Shock ignition is a scheme for direct drive inertial confinement fusion that offers the potential for high gain with the current generation of laser facility; however, the benefits are thought to be dependent on the use of low adiabat implosions without laser–plasma instabilities reducing drive and generating hot electrons. A National Ignition Facility direct drive solid target experiment was used to calibrate a 3D Monte Carlo hot-electron model for 2D radiation-hydrodynamic simulations of a shock ignition implosion. The α = 2.5 adiabat implosion was calculated to suffer a 35% peak areal density decrease when the hot electron population with temperature Tℎ = 55 keV and energy Eℎ = 13 kJ was added to the simulation. Optimizing the pulse shape can recover ~1/3 of the peak areal density lost due to a change in shock timing. Here, despite the harmful impact of laser–plasma instabilities, the simulations indicate shock ignition as a viable method to improve performance and broaden the design space of near ignition high adiabat implosions.
Barlow, Duncan, et al. "Role of hot electrons in shock ignition constrained by experiment at the National Ignition Facility." Physics of Plasmas, vol. 29, no. 8, Aug. 2022. https://doi.org/10.1063/5.0097080
Barlow, Duncan, Goffrey, T., Bennett, K., Scott, R. H., Glize, K., Theobald, W., Anderson, K., Solodov, A. A., Rosenberg, M. J., Hohenberger, M., Woolsey, N. C., Bradford, P., Khan, M., & Arber, T. D. (2022). Role of hot electrons in shock ignition constrained by experiment at the National Ignition Facility. Physics of Plasmas, 29(8). https://doi.org/10.1063/5.0097080
Barlow, Duncan, Goffrey, T., Bennett, K., et al., "Role of hot electrons in shock ignition constrained by experiment at the National Ignition Facility," Physics of Plasmas 29, no. 8 (2022), https://doi.org/10.1063/5.0097080
@article{osti_1886300,
author = {Barlow, Duncan and Goffrey, T. and Bennett, K. and Scott, R. H. and Glize, K. and Theobald, W. and Anderson, K. and Solodov, A. A. and Rosenberg, M. J. and Hohenberger, M. and others},
title = {Role of hot electrons in shock ignition constrained by experiment at the National Ignition Facility},
annote = {Shock ignition is a scheme for direct drive inertial confinement fusion that offers the potential for high gain with the current generation of laser facility; however, the benefits are thought to be dependent on the use of low adiabat implosions without laser–plasma instabilities reducing drive and generating hot electrons. A National Ignition Facility direct drive solid target experiment was used to calibrate a 3D Monte Carlo hot-electron model for 2D radiation-hydrodynamic simulations of a shock ignition implosion. The α = 2.5 adiabat implosion was calculated to suffer a 35% peak areal density decrease when the hot electron population with temperature Tℎ = 55 keV and energy Eℎ = 13 kJ was added to the simulation. Optimizing the pulse shape can recover ~1/3 of the peak areal density lost due to a change in shock timing. Here, despite the harmful impact of laser–plasma instabilities, the simulations indicate shock ignition as a viable method to improve performance and broaden the design space of near ignition high adiabat implosions.},
doi = {10.1063/5.0097080},
url = {https://www.osti.gov/biblio/1886300},
journal = {Physics of Plasmas},
issn = {ISSN 1070-664X},
number = {8},
volume = {29},
place = {United States},
publisher = {American Institute of Physics (AIP)},
year = {2022},
month = {08}}
E. M., Christopherson, A. R. ; Betti, R. ; Forrest, C. J. ; Howard, J. ; Theobald, W. ; Delettrez, J. A. ; Rosenberg, M. J. ; Solodov, A. A. ; Stoeckl, C. ; Patel, D. ; Gopalaswamy, V. ; Cao, D. ; Peebles, J. L. ; Edgell, D. H. ; Seka, W. ; Epstein, R. ; Wei, M. S. ; Gatu Johnson, M. ; Simpson, R. ; Regan, S. P. ; Campbell,