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Igumenshchev IV, Theobald W, Stoeckl C, Shah RC, Bishel DT, Goncharov VN, Bonino MJ, Campbell EM, Ceurvorst L, Chin DA, Collins TJB, Fess S, Harding DR, Sampat S, Shaffer NR, Shvydky A, Smith EA, Trickey WT, Waxer LJ, Colaïtis A, Liotard R, Adrian PJ, Atzeni S, Barbato F, Savino L, Alfonso N, Haid A, Do M. Proof-of-Principle Experiment on the Dynamic Shell Formation for Inertial Confinement Fusion. Phys Rev Lett 2023; 131:015102. [PMID: 37478441 DOI: 10.1103/physrevlett.131.015102] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 05/25/2023] [Indexed: 07/23/2023]
Abstract
In the dynamic-shell (DS) concept [V. N. Goncharov et al., Novel Hot-Spot Ignition Designs for Inertial Confinement Fusion with Liquid-Deuterium-Tritium Spheres, Phys. Rev. Lett. 125, 065001 (2020).PRLTAO0031-900710.1103/PhysRevLett.125.065001] for laser-driven inertial confinement fusion the deuterium-tritium fuel is initially in the form of a homogeneous liquid inside a wetted-foam spherical shell. This fuel is ignited using a conventional implosion, which is preceded by a initial compression of the fuel followed by its expansion and dynamic formation of a high-density fuel shell with a low-density interior. This Letter reports on a scaled-down, proof-of-principle experiment on the OMEGA laser demonstrating, for the first time, the feasibility of DS formation. A shell is formed by convergent shocks launched by laser pulses at the edge of a plasma sphere, with the plasma itself formed as a result of laser-driven compression and relaxation of a surrogate plastic-foam ball target. Three x-ray diagnostics, namely, 1D spatially resolved self-emission streaked imaging, 2D self-emission framed imaging, and backlighting radiography, have shown good agreement with the predicted evolution of the DS and its stability to low Legendre mode perturbations introduced by laser irradiation and target asymmetries.
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Affiliation(s)
- I V Igumenshchev
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - W Theobald
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - C Stoeckl
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - R C Shah
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - D T Bishel
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - V N Goncharov
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - M J Bonino
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - E M Campbell
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - L Ceurvorst
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - D A Chin
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - T J B Collins
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - S Fess
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - D R Harding
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - S Sampat
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - N R Shaffer
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - A Shvydky
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - E A Smith
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - W T Trickey
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - L J Waxer
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - A Colaïtis
- Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la libération, 33400 Talence, France
| | - R Liotard
- Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la libération, 33400 Talence, France
| | - P J Adrian
- Plasma Science and Fusion Center, MIT, Boston, Massachusetts 02139, USA
| | - S Atzeni
- Dipartimento SBAI, Università degli Studi di Roma "La Sapienza,", Via Antonio Scarpa 14, 00161 Roma, Italy
| | - F Barbato
- Dipartimento SBAI, Università degli Studi di Roma "La Sapienza,", Via Antonio Scarpa 14, 00161 Roma, Italy
| | - L Savino
- Dipartimento SBAI, Università degli Studi di Roma "La Sapienza,", Via Antonio Scarpa 14, 00161 Roma, Italy
| | - N Alfonso
- General Atomics, San Diego, California 92816, USA
| | - A Haid
- General Atomics, San Diego, California 92816, USA
| | - Mi Do
- General Atomics, San Diego, California 92816, USA
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2
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Turnbull D, Katz J, Sherlock M, Divol L, Shaffer NR, Strozzi DJ, Colaïtis A, Edgell DH, Follett RK, McMillen KR, Michel P, Milder AL, Froula DH. Inverse Bremsstrahlung Absorption. Phys Rev Lett 2023; 130:145103. [PMID: 37084458 DOI: 10.1103/physrevlett.130.145103] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/20/2023] [Indexed: 05/03/2023]
Abstract
Inverse bremsstrahlung absorption was measured based on transmission through a finite-length plasma that was thoroughly characterized using spatially resolved Thomson scattering. Expected absorption was then calculated using the diagnosed plasma conditions while varying the absorption model components. To match data, it is necessary to account for (i) the Langdon effect; (ii) laser-frequency (rather than plasma-frequency) dependence in the Coulomb logarithm, as is typical of bremsstrahlung theories but not transport theories; and (iii) a correction due to ion screening. Radiation-hydrodynamic simulations of inertial confinement fusion implosions have to date used a Coulomb logarithm from the transport literature and no screening correction. We anticipate that updating the model for collisional absorption will substantially revise our understanding of laser-target coupling for such implosions.
