR 2010
OSTI
Results 226–250 of 326
Results 226–250 of 326