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Patel D, Knauer JP, Cao D, Betti R, Nora R, Shvydky A, Gopalaswamy V, Lees A, Sampat S, Donaldson WR, Regan SP, Stoeckl C, Forrest CJ, Glebov VY, Harding DR, Bonino MJ, Janezic RT, Wasilewski D, Fella C, Shuldberg C, Murray J, Guzman D, Serrato B. Effects of Laser Bandwidth in Direct-Drive High-Performance DT-Layered Implosions on the OMEGA Laser. Phys Rev Lett 2023; 131:105101. [PMID: 37739360 DOI: 10.1103/physrevlett.131.105101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 07/05/2023] [Accepted: 08/16/2023] [Indexed: 09/24/2023]
Abstract
In direct-drive inertial confinement fusion, the laser bandwidth reduces the laser imprinting seed of hydrodynamic instabilities. The impact of varying bandwidth on the performance of direct-drive DT-layered implosions was studied in targets with different hydrodynamic stability properties. The stability was controlled by changing the shell adiabat from (α_{F}≃5) (more stable) to (α_{F}≃3.5) (less stable). These experiments show that the performance of lower adiabat implosions improves considerably as the bandwidth is raised indicating that further bandwidth increases, beyond the current capabilities of OMEGA, would be greatly beneficial. These results suggest that the future generation of ultra-broadband lasers could enable achieving high convergence and possibly high gains in direct drive ICF.
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Affiliation(s)
- D Patel
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
- Department of Mechanical Engineering, University of Rochester, New York 14623, USA
| | - J P Knauer
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - D Cao
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - R Betti
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
- Department of Mechanical Engineering, University of Rochester, New York 14623, USA
- Department of Physics and Astronomy, University of Rochester, New York 14623, USA
| | - R Nora
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Shvydky
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - V Gopalaswamy
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - A Lees
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - S Sampat
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - W R Donaldson
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - S P Regan
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - C Stoeckl
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - C J Forrest
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - V Yu Glebov
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - D R Harding
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - M J Bonino
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - R T Janezic
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - D Wasilewski
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - C Fella
- Laboratory for Laser Energetics, University of Rochester, New York 14623, USA
| | - C Shuldberg
- General Atomics, San Diego, California 92186, USA
| | - J Murray
- General Atomics, San Diego, California 92186, USA
| | - D Guzman
- General Atomics, San Diego, California 92186, USA
| | - B Serrato
- General Atomics, San Diego, California 92186, USA
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