Publications

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Scaling of X pinches from 1 MA to 6 MA

Sinars, Daniel S.; McBride, Ryan D.; Wenger, D.F.; Cuneo, M.E.; Yu, Edmund Y.; Harding, Eric H.; Hansen, Stephanie B.; Ampleford, David A.; Jennings, Christopher A.

This final report for Project 117863 summarizes progress made toward understanding how X-pinch load designs scale to high currents. The X-pinch load geometry was conceived in 1982 as a method to study the formation and properties of bright x-ray spots in z-pinch plasmas. X-pinch plasmas driven by 0.2 MA currents were found to have source sizes of 1 micron, temperatures >1 keV, lifetimes of 10-100 ps, and densities >0.1 times solid density. These conditions are believed to result from the direct magnetic compression of matter. Physical models that capture the behavior of 0.2 MA X pinches predict more extreme parameters at currents >1 MA. This project developed load designs for up to 6 MA on the SATURN facility and attempted to measure the resulting plasma parameters. Source sizes of 5-8 microns were observed in some cases along with evidence for high temperatures (several keV) and short time durations (<500 ps).

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TYPE SAND Report YEAR 2010
OSTIDOI

Bright spots in 1 MA X pinches as a function of wire number and material

Proposed for publication in Physics of Plasmas.

Ampleford, David A.; Cuneo, M.E.; Wenger, D.F.

Bright, intense x-ray sources with extreme plasma parameters (micropinch plasmas) have previously been characterized at 0.1-0.4 MA, but the scaling of such sources at higher current is poorly understood. The x-ray source size and radiation power of 1 MA X pinches were studied as a function of wire material (Al, Ti, Mo, and W) and number (1-, 2-, 8-, 32-, and 64-wire configurations). The smallest bright spots observed were from 32-wire tungsten X pinches, which produced {le} 11-16 {micro}m, {approx}2 J, 1-10 GW sources of 3-5 keV radiation.

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TYPE Journal Article YEAR 2008
OSTI

Z-Beamlet: a multi-KJ TW-class laser for backlit x-radiography applications on the Z-Accelerator

Atherton, B.W.; Gonzales, Rita A.; Gurrieri, Thomas G.; Herrmann, Mark H.; Mulville, Thomas D.; Neely, Kelly A.; Rambo, Patrick K.; Rovang, Dean C.; Ruggles, Larry R.; Smith, Ian C.; Schwarz, Jens S.; Simpson, Walter W.; Sinars, Daniel S.; Speas, Christopher S.; Tafoya-Porras, Belinda T.; Wenger, D.F.; Young, Ralph W.; Adams, Richard G.; Bennett, Guy R.; Campbell, David V.; Carroll, Malcolm; Claus, Liam D.; Edens, Aaron E.; Geissel, Matthias G.

Abstract not provided.

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TYPE Conference YEAR 2007
OSTI

X-ray optics on the Z-Accelerator backlit with the Z-Beamlet Laser & Z-Petawatt Laser systems

Gonzales, Rita A.; Gurrieri, Thomas G.; Herrmann, Mark H.; Mulville, Thomas D.; Neely, Kelly A.; Rambo, Patrick K.; Rovang, Dean C.; Ruggles, Larry R.; Schwarz, Jens S.; Adams, Richard G.; Simpson, Walter W.; Sinars, Daniel S.; Smith, Ian C.; Speas, Christopher S.; Tafoya-Porras, Belinda T.; Wenger, D.F.; Young, Ralph W.; Edens, Aaron E.; Atherton, B.W.; Bennett, Guy R.; Campbell, David V.; Carroll, Malcolm; Claus, Liam D.; Geissel, Matthias G.

Abstract not provided.

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TYPE Conference YEAR 2007
OSTI

1- and 2-frame monochromatic x-ray imaging of NIF-like capsules on Z and future higher-energy higher-resolution 2- & 4-frame x-radiography plans for ZR

Bennett, Guy R.; Campbell, David V.; Claus, Liam D.; Foresi, James S.; Johnson, Drew J.; Jones, Michael J.; Keller, Keith L.; Leifeste, Gordon T.; McPherson, Leroy A.; Mulville, Thomas D.; Neely, Kelly A.; Sinars, Daniel S.; Herrmann, Mark H.; Rambo, Patrick K.; Rovang, Dean C.; Ruggles, Larry R.; Simpson, Walter W.; Speas, Christopher S.; Wenger, D.F.; Smith, Ian C.; Cuneo, M.E.; Adams, Richard G.; Atherton, B.W.; Barnard, Wilson J.; Beutler, David E.; Burr, Robert A.

