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Role of hot electrons in shock ignition constrained by experiment at the National Ignition Facility
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Barlow, D., Goffrey, T., Bennett, K., Scott, R. H. H., Glize, K., Theobald, W., Anderson, K., Solodov, A. A., Rosenberg, M. J., Hohenberger, M., Woolsey, N. C., Bradford, P., Khan, M. and Arber, T. D. (2022) Role of hot electrons in shock ignition constrained by experiment at the National Ignition Facility. Physics of Plasmas, 29 (8). 082704. doi:10.1063/5.0097080 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/5.0097080
Abstract
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 a=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. 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.
| Item Type: | Journal Article | ||||||||||||||||||
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||
| Journal or Publication Title: | Physics of Plasmas | ||||||||||||||||||
| Publisher: | American Institute of Physics | ||||||||||||||||||
| ISSN: | 1070-664X | ||||||||||||||||||
| Official Date: | 23 August 2022 | ||||||||||||||||||
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| Volume: | 29 | ||||||||||||||||||
| Number: | 8 | ||||||||||||||||||
| Number of Pages: | 9 | ||||||||||||||||||
| Article Number: | 082704 | ||||||||||||||||||
| DOI: | 10.1063/5.0097080 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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