National direct-drive program on OMEGA and the National Ignition Facility

Goncharov, V. N.; Regan, S. P.; Campbell, E. M.; Sangster, T. C.; Radha, P. B.; Myatt, J. F.; Froula, D. H.; Betti, R.; Boehly, T. R.; Delettrez, J. A.; Edgell, D. H.; Epstein, R.; Forrest, C. J.; Yu Glebov, V.; Harding, D. R.; Hu, S. X.; Igumenshchev, I. V.; Marshall, F. J.; McCrory, R. L.; Michel, D. T.; Seka, W.; Shvydky, A.; Stoeckl, C.; Theobald, W.; Gatu-Johnson, M.

doi:10.1088/0741-3335/59/1/014008

National direct-drive program on OMEGA and the National Ignition Facility

Journal Article · Tue Oct 18 00:00:00 EDT 2016 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/0741-3335/59/1/014008· OSTI ID:1535451

Goncharov, V. N. ^[1]; Regan, S. P. ^[2]; Campbell, E. M. ^[2]; Sangster, T. C. ^[2]; Radha, P. B. ^[2]; Myatt, J. F. ^[2]; Froula, D. H. ^[2]; Betti, R. ^[2]; Boehly, T. R. ^[2]; Delettrez, J. A. ^[2]; Edgell, D. H. ^[2]; Epstein, R. ^[2]; Forrest, C. J. ^[2]; Yu Glebov, V. ^[2]; Harding, D. R. ^[2]; Hu, S. X. ^[2]; Igumenshchev, I. V. ^[2]; Marshall, F. J. ^[2]; McCrory, R. L. ^[2]; Michel, D. T. ^[2] more »

University of Rochester, NY (United States); OSTI
University of Rochester, NY (United States)
Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)

We report a major advantage of the laser direct-drive (DD) approach to ignition is the increased fraction of laser drive energy coupled to the hot spot and relaxed hot-spot requirements for the peak pressure and convergence ratios relative to the indirect-drive approach at equivalent laser energy. With the goal of a successful ignition demonstration using DD, the recently established national strategy has several elements and involves multiple national and international institutions. These elements include the experimental demonstration on OMEGA cryogenic implosions of hot-spot conditions relevant for ignition at MJ-scale energies available at the National Ignition Facility (NIF) and developing an understanding of laser-plasma interactions and laser coupling using DD experiments on the NIF. DD designs require reaching central stagnation pressures in excess of 100 Gbar. The current experiments on OMEGA have achieved inferred peak pressures of 56 Gbar (Regan et al 2016 Phys. Rev. Lett. 117 025001). Extensive analysis of the cryogenic target experiments and two- and three-dimensional simulations suggest that power balance, target offset, and target quality are the main limiting factors in target performance. In addition, cross-beam energy transfer (CBET) has been identified as the main mechanism reducing laser coupling. Reaching the goal of demonstrating hydrodynamic equivalence on OMEGA includes improving laser power balance, target position, and target quality at shot time. CBET must also be significantly reduced and several strategies have been identified to address this issue.

View Accepted Manuscript (DOE)

Research Organization:: University of Rochester, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); University of Rochester; New York State Energy Research and Development Authority

Grant/Contract Number:: NA0001944

OSTI ID:: 1535451

Alternate ID(s):: OSTI ID: 1329267
OSTI ID: 22717595

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 1 Vol. 59; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Inferred UV fluence focal-spot profiles from soft x-ray pinhole-camera measurements on OMEGA Theobald, W.; Sorce, C.; Donaldson, W. R. Review of Scientific Instruments, Vol. 91, Issue 2 https://doi.org/10.1063/1.5120708	journal	February 2020
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Path integral Monte Carlo simulations of warm dense aluminum Driver, K. P.; Soubiran, F.; Militzer, B. Physical Review E, Vol. 97, Issue 6 https://doi.org/10.1103/physreve.97.063207	journal	June 2018
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