Abstract not provided.

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TYPE Conference YEAR 2006
OSTI

Mass profile and instability growth measurements for 300-wire z-pinch implosions driven by 14-18, MA

Proposed for publication in Physical Review Letters.

Sinars, Daniel S.; Cuneo, M.E.; Yu, Edmund Y.; Bliss, David E.; Nash, Thomas J.; Deeney, Christopher D.; Mazarakis, Michael G.; Wenger, D.F.

We present the first comprehensive study of high wire-number, wire-array Z-pinch dynamics at 14-18 MA using x-ray backlighting and optical shadowgraphy diagnostics. The cylindrical arrays retain slowly expanding, dense wire cores at the initial position up to 60% of the total implosion time. Azimuthally correlated instabilities at the array edge appear during this stage which continue to grow in amplitude and wavelength after the start of bulk motion, resulting in measurable trailing mass that does not arrive on axis before peak x-ray emission.

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TYPE Journal Article YEAR 2004
OSTI

1- to 10-keV x-ray backlighting of annular wire arrays on the Sandia Z-machine using bent-crystal imaging techniques

Proceedings of SPIE - The International Society for Optical Engineering

Sinars, Daniel S.; Wenger, D.F.; Cuneo, M.E.; Bennett, Guy R.; Anderson, Jessica E.; Porter, John L.; Rambo, Patrick K.; Rovang, Dean C.; Smith, Ian C.

Annular wire array implosions on the Sandia Z-machine can produce >200 TW and 1-2 MJ of soft x rays in the 0.1-10 keV range. The x-ray flux and debris in this environment present significant challenges for radiographic diagnostics. X-ray backlighting diagnostics at 1865 and 6181 eV using spherically-bent crystals have been fielded on the Z-machine, each with a ~0.6 eV spectral bandpass, 10 μm spatial resolution, and a 4 mm by 20 mm field of view. The Z-Beamlet laser, a 2-TW, 2-kJ Nd:glass laser (λ=527 nm), is used to produce 0.1-1 J x-ray sources for radiography. The design, calibration, and performance of these diagnostics is presented.

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TYPE Conference YEAR 2004
ScopusOSTI

[Copy of characteristics and scaling of tungsten-wire-array z-pinch implosion dynamics at 20 MA.]

Proposed for publication in Physics of Plasmas.

Vesey, Roger A.; Yu, Edmund Y.; Nash, Thomas J.; Bliss, David E.; Bennett, Guy R.; Sinars, Daniel S.; Simpson, Walter W.; Ruggles, Larry R.; Wenger, D.F.; Garasi, Christopher J.; Aragon, Rafael A.; Fowler, William E.; Johnson, Drew J.; Keller, Keith L.; McGurn, John S.; Mehlhorn, Thomas A.; Speas, Christopher S.; Struve, Kenneth W.; Stygar, William A.; Chandler, Gordon A.

Abstract not provided.

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TYPE Journal Article YEAR 2004
OSTI

Z facility diagnostic system for high energy density physics at Sandia National Laboratories

Leeper, Ramon J.; Deeney, Christopher D.; Dunham, Gregory S.; Fehl, David L.; Franklin, James K.; Hawn, Rona E.; Hall, Clint A.; Hurst, Michael J.; Jinzo, Tanya D.; Jobe, Daniel O.; Leeper, Ramon J.; Joseph, Nathan R.; Knudson, Marcus D.; Lake, Patrick W.; Lazier, Steven E.; Lucas, J.; McGurn, John S.; Manicke, Matthew P.; Mock, Raymond M.; Moore, T.C.; Nash, Thomas J.; Bailey, James E.; Nelson, Alan J.; Nielsen, D.S.; Olson, Richard E.; Pyle, John H.; Rochau, G.A.; Ruggles, Larry R.; Ruiz, Carlos L.; Sanford, Thomas W.; Seamen, Johann F.; Bennett, Guy R.; Simpson, Walter W.; Sinars, Daniel S.; Speas, Christopher S.; Stygar, William A.; Wenger, D.F.; Seamen, Johann J.; Carlson, Alan L.; Chandler, Gordon A.; Cooper, Gary W.; Cuneo, M.E.

Abstract not provided.

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TYPE Conference YEAR 2003
OSTI
Results 1–25 of 27
Results 1–25 of 27