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Affiliation(s)
- D Turnbull
- University of Rochester Laboratory for Laser Energetics, Rochester 14623, New York, USA
| | - J Katz
- University of Rochester Laboratory for Laser Energetics, Rochester 14623, New York, USA
| | - M Sherlock
- Lawrence Livermore National Laboratory, Livermore 94550, California, USA
| | - L Divol
- Lawrence Livermore National Laboratory, Livermore 94550, California, USA
| | - N R Shaffer
- University of Rochester Laboratory for Laser Energetics, Rochester 14623, New York, USA
| | - D J Strozzi
- Lawrence Livermore National Laboratory, Livermore 94550, California, USA
| | - A Colaïtis
- Centre Lasers Intenses et Applications, Talence 33400, France
| | - D H Edgell
- University of Rochester Laboratory for Laser Energetics, Rochester 14623, New York, USA
| | - R K Follett
- University of Rochester Laboratory for Laser Energetics, Rochester 14623, New York, USA
| | - K R McMillen
- University of Rochester Laboratory for Laser Energetics, Rochester 14623, New York, USA
| | - P Michel
- Lawrence Livermore National Laboratory, Livermore 94550, California, USA
| | - A L Milder
- University of Alberta, Edmonton, Alberta T6G 2R3, Canada
| | - D H Froula
- University of Rochester Laboratory for Laser Energetics, Rochester 14623, New York, USA
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3
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Ceurvorst L, Theobald W, Rosenberg MJ, Radha PB, Stoeckl C, Betti R, Anderson KS, Marozas JA, Goncharov VN, Campbell EM, Shuldberg CM, Luo RW, Sweet W, Aghaian L, Carlson L, Bachmann B, Döppner T, Hohenberger M, Glize K, Scott RHH, Colaïtis A, Regan SP. Development of an x-ray radiography platform to study laser-direct-drive energy coupling at the National Ignition Facility. Rev Sci Instrum 2022; 93:105102. [PMID: 36319381 DOI: 10.1063/5.0098982] [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: 05/13/2022] [Accepted: 08/14/2022] [Indexed: 06/16/2023]
Abstract
A platform has been developed to study laser-direct-drive energy coupling at the National Ignition Facility (NIF) using a plastic sphere target irradiated in a polar-direct-drive geometry to launch a spherically converging shock wave. To diagnose this system evolution, eight NIF laser beams are directed onto a curved Cu foil to generate Heα line emission at a photon energy of 8.4 keV. These x rays are collected by a 100-ps gated x-ray imager in the opposing port to produce temporally gated radiographs. The platform is capable of acquiring images during and after the laser drive launches the shock wave. A backlighter profile is fit to the radiographs, and the resulting transmission images are Abel inverted to infer radial density profiles of the shock front and to track its temporal evolution. The measurements provide experimental shock trajectories and radial density profiles that are compared to 2D radiation-hydrodynamic simulations using cross-beam energy transfer and nonlocal heat-transport models.
