Constraining preheat energy deposition in MagLIF experiments with multi-frame shadowgraphy

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

doi:10.1063/1.5086044

Constraining preheat energy deposition in MagLIF experiments with multi-frame shadowgraphy

Journal Article · Thu Mar 07 23:00:00 EST 2019 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5086044· OSTI ID:1545362

Harvey-Thompson, A. J. ^[1]; ^[1]; Jennings, C. A. ^[1]; ^[1]; ^[1]; ^[1]; ^[1]; Chandler, G. A. ^[1]; Glinsky, M. E. ^[1]; Hahn, K. D. ^[2]; Hansen, S. B. ^[1]; Harding, E. C. ^[1]; Knapp, P. F. ^[1]; Paguio, R. R. ^[3]; Perea, L. ^[1]; Peterson, K. J. ^[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)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
General Atomics, San Diego, CA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Maryland, College Park, MD (United States)

A multi-frame shadowgraphy diagnostic has been developed and applied to laser preheat experiments relevant to the Magnetized Liner Inertial Fusion (MagLIF) concept. The diagnostic views the plasma created by laser preheat in MagLIF-relevant gas cells immediately after the laser deposits energy as well as the resulting blast wave evolution later in time. The expansion of the blast wave is modeled with 1D radiation-hydrodynamic simulations that relate the boundary of the blast wave at a given time to the energy deposited into the fuel. This technique is applied to four different preheat protocols that have been used in integrated MagLIF experiments to infer the amount of energy deposited by the laser into the fuel. The results of the integrated MagLIF experiments are compared with those of two-dimensional LASNEX simulations. Here, the best performing shots returned neutron yields ~40–55% of the simulated predictions for three different preheat protocols

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC52-07NA27344; NA0003525; NA0003864

OSTI ID:: 1545362

Alternate ID(s):: OSTI ID: 1570271

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 26; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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