First Measurements of Rayleigh-Taylor-Induced Magnetic Fields in Laser-Produced Plasmas

Manuel, M. J.-E.; Li, C. K.; Sèguin, F. H.; Frenje, J. A.; Casey, D. T.; Petrasso, R. D.; Hu, S. X.; Betti, R.; Hager, J. D.; Meyerhofer, D. D.; Smalyuk, V. A.

doi:10.1103/physrevlett.108.255006

Cited by 76 publications

(43 citation statements)

References 31 publications

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“…Applied magnetic fields have been shown to reduce hot-spot thermal losses and increase temperatures in various ICF contexts [2][3][4][5]. Self-generated magnetic fields have been measured in the ablation region of ICF experiments [6,7] and field generation and amplification has been studied using simulations of single Rayleigh-Taylor spikes [8,9]. Magnetic transport at the edge of direct-drive hot spots has also been studied in two-dimensional simulations [10].…”

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confidence: 99%

Self-Generated Magnetic Fields in the Stagnation Phase of Indirect-Drive Implosions on the National Ignition Facility

et al. 2017

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Three-dimensional extended-magnetohydrodynamic simulations of the stagnation phase of inertial confinement fusion implosion experiments at the National Ignition Facility are presented, showing selfgenerated magnetic fields over 10 4 T. Angular high mode-number perturbations develop large magnetic fields, but are localized to the cold, dense hot-spot surface, which is hard to magnetize. When low-mode perturbations are also present, the magnetic fields are injected into the hot core, reaching significant magnetizations, with peak local thermal conductivity reductions greater than 90%. However, Righi-Leduc heat transport effectively cools the hot spot and lowers the neutron spectra-inferred ion temperatures compared to the unmagnetized case. The Nernst effect qualitatively changes the results by demagnetizing the hot-spot core, while increasing magnetizations at the edge and near regions of large heat loss.

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confidence: 99%

Self-Generated Magnetic Fields in the Stagnation Phase of Indirect-Drive Implosions on the National Ignition Facility

et al. 2017

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“…Large magnetic fields can be generated in electrically conducting fluids by a variety of mechanisms, including spatially non-uniform energy absorption [1][2][3][4] and hydrodynamic [5][6][7][8][9], thermal [10], and thermomagnetic instabilities [11]. Much progress has been made in recent years on understanding the generation and transport of these fields in high-energy-density plasmas [12], motivated by problems in laboratory astrophysics [13], magnetic reconnection [14][15][16][17][18], hydrodynamic-instability growth [19], shock-wave dynamics [20][21][22], and inertial confinement fusion [23].…”

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Precision Mapping of Laser-Driven Magnetic Fields and Their Evolution in High-Energy-Density Plasmas

et al. 2015

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“…Nonaligned temperature and density gradients created by RT growth generate magnetic fields. [13][14][15][16][17][18][19] The strength of these fields depends on the plasma and hydrodynamic conditions, but in general, they increase with the perturbation amplitude and are created locally near the unstable interface. As perturbations grow, the associated RT-induced field strength increases.…”

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confidence: 99%

“…In the astrophysical cases, Re m is very large due to the incredibly large scales over which these systems exist indicating that magnetic diffusion is negligible in the evolution; this regime is more difficult to reach in our lab system. The first experimental observations of B-fields induced by the RT instability 14,16 were achieved during the laserablation of a solid plastic target. The system is RT unstable and surface-perturbation growth into the hot plasma generates measurable magnetic fields during the linear growth phase.…”

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confidence: 99%

Collisional effects on Rayleigh-Taylor-induced magnetic fieldsa)

et al. 2015

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Magnetic-field generation from the Rayleigh-Taylor (RT) instability was predicted more than 30 years ago, though experimental measurements of this phenomenon have only occurred in the past few years. These pioneering observations demonstrated that collisional effects are important to B-field evolution. To produce fields of a measurable strength, high-intensity lasers irradiate solid targets to generate the nonaligned temperature and density gradients required for B-field generation. The ablation process naturally generates an unstable system where RT-induced magnetic fields form. Field strengths inferred from monoenergetic-proton radiographs indicate that in the ablation region diffusive effects caused by finite plasma resistivity are not negligible. Results from the first proof-of-existence experiments are reviewed and the role of collisional effects on B-field evolution is discussed in detail. V C 2015 AIP Publishing LLC. [http://dx.

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First Measurements of Rayleigh-Taylor-Induced Magnetic Fields in Laser-Produced Plasmas

Cited by 76 publications

References 31 publications

Self-Generated Magnetic Fields in the Stagnation Phase of Indirect-Drive Implosions on the National Ignition Facility

Self-Generated Magnetic Fields in the Stagnation Phase of Indirect-Drive Implosions on the National Ignition Facility

Precision Mapping of Laser-Driven Magnetic Fields and Their Evolution in High-Energy-Density Plasmas

Collisional effects on Rayleigh-Taylor-induced magnetic fieldsa)

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