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Stagnation performance scaling of Magnetized Liner Inertial Fusion

Gomez, Matthew R.; Yager-Elorriaga, David A.; Myers, Clayton; Slutz, Stephen A.; Weis, Matthew R.; Jennings, Christopher A.; Lamppa, Derek C.; Harvey-Thompson, Adam J.; Geissel, Matthias; Knapp, P.F.; Harding, Eric H.; Hansen, Stephanie B.; Mangan, Michael A.; Ruiz, Carlos L.; Chandler, Gordon A.; Webb, Timothy J.; Moore, Thomas; Laity, George R.; Ampleford, David J.; Peterson, K.J.; Rochau, G.A.; Sinars, Daniel

Abstract not provided.

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TYPE Conference Poster YEAR 2019
OSTI

Stagnation Performance Scaling of Magnetized Liner Inertial Fusion

Gomez, Matthew R.; Yager-Elorriaga, David A.; Myers, Clayton; Slutz, Stephen A.; Weis, Matthew R.; Jennings, Christopher A.; Lamppa, Derek C.; Harvey-Thompson, Adam J.; Geissel, Matthias; Knapp, P.F.; Harding, Eric H.; Hansen, Stephanie B.; Mangan, Michael A.; Ruiz, Carlos L.; Chandler, Gordon A.; Hahn, Kelly D.; Webb, Timothy J.; Moore, Thomas; Laity, George R.; Ampleford, David J.; Peterson, K.J.; Rochau, G.A.; Sinars, Daniel

Abstract not provided.

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TYPE Conference Poster YEAR 2019
OSTI

Enhancing performance of magnetized liner inertial fusion at the Z facility

Physics of Plasmas

Slutz, Stephen A.; Gomez, Matthew R.; Hansen, Stephanie B.; Harding, Eric H.; Hutsel, Brian T.; Knapp, P.F.; Lamppa, Derek C.; Awe, Thomas J.; Ampleford, David J.; Bliss, David E.; Chandler, Gordon A.; Cuneo, Michael E.; Geissel, Matthias; Glinsky, Michael E.; Hahn, Kelly D.; Harvey-Thompson, Adam J.; Hess, Mark H.; Jennings, Christopher A.; Jones, Brent M.; Laity, George R.; Martin, Matthew R.; Peterson, K.J.; Porter, John L.; Rambo, Patrick K.; Rochau, G.A.; Rovang, Dean C.; Ruiz, Carlos L.; Savage, Mark E.; Schwarz, Jens; Schmit, Paul; Shipley, Gabriel A.; Sinars, Daniel; Smith, Ian C.; Stygar, William; Vesey, Roger A.; Weis, Matthew R.

The Magnetized Liner Inertial Fusion concept (MagLIF) [Slutz et al., Phys. Plasmas 17, 056303 (2010)] is being studied on the Z facility at Sandia National Laboratories. Neutron yields greater than 1012 have been achieved with a drive current in the range of 17-18 MA and pure deuterium fuel [Gomez et al., Phys. Rev. Lett. 113, 155003 (2014)]. We show that 2D simulated yields are about twice the best yields obtained on Z and that a likely cause of this difference is the mix of material into the fuel. Mitigation strategies are presented. Previous numerical studies indicate that much larger yields (10-1000 MJ) should be possible with pulsed power machines producing larger drive currents (45-60 MA) than can be produced by the Z machine [Slutz et al., Phys. Plasmas 23, 022702 (2016)]. To test the accuracy of these 2D simulations, we present modifications to MagLIF experiments using the existing Z facility, for which 2D simulations predict a 100-fold enhancement of MagLIF fusion yields and considerable increases in burn temperatures. Experimental verification of these predictions would increase the credibility of predictions at higher drive currents.

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TYPE Journal Article YEAR 2018
DOIOSTIScopus

Recent Diagnostic Platform Accomplishments for Studying Vacuum Power Flow Physics at the Sandia Z Accelerator

Laity, George R.; Aragon, Carlos; Bennett, Nichelle L.; Bliss, David E.; Foulk, James W.; Fierro, Andrew S.; Gomez, Matthew R.; Hess, Mark H.; Hutsel, Brian T.; Jennings, Christopher A.; Johnston, Mark D.; Kossow, Michael R.; Lamppa, Derek C.; Martin, Matthew R.; Patel, Sonal G.; Porwitzky, Andrew J.; Robinson, Allen C.; Rose, David; Vandevender, Pace; Waisman, Eduardo M.; Webb, Timothy J.; Welch, Dale; Rochau, G.A.; Savage, Mark E.; Stygar, William; White, William M.; Sinars, Daniel; Cuneo, Michael E.

Abstract not provided.

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TYPE Conference Poster YEAR 2018
OSTI

Measurements of Z Electrode Temperatures Using Absolutely Calibrated Streaked Visible Spectroscopy Systems and Avalanche Photodiodes

IEEE International Conference on Plasma Science

Patel, Sonal G.; Johnston, Mark D.; Bliss, David E.; Laity, George R.; Gomez, Matthew R.; Falcon, Ross E.; Scoglietti, Daniel J.; Macrunnels, Keven A.; Savage, Mark E.; Cuneo, Michael E.

Absolute calibration of streaked visible spectroscopy systems has been performed at Z-machine at Sandia National Labs in order to determine temperatures of electrode surfaces during the current pulse. The ability to calibrate the full system, including all fiber optic runs and probes is crucial to understanding errors in the calibration process. The calibration procedure involves imaging a blackbody light source, with a known spectral radiance which is coupled to an integrating sphere. This source is streaked slowly over a few ns using Sydor streak cameras. The slow sweep is converted to a 100-500ns sweep by imaging a bright light source on both sweep rates, and obtaining wavelength and time dependent correction curves. Any broadband light source or several laser lines of differing wavelengths can be used for this correction. This technique has yielded temperature estimates of several eV in the Z convolute.

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TYPE Conference Poster YEAR 2018
OSTIScopus

Direct measurements of anode/cathode gap plasma in cylindrically imploding loads on the Z machine

Physics of Plasmas

Porwitzky, Andrew J.; Foulk, James W.; Martin, Matthew R.; Laity, George R.; Mattsson, Thomas

By deploying a photon Doppler velocimetry based plasma diagnostic, we have directly observed low density plasma in the load anode/cathode gap of cylindrically converging pulsed power targets. The arrival of this plasma is temporally correlated with gross current loss and subtle power flow differences between the anode and the cathode. The density is in the range where Hall terms in the electromagnetic equations are relevant, but this physics is lacking in the magnetohydrodynamics codes commonly used to design, analyze, and optimize pulsed power experiments. Here, the present work presents evidence of the importance of physics beyond traditional resistive magnetohydrodynamics for the design of pulsed power targets and drivers.

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TYPE Journal Article YEAR 2018
DOIOSTI
Results 26–50 of 73
Results 26–50 of 73