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Affiliation(s)
- L Ceurvorst
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - W Theobald
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - M J Rosenberg
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - P B Radha
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - C Stoeckl
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - R Betti
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - K S Anderson
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - J A Marozas
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - V N Goncharov
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - E M Campbell
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | | | - R W Luo
- General Atomics, San Diego, California 92121, USA
| | - W Sweet
- General Atomics, San Diego, California 92121, USA
| | - L Aghaian
- General Atomics, San Diego, California 92121, USA
| | - L Carlson
- General Atomics, San Diego, California 92121, USA
| | - B Bachmann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Hohenberger
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K Glize
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Oxfordshire, OX11 0QX, United Kingdom
| | - R H H Scott
- Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Oxfordshire, OX11 0QX, United Kingdom
| | - A Colaïtis
- Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, Talence F-33405, France
| | - S P Regan
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
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4
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Pérez-Callejo G, Vlachos C, Walsh CA, Florido R, Bailly-Grandvaux M, Vaisseau X, Suzuki-Vidal F, McGuffey C, Beg FN, Bradford P, Ospina-Bohórquez V, Batani D, Raffestin D, Colaïtis A, Tikhonchuk V, Casner A, Koenig M, Albertazzi B, Fedosejevs R, Woolsey N, Ehret M, Debayle A, Loiseau P, Calisti A, Ferri S, Honrubia J, Kingham R, Mancini RC, Gigosos MA, Santos JJ. Cylindrical implosion platform for the study of highly magnetized plasmas at Laser MegaJoule. Phys Rev E 2022; 106:035206. [PMID: 36266806 DOI: 10.1103/physreve.106.035206] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 07/25/2022] [Indexed: 06/16/2023]
Abstract
Investigating the potential benefits of the use of magnetic fields in inertial confinement fusion experiments has given rise to experimental platforms like the Magnetized Liner Inertial Fusion approach at the Z-machine (Sandia National Laboratories) or its laser-driven equivalent at OMEGA (Laboratory for Laser Energetics). Implementing these platforms at MegaJoule-scale laser facilities, such as the Laser MegaJoule (LMJ) or the National Ignition Facility (NIF), is crucial to reaching self-sustained nuclear fusion and enlarges the level of magnetization that can be achieved through a higher compression. In this paper, we present a complete design of an experimental platform for magnetized implosions using cylindrical targets at LMJ. A seed magnetic field is generated along the axis of the cylinder using laser-driven coil targets, minimizing debris and increasing diagnostic access compared with pulsed power field generators. We present a comprehensive simulation study of the initial B field generated with these coil targets, as well as two-dimensional extended magnetohydrodynamics simulations showing that a 5 T initial B field is compressed up to 25 kT during the implosion. Under these circumstances, the electrons become magnetized, which severely modifies the plasma conditions at stagnation. In particular, in the hot spot the electron temperature is increased (from 1 keV to 5 keV) while the density is reduced (from 40g/cm^{3} to 7g/cm^{3}). We discuss how these changes can be diagnosed using x-ray imaging and spectroscopy, and particle diagnostics. We propose the simultaneous use of two dopants in the fuel (Ar and Kr) to act as spectroscopic tracers. We show that this introduces an effective spatial resolution in the plasma which permits an unambiguous observation of the B-field effects. Additionally, we present a plan for future experiments of this kind at LMJ.
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Affiliation(s)
- G Pérez-Callejo
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
- Departamento de Física Teórica, Atómica y Óptica, Universidad de Valladolid, 47011 Valladolid, Spain
| | - C Vlachos
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
- Institute of Plasma Physics & Lasers, Hellenic Mediterranean University Research Centre, 74100 Rethymno, Greece
| | - C A Walsh
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Florido
- iUNAT-Departamento de Física, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas de Gran Canaria, Spain
| | - M Bailly-Grandvaux
- Center for Energy Research, University of California-San Diego, La Jolla, California 92093, USA
| | | | - F Suzuki-Vidal
- Plasma Physics Group, The Blackett Laboratory, Imperial College London, London SW7 2AZ, United Kingdom
| | - C McGuffey
- General Atomics, San Diego, California 92121, USA
| | - F N Beg
- Center for Energy Research, University of California-San Diego, La Jolla, California 92093, USA
| | - P Bradford
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
| | - V Ospina-Bohórquez
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
- CEA, DAM, DIF, F-91297 Arpajon, France
- University of Salamanca, 37008 Salamanca, Spain
- Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères-le-Châtel, France
| | - D Batani
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
| | - D Raffestin
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
| | - A Colaïtis
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
| | - V Tikhonchuk
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
- ELI-Beamlines, Institute of Physics, Czech Academy of Sciences, 25241 Dolní Brezany, Czech Republic
| | - A Casner
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
