Diagnosing and mitigating laser preheat induced mix in MagLIF

Harvey-Thompson, A. J.; Weis, M. R.; Harding, E. C.; Geissel, M.; Ampleford, D. J.; Chandler, G. A.; Fein, J. R.; Glinsky, M. E.; Gomez, M. R.; Hahn, K. D.; Hansen, S. B.; Jennings, C. A.; Knapp, P. F.; Paguio, R. R.; Perea, L.; Peterson, K. J.; Porter, J. L.; Rambo, P. K.; Robertson, G. K.; Rochau, G. A.; Ruiz, D. E.; Schwarz, J.; Shores, J. E.; Sinars, D. B.; Slutz, S. A.; Smith, G. E.; Smith, I. C.; Speas, C. S.; Whittemore, K.

doi:10.1063/1.5050931

Title: Diagnosing and mitigating laser preheat induced mix in MagLIF

Journal Article · Fri Nov 16 00:00:00 EST 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5050931· OSTI ID:1492367

Harvey-Thompson, A. J. ^[1];

^[1]; Harding, E. C. ^[1];

^[1];

^[1]; Chandler, G. A. ^[1];

^[1]; Glinsky, M. E. ^[1];

^[1]; Hahn, K. D. ^[1]; Hansen, S. B. ^[1]; Jennings, C. A. ^[1];

^[1]; Paguio, R. R. ^[2]; Perea, L. ^[1];

^[1]; Porter, J. L. ^[1]; Rambo, P. K. ^[1]; Robertson, G. K. ^[1]; Rochau, G. A. ^[1] more »

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
General Atomics, San Diego, CA (United States)

A series of Magnetized Liner Inertial Fusion (MagLIF) experiments have been conducted in order to investigate the mix introduced from various target surfaces during the laser preheat stage. The material mixing was measured spectroscopically for a variety of preheat protocols by employing mid-atomic number surface coatings applied to different regions of the MagLIF target. The data show that the material from the top cushion region of the target can be mixed into the fuel during preheat. For some preheat protocols, our experiments show that the laser-entrance-hole (LEH) foil used to contain the fuel can be transported into the fuel a significant fraction of the stagnation length and degrade the target performance. Preheat protocols using pulse shapes of a few-ns duration result in the observable LEH foil mix both with and without phase-plate beam smoothing. In order to reduce this material mixing, a new capability was developed to allow for a low energy (~20 J) laser pre-pulse to be delivered early in time (–20 ns) before the main laser pulse (~1.5 kJ). In experiments, this preheat protocol showed no indications of the LEH foil mix. As a result, the experimental results are broadly in agreement with pre-shot two-dimensional HYDRA simulations that helped motivate the development of the early pre-pulse capability.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1492367

Report Number(s):: SAND-2018-13636J; 670631

Journal Information:: Physics of Plasmas, Vol. 25, Issue 11; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 20 works

Citation information provided by
Web of Science

References (15)

