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Nora R, Theobald W, Betti R, Marshall FJ, Michel DT, Seka W, Yaakobi B, Lafon M, Stoeckl C, Delettrez J, Solodov AA, Casner A, Reverdin C, Ribeyre X, Vallet A, Peebles J, Beg FN, Wei MS. Gigabar spherical shock generation on the OMEGA laser. PHYSICAL REVIEW LETTERS 2015; 114:045001. [PMID: 25679896 DOI: 10.1103/physrevlett.114.045001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 06/04/2023]
Abstract
This Letter presents the first experimental demonstration of the capability to launch shocks of several-hundred Mbar in spherical targets--a milestone for shock ignition [R. Betti et al., Phys. Rev. Lett. 98, 155001 (2007)]. Using the temporal delay between the launching of the strong shock at the outer surface of the spherical target and the time when the shock converges at the center, the shock-launching pressure can be inferred using radiation-hydrodynamic simulations. Peak ablation pressures exceeding 300 Mbar are inferred at absorbed laser intensities of ∼3×10(15) W/cm2. The shock strength is shown to be significantly enhanced by the coupling of suprathermal electrons with a total converted energy of up to 8% of the incident laser energy. At the end of the laser pulse, the shock pressure is estimated to exceed ∼1 Gbar because of convergence effects.
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Affiliation(s)
- R Nora
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA and Fusion Science Center, University of Rochester, Rochester, New York 14623, USA and Department of Physics and Astronomy and/or Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA
| | - W Theobald
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - R Betti
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA and Fusion Science Center, University of Rochester, Rochester, New York 14623, USA and Department of Physics and Astronomy and/or Mechanical Engineering, University of Rochester, Rochester, New York 14623, USA
| | - F J Marshall
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - D T Michel
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - W Seka
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - B Yaakobi
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - M Lafon
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - C Stoeckl
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - J Delettrez
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - A A Solodov
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - A Casner
- CEA, DAM, DIF, F-91297 Arpajon, France
| | | | - X Ribeyre
- Université de Bordeaux-CNRS-CEA, CELIA (Centre Lasers Intenses et Applications) UMR 5107 F-33400 Talence, France
| | - A Vallet
- Université de Bordeaux-CNRS-CEA, CELIA (Centre Lasers Intenses et Applications) UMR 5107 F-33400 Talence, France
| | - J Peebles
- University of California, La Jolla, California 92093, USA
| | - F N Beg
- Fusion Science Center, University of Rochester, Rochester, New York 14623, USA and University of California, La Jolla, California 92093, USA
| | - M S Wei
- Fusion Science Center, University of Rochester, Rochester, New York 14623, USA and General Atomics, San Diego, California 92121, USA
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Theobald W, Casner A, Nora R, Ribeyre X, Lafon M, Anderson K, Betti R, Craxton R, Delettrez J, Frenje J, Glebov V, Gotchev O, Hohenberger M, Hu S, Marshall F, McCrory R, Meyerhofer D, Perkins L, Sangster T, Schurtz G, Seka W, Smalyuk V, Stoeckl C, Yaakobi B. Progress in the shock-ignition inertial confinement fusion concept. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20135903001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Philippe F, Casner A, Caillaud T, Landoas O, Monteil MC, Liberatore S, Park HS, Amendt P, Robey H, Sorce C, Li CK, Seguin F, Rosenberg M, Petrasso R, Glebov V, Stoeckl C. Experimental demonstration of X-ray drive enhancement with rugby-shaped hohlraums. PHYSICAL REVIEW LETTERS 2010; 104:035004. [PMID: 20366653 DOI: 10.1103/physrevlett.104.035004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Indexed: 05/29/2023]
Abstract
Rugby-shaped hohlraums have been suggested as a way to enhance x-ray drive in the indirect drive approach to inertial confinement fusion. This Letter presents an experimental comparison of rugby-shaped and cylinder hohlraums used for D2 and D3He-filled capsules implosions on the Omega laser facility, demonstrating an increase of x-ray flux by 18% in rugby-shaped hohlraums. The highest yields to date for deuterium gas implosions in indirect drive on Omega (1.5x10{10} neutrons) were obtained, allowing for the first time the measurement of a DD burn history. Proton spectra measurements provide additional validation of the higher drive in rugby-shaped hohlraums.
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