- CEA-CESTA, CS 60001, 33116 Le Barp Cedex, France
| | - M Koenig
- LULI-CNRS, CEA, Sorbonne Universites, Ecole Polytechnique, Institut Polytechnique de Paris, F-91128 Palaiseau Cedex, France
| | - B Albertazzi
- LULI-CNRS, CEA, Sorbonne Universites, Ecole Polytechnique, Institut Polytechnique de Paris, F-91128 Palaiseau Cedex, France
| | - R Fedosejevs
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, T6G1R1 Alberta, Canada
| | - N Woolsey
- Department of Physics, University of York, Heslington YO10 5DD, United Kingdom
| | - M Ehret
- Centro de Laseres Pulsados, Building M5, Science Park, 37185 Villamayor, Salamanca, Spain
| | - A Debayle
- CEA, DAM, DIF, F-91297 Arpajon, France
- Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères-le-Châtel, France
| | - P Loiseau
- CEA, DAM, DIF, F-91297 Arpajon, France
- Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères-le-Châtel, France
| | - A Calisti
- Aix Marseille Université, CNRS, PIIM, F-13013 Marseille, France
| | - S Ferri
- Aix Marseille Université, CNRS, PIIM, F-13013 Marseille, France
| | - J Honrubia
- ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, 28040 Madrid, Spain
| | - R Kingham
- Plasma Physics Group, The Blackett Laboratory, Imperial College London, London SW7 2AZ, United Kingdom
| | - R C Mancini
- Department of Physics, University of Nevada, Reno, Nevada 89557, USA
| | - M A Gigosos
- Departamento de Física Teórica, Atómica y Óptica, Universidad de Valladolid, 47011 Valladolid, Spain
| | - J J Santos
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications (CELIA), UMR 5107, F-33405 Talence, France
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5
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Colaïtis A, Turnbull DP, Igumenschev IV, Edgell D, Shah RC, Mannion OM, Stoeckl C, Jacob-Perkins D, Shvydky A, Janezic R, Kalb A, Cao D, Forrest CJ, Kwiatkowski J, Regan S, Theobald W, Goncharov VN, Froula DH. 3D Simulations Capture the Persistent Low-Mode Asymmetries Evident in Laser-Direct-Drive Implosions on OMEGA. Phys Rev Lett 2022; 129:095001. [PMID: 36083671 DOI: 10.1103/physrevlett.129.095001] [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: 03/15/2022] [Revised: 06/30/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Spherical implosions in inertial confinement fusion are inherently sensitive to perturbations that may arise from experimental constraints and errors. Control and mitigation of low-mode (long wavelength) perturbations is a key milestone to improving implosion performances. We present the first 3D radiation-hydrodynamic simulations of directly driven inertial confinement fusion implosions with an inline package for polarized crossed-beam energy transfer. Simulations match bang times, yields (separately accounting for laser-induced high modes and fuel age), hot spot flow velocities and direction, for which polarized crossed-beam energy transfer contributes to the systematic flow orientation evident in the OMEGA implosion database. Current levels of beam mispointing, imbalance, target offset, and asymmetry from polarized crossed-beam energy transfer degrade yields by more than 40%. The effectiveness of two mitigation strategies for low modes is explored.
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Affiliation(s)
- A Colaïtis
- Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la libération, 33400 Talence, France
| | - D P Turnbull
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - I V Igumenschev
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - D Edgell
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - R C Shah
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - O M Mannion
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - C Stoeckl
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - D Jacob-Perkins
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - A Shvydky
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - R Janezic
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - A Kalb
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - D Cao
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - C J Forrest
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - J Kwiatkowski
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - S Regan
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - W Theobald
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - V N Goncharov
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
| | - D H Froula
- Laboratory for Laser Energetics, 250 East River Road, Rochester, New York 14623-1212, USA
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6
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Koester P, Baffigi F, Cristoforetti G, Labate L, Gizzi LA, Baton S, Koenig M, Colaïtis A, Batani D, Casner A, Raffestin D, Tentori A, Trela J, Rousseaux C, Boutoux G, Brygoo S, Jacquet L, Reverdin C, Le Bel E, Le-Deroff L, Theobald W, Shigemori K. Bremsstrahlung cannon design for shock ignition relevant regime. Rev Sci Instrum 2021; 92:013501. [PMID: 33514221 DOI: 10.1063/5.0022030] [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: 07/16/2020] [Accepted: 12/11/2020] [Indexed: 06/12/2023]
Abstract
We report on the optimization of a BremsStrahlung Cannon (BSC) design for the investigation of laser-driven fast electron populations in a shock ignition relevant experimental campaign at the Laser Megajoule-PETawatt Aquitaine Laser facility. In this regime with laser intensities of 1015 W/cm2-1016 W/cm2, fast electrons with energies ≤100 keV are expected to be generated through Stimulated Raman Scattering (SRS) and Two Plasmon Decay (TPD) instabilities. The main purpose of the BSC in our experiment is to identify the contribution to x-ray emission from bremsstrahlung of fast electrons originating from SRS and TPD, with expected temperatures of 40 keV and 95 keV, respectively. Data analysis and reconstruction of the distributions of x-ray photons incident on the BSC are described.
