National direct-drive program on OMEGA and the National Ignition Facility
العنوان: | National direct-drive program on OMEGA and the National Ignition Facility |
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المؤلفون: | Suxing Hu, D. R. Harding, A. Shvydky, T. C. Sangster, R. L. McCrory, Maria Gatu-Johnson, Riccardo Betti, Susan Regan, Dustin Froula, T. R. Boehly, Igor V. Igumenshchev, W. Theobald, F. J. Marshall, Christian Stoeckl, V. Yu. Glebov, J. A. Delettrez, W. Seka, D. T. Michel, Chad Forrest, D. H. Edgell, E. M. Campbell, V. N. Goncharov, J.F. Myatt, Ronald M. Epstein, P. B. Radha |
المصدر: | Plasma Physics and Controlled Fusion. 59:014008 |
بيانات النشر: | IOP Publishing, 2016. |
سنة النشر: | 2016 |
مصطلحات موضوعية: | Physics, Offset (computer science), Nuclear engineering, Cryogenics, Condensed Matter Physics, Laser, 01 natural sciences, Omega, 010305 fluids & plasmas, law.invention, Ignition system, Nuclear Energy and Engineering, law, Power Balance, 0103 physical sciences, Laser power scaling, 010306 general physics, National Ignition Facility |
الوصف: | 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. |
تدمد: | 1361-6587 0741-3335 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e66604021917c05a2ce5bddbd847d906 https://doi.org/10.1088/0741-3335/59/1/014008 |
حقوق: | CLOSED |
رقم الأكسشن: | edsair.doi...........e66604021917c05a2ce5bddbd847d906 |
قاعدة البيانات: | OpenAIRE |
تدمد: | 13616587 07413335 |
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