Fluorescence and absorption spectroscopy for warm dense matter studies and ICF plasma diagnostics Hansen, S. B.; Harding, E. C.; Knapp, P. F. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5018580	journal	May 2018
Changes in the electronic structure of highly compressed iron revealed by X-ray fluorescence lines and absorption edges Hansen, S. B.; Harding, E. C.; Knapp, P. F. High Energy Density Physics, Vol. 24 https://doi.org/10.1016/j.hedp.2017.07.002	journal	September 2017
Design of magnetized liner inertial fusion experiments using the Z facility Sefkow, A. B.; Slutz, S. A.; Koning, J. M. Physics of Plasmas, Vol. 21, Issue 7 https://doi.org/10.1063/1.4890298	journal	July 2014
Demonstration of thermonuclear conditions in magnetized liner inertial fusion experimentsa) Gomez, M. R.; Slutz, S. A.; Sefkow, A. B. Physics of Plasmas, Vol. 22, Issue 5 https://doi.org/10.1063/1.4919394	journal	May 2015
Minimizing scatter-losses during pre-heat for magneto-inertial fusion targets Geissel, Matthias; Harvey-Thompson, Adam J.; Awe, Thomas J. Physics of Plasmas, Vol. 25, Issue 2 https://doi.org/10.1063/1.5003038	journal	February 2018
Diagnosing magnetized liner inertial fusion experiments on Za) Hansen, S. B.; Gomez, M. R.; Sefkow, A. B. Physics of Plasmas, Vol. 22, Issue 5 https://doi.org/10.1063/1.4921217	journal	May 2015
Pulsed-power-driven cylindrical liner implosions of laser preheated fuel magnetized with an axial field Slutz, S. A.; Herrmann, M. C.; Vesey, R. A. Physics of Plasmas, Vol. 17, Issue 5 https://doi.org/10.1063/1.3333505	journal	May 2010
Experimental Demonstration of Fusion-Relevant Conditions in Magnetized Liner Inertial Fusion Gomez, M. R.; Slutz, S. A.; Sefkow, A. B. Physical Review Letters, Vol. 113, Issue 15 https://doi.org/10.1103/PhysRevLett.113.155003	journal	October 2014
Analysis and implementation of a space resolving spherical crystal spectrometer for x-ray Thomson scattering experiments Harding, E. C.; Ao, T.; Bailey, J. E. Review of Scientific Instruments, Vol. 86, Issue 4 https://doi.org/10.1063/1.4918619	journal	April 2015
Laser propagation measurements in long-scale-length underdense plasmas relevant to magnetized liner inertial fusion Harvey-Thompson, A. J.; Sefkow, A. B.; Wei, M. S. Physical Review E, Vol. 94, Issue 5 https://doi.org/10.1103/PhysRevE.94.051201	journal	November 2016
Z-Beamlet: a multikilojoule, terawatt-class laser system Rambo, Patrick K.; Smith, Ian C.; Porter, John L. Applied Optics, Vol. 44, Issue 12 https://doi.org/10.1364/AO.44.002421	journal	January 2005
Advances in NLTE modeling for integrated simulations Scott, H. A.; Hansen, S. B. High Energy Density Physics, Vol. 6, Issue 1 https://doi.org/10.1016/j.hedp.2009.07.003	journal	January 2010
Scaling magnetized liner inertial fusion on Z and future pulsed-power accelerators Slutz, S. A.; Stygar, W. A.; Gomez, M. R. Physics of Plasmas, Vol. 23, Issue 2 https://doi.org/10.1063/1.4941100	journal	February 2016
Fusion-neutron-yield, activation measurements at the Z accelerator: Design, analysis, and sensitivity Hahn, K. D.; Cooper, G. W.; Ruiz, C. L. Review of Scientific Instruments, Vol. 85, Issue 4 https://doi.org/10.1063/1.4870779	journal	April 2014
Three-dimensional HYDRA simulations of National Ignition Facility targets Marinak, M. M.; Kerbel, G. D.; Gentile, N. A. Physics of Plasmas, Vol. 8, Issue 5 https://doi.org/10.1063/1.1356740	journal	May 2001

Cited By (2)

Constraining preheat energy deposition in MagLIF experiments with multi-frame shadowgraphy Harvey-Thompson, A. J.; Geissel, M.; Jennings, C. A. Physics of Plasmas, Vol. 26, Issue 3 https://doi.org/10.1063/1.5086044	journal	March 2019
Nernst thermomagnetic waves in magnetized high energy density plasmas Velikovich, A. L.; Giuliani, J. L.; Zalesak, S. T. Physics of Plasmas, Vol. 26, Issue 11 https://doi.org/10.1063/1.5122178	journal	November 2019

Similar Records

Investigating Laser Preheat and Applied Magnetic Fields Relevant to the MagLIF Fusion Scheme

Technical Report · Sat Oct 01 00:00:00 EDT 2016 · OSTI ID:1492367

Harvey-Thompson, Adam James; Geissel, Matthias; Sefkow, Adam B.; +1 more

The effect of laser entrance hole foil thickness on MagLIF-relevant laser preheat

Journal Article · Thu Nov 05 00:00:00 EST 2020 · Physics of Plasmas · OSTI ID:1492367

Harvey-Thompson, A. J.; Weis, M. R.; Ruiz, D. E.; +7 more

Scaling laser preheat for MagLIF with the Z-Beamlet laser

Journal Article · Fri Jan 15 00:00:00 EST 2021 · Physics of Plasmas · OSTI ID:1492367

Weis, Matthew Robert; Harvey-Thompson, Adam James; Ruiz, Daniel Edward

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Title: Diagnosing and mitigating laser preheat induced mix in MagLIF

Citation Formats

References (15)

Cited By (2)

Similar Records

Related Subjects