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Affiliation(s)
- P Koester
- Intense Laser Irradiation Laboratory, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
| | - F Baffigi
- Intense Laser Irradiation Laboratory, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
| | - G Cristoforetti
- Intense Laser Irradiation Laboratory, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
| | - L Labate
- Intense Laser Irradiation Laboratory, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
| | - L A Gizzi
- Intense Laser Irradiation Laboratory, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
| | - S Baton
- Laboratoire pour l'Utilisation des Lasers Intenses, LULI, CNRS-Ecole Polytechnique-CEA-Sorbonne Universités, UMR 7605, F-91128 Palaiseau, France
| | - M Koenig
- Laboratoire pour l'Utilisation des Lasers Intenses, LULI, CNRS-Ecole Polytechnique-CEA-Sorbonne Universités, UMR 7605, F-91128 Palaiseau, France
| | - A Colaïtis
- Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence, France
| | - D Batani
- Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence, France
| | - A Casner
- Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence, France
| | - D Raffestin
- Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence, France
| | - A Tentori
- Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence, France
| | - J Trela
- Centre Lasers Intenses et Applications, CELIA, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence, France
| | - C Rousseaux
- Commissariat á l'energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Île-de-France, F-91297 Arpajon, France
| | - G Boutoux
- Commissariat á l'energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Île-de-France, F-91297 Arpajon, France
| | - S Brygoo
- Commissariat á l'energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Île-de-France, F-91297 Arpajon, France
| | - L Jacquet
- Commissariat á l'energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Île-de-France, F-91297 Arpajon, France
| | - C Reverdin
- Commissariat á l'energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Île-de-France, F-91297 Arpajon, France
| | - E Le Bel
- Commissariat á l'energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Centre d'études Scientifiques et Techniques d'Aquitaine, CESTA, F-33114 Le Barp, France
| | - L Le-Deroff
- Commissariat á l'energie Atomique et aux Énergies Alternatives, CEA, Direction des Applications Militaires, DAM, Centre d'études Scientifiques et Techniques d'Aquitaine, CESTA, F-33114 Le Barp, France
| | - W Theobald
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - K Shigemori
- Institute of Laser Engineering, University of Osaka, Osaka 565-0871, Japan
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7
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Colaïtis A, Duchateau G, Ribeyre X, Maheut Y, Boutoux G, Antonelli L, Nicolaï P, Batani D, Tikhonchuk V. Coupled hydrodynamic model for laser-plasma interaction and hot electron generation. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 92:041101. [PMID: 26565161 DOI: 10.1103/physreve.92.041101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Indexed: 06/05/2023]
Abstract
We present a formulation of the model of laser-plasma interaction (LPI) at hydrodynamical scales that couples the plasma dynamics with linear and nonlinear LPI processes, including the creation and propagation of high-energy electrons excited by parametric instabilities and collective effects. This formulation accounts for laser beam refraction and diffraction, energy absorption due to collisional and resonant processes, and hot electron generation due to the stimulated Raman scattering, two-plasmon decay, and resonant absorption processes. Hot electron (HE) transport and absorption are described within the multigroup angular scattering approximation, adapted for transversally Gaussian electron beams. This multiscale inline LPI-HE model is used to interpret several shock ignition experiments, highlighting the importance of target preheating by HEs and the shortcomings of standard geometrical optics when modeling the propagation and absorption of intense laser pulses. It is found that HEs from parametric instabilities significantly increase the shock pressure and velocity in the target, while decreasing its strength and the overall ablation pressure.
