Deceleration-stage Rayleigh–Taylor growth in a background magnetic field studied in cylindrical and Cartesian geometries
Experiments have identified the Rayleigh–Taylor (RT) instability as one of the greatest obstacles to achieving inertial confinement fusion. Consequently, mitigation strategies to reduce RT growth and fuel–ablator mixing in the hotspot during the deceleration phase of the implosion are of great inter...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2022-03-01
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| Series: | Matter and Radiation at Extremes |
| Online Access: | http://dx.doi.org/10.1063/5.0062168 |
| _version_ | 1818394068563001344 |
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| author | C. Samulski B. Srinivasan M. J.-E. Manuel R. Masti J. P. Sauppe J. Kline |
| author_facet | C. Samulski B. Srinivasan M. J.-E. Manuel R. Masti J. P. Sauppe J. Kline |
| author_sort | C. Samulski |
| collection | DOAJ |
| description | Experiments have identified the Rayleigh–Taylor (RT) instability as one of the greatest obstacles to achieving inertial confinement fusion. Consequently, mitigation strategies to reduce RT growth and fuel–ablator mixing in the hotspot during the deceleration phase of the implosion are of great interest. In this work, the effect of seed magnetic fields on deceleration-phase RT growth are studied in planar and cylindrical geometries under conditions relevant to the National Ignition Facility (NIF) and Omega experiments. The magnetohydrodynamic (MHD) and resistive-MHD capabilities of the FLASH code are used to model imploding cylinders and planar blast-wave-driven targets. Realistic target and laser parameters are presented that suggest the occurrence of morphological differences in late-time RT evolution in the cylindrical NIF case and a measurable difference in spike height of single-mode growth in the planar NIF case. The results of this study indicate the need for target designs to utilize an RT-unstable foam–foam interface in order to achieve sufficient magnetic field amplification to alter RT evolution. Benchmarked FLASH simulations are used to study these magnetic field effects in both resistive and ideal MHD. |
| first_indexed | 2024-12-14T05:55:20Z |
| format | Article |
| id | doaj.art-5f23901263b44d76a4017fec021b1371 |
| institution | Directory Open Access Journal |
| issn | 2468-080X |
| language | English |
| last_indexed | 2024-12-14T05:55:20Z |
| publishDate | 2022-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | Matter and Radiation at Extremes |
| spelling | doaj.art-5f23901263b44d76a4017fec021b13712022-12-21T23:14:35ZengAIP Publishing LLCMatter and Radiation at Extremes2468-080X2022-03-0172026902026902-1210.1063/5.0062168Deceleration-stage Rayleigh–Taylor growth in a background magnetic field studied in cylindrical and Cartesian geometriesC. Samulski0B. Srinivasan1M. J.-E. Manuel2R. Masti3J. P. Sauppe4J. Kline5Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, USAVirginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, USAGeneral Atomics, P.O. Box 85608, San Diego, California 92186, USAVirginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, USALos Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USALos Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USAExperiments have identified the Rayleigh–Taylor (RT) instability as one of the greatest obstacles to achieving inertial confinement fusion. Consequently, mitigation strategies to reduce RT growth and fuel–ablator mixing in the hotspot during the deceleration phase of the implosion are of great interest. In this work, the effect of seed magnetic fields on deceleration-phase RT growth are studied in planar and cylindrical geometries under conditions relevant to the National Ignition Facility (NIF) and Omega experiments. The magnetohydrodynamic (MHD) and resistive-MHD capabilities of the FLASH code are used to model imploding cylinders and planar blast-wave-driven targets. Realistic target and laser parameters are presented that suggest the occurrence of morphological differences in late-time RT evolution in the cylindrical NIF case and a measurable difference in spike height of single-mode growth in the planar NIF case. The results of this study indicate the need for target designs to utilize an RT-unstable foam–foam interface in order to achieve sufficient magnetic field amplification to alter RT evolution. Benchmarked FLASH simulations are used to study these magnetic field effects in both resistive and ideal MHD.http://dx.doi.org/10.1063/5.0062168 |
| spellingShingle | C. Samulski B. Srinivasan M. J.-E. Manuel R. Masti J. P. Sauppe J. Kline Deceleration-stage Rayleigh–Taylor growth in a background magnetic field studied in cylindrical and Cartesian geometries Matter and Radiation at Extremes |
| title | Deceleration-stage Rayleigh–Taylor growth in a background magnetic field studied in cylindrical and Cartesian geometries |
| title_full | Deceleration-stage Rayleigh–Taylor growth in a background magnetic field studied in cylindrical and Cartesian geometries |
| title_fullStr | Deceleration-stage Rayleigh–Taylor growth in a background magnetic field studied in cylindrical and Cartesian geometries |
| title_full_unstemmed | Deceleration-stage Rayleigh–Taylor growth in a background magnetic field studied in cylindrical and Cartesian geometries |
| title_short | Deceleration-stage Rayleigh–Taylor growth in a background magnetic field studied in cylindrical and Cartesian geometries |
| title_sort | deceleration stage rayleigh taylor growth in a background magnetic field studied in cylindrical and cartesian geometries |
| url | http://dx.doi.org/10.1063/5.0062168 |
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