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Affiliation(s)
- A Colaïtis
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France
| | - G Duchateau
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France
| | - X Ribeyre
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France
| | - Y Maheut
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France
| | - G Boutoux
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France
| | - L Antonelli
- Dipartimento SBAI, Università degli Studi di Roma "La Sapienza," Via Antonio Scarpa, 14, 00161 Rome, Italy
- Università di Roma "Tor Vergata," Dipartimento di Ingegneria Industriale, Via del Politecnico 1, 00133 Rome, Italy
| | - Ph Nicolaï
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France
| | - D Batani
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France
| | - V Tikhonchuk
- Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France
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8
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Colaïtis A, Duchateau G, Ribeyre X, Tikhonchuk V. Modeling of the cross-beam energy transfer with realistic inertial-confinement-fusion beams in a large-scale hydrocode. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 91:013102. [PMID: 25679718 DOI: 10.1103/physreve.91.013102] [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: 06/26/2014] [Indexed: 06/04/2023]
Abstract
A method for modeling realistic laser beams smoothed by kinoform phase plates is presented. The ray-based paraxial complex geometrical optics (PCGO) model with Gaussian thick rays allows one to create intensity variations, or pseudospeckles, that reproduce the beam envelope, contrast, and high-intensity statistics predicted by paraxial laser propagation codes. A steady-state cross-beam energy-transfer (CBET) model is implemented in a large-scale radiative hydrocode based on the PCGO model. It is used in conjunction with the realistic beam modeling technique to study the effects of CBET between coplanar laser beams on the target implosion. The pseudospeckle pattern imposed by PCGO produces modulations in the irradiation field and the shell implosion pressure. Cross-beam energy transfer between beams at 20(∘) and 40(∘) significantly degrades the irradiation symmetry by amplifying low-frequency modes and reducing the laser-capsule coupling efficiency, ultimately leading to large modulations of the shell areal density and lower convergence ratios. These results highlight the role of laser-plasma interaction and its influence on the implosion dynamics.
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Affiliation(s)
- A Colaïtis
- Centre Lasers Intenses et Applications, UMR No. 5107 associée au Université de Bordeaux, CNRS, and CEA, 351 Cours de la Libération, 33400 Talence, France
| | - G Duchateau
- Centre Lasers Intenses et Applications, UMR No. 5107 associée au Université de Bordeaux, CNRS, and CEA, 351 Cours de la Libération, 33400 Talence, France
| | - X Ribeyre
- Centre Lasers Intenses et Applications, UMR No. 5107 associée au Université de Bordeaux, CNRS, and CEA, 351 Cours de la Libération, 33400 Talence, France
| | - V Tikhonchuk
- Centre Lasers Intenses et Applications, UMR No. 5107 associée au Université de Bordeaux, CNRS, and CEA, 351 Cours de la Libération, 33400 Talence, France
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9
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Colaïtis A, Duchateau G, Nicolaï P, Tikhonchuk V. Towards modeling of nonlinear laser-plasma interactions with hydrocodes: the thick-ray approach. Phys Rev E Stat Nonlin Soft Matter Phys 2014; 89:033101. [PMID: 24730950 DOI: 10.1103/physreve.89.033101] [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: 09/02/2013] [Indexed: 06/03/2023]
Abstract
This paper deals with the computation of laser beam intensity in large-scale radiative hydrocodes applied to the modeling of nonlinear laser-plasma interactions (LPIs) in inertial confinement fusion (ICF). The paraxial complex geometrical optics (PCGO) is adapted for light waves in an inhomogeneous medium and modified to include the inverse bremsstrahlung absorption and the ponderomotive force. This thick-ray model is compared to the standard ray-tracing (RT) approach, both in the chic code. The PCGO model leads to different power deposition patterns and better diffraction modeling compared to standard RT codes. The intensity-reconstruction technique used in RT codes to model nonlinear LPI leads to artificial filamentation and fails to reproduce realistic ponderomotive self-focusing distances, intensity amplifications, and density channel depletions, whereas PCGO succeeds. Bundles of Gaussian thick rays can be used to model realistic non-Gaussian ICF beams. The PCGO approach is expected to improve the accuracy of ICF simulations and serve as a basis to implement diverse LPI effects in large-scale hydrocodes.
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Affiliation(s)
- A Colaïtis
- Université de Bordeaux 1, CNRS, CEA, Centre Lasers Intenses et Applications, UMR No. 5107, 351 Cours de la Libération, 33400 Talence, France
| | - G Duchateau
- Université de Bordeaux 1, CNRS, CEA, Centre Lasers Intenses et Applications, UMR No. 5107, 351 Cours de la Libération, 33400 Talence, France
| | - P Nicolaï
- Université de Bordeaux 1, CNRS, CEA, Centre Lasers Intenses et Applications, UMR No. 5107, 351 Cours de la Libération, 33400 Talence, France
| | - V Tikhonchuk
- Université de Bordeaux 1, CNRS, CEA, Centre Lasers Intenses et Applications, UMR No. 5107, 351 Cours de la Libération, 33400 Talence, France
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