Advanced analysis of laser-driven pulsed magnetic diffusion based on quantum molecular dynamics simulation
Magnetic diffusion plays an important role in inertial confinement fusion with strong magnetic fields. In this paper, we improve a previous analysis of the generation and diffusion of the magnetic field [Morita et al., Phys. Plasmas 25, 094505 (2018)]. For the generation process, we calculate the te...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2021-11-01
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| Series: | Matter and Radiation at Extremes |
| Online Access: | http://dx.doi.org/10.1063/5.0053621 |
| _version_ | 1818425783502241792 |
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| author | Hiroki Morita Tadashi Ogitsu Frank R. Graziani Shinsuke Fujioka |
| author_facet | Hiroki Morita Tadashi Ogitsu Frank R. Graziani Shinsuke Fujioka |
| author_sort | Hiroki Morita |
| collection | DOAJ |
| description | Magnetic diffusion plays an important role in inertial confinement fusion with strong magnetic fields. In this paper, we improve a previous analysis of the generation and diffusion of the magnetic field [Morita et al., Phys. Plasmas 25, 094505 (2018)]. For the generation process, we calculate the temporal evolution of the coil current using a self-consistent circuit model. The results show that the peak of the calculated magnetic field is delayed by 1.2 ns compared with that of the incident laser pulse. For the diffusion process, we evaluate the electrical conductivity of warm dense gold over a wide temperature range (300 K–100 eV) by combining the Kubo–Greenwood formula based on a quantum molecular dynamics simulation with the modified Spitzer model. Our simulation shows that the maximum magnetic field (530 T) that penetrates the cone is delayed by 2.5 ns compared with the laser peak. This result is consistent with experiments [Sakata et al., Nat. Commun. 9, 3937 (2018)] that showed that applying a strong magnetic field improved the heating efficiency of fusion fuel. |
| first_indexed | 2024-12-14T14:19:25Z |
| format | Article |
| id | doaj.art-2d14c9f52e1e4e3485a1377ba987db75 |
| institution | Directory Open Access Journal |
| issn | 2468-080X |
| language | English |
| last_indexed | 2024-12-14T14:19:25Z |
| publishDate | 2021-11-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | Matter and Radiation at Extremes |
| spelling | doaj.art-2d14c9f52e1e4e3485a1377ba987db752022-12-21T22:58:06ZengAIP Publishing LLCMatter and Radiation at Extremes2468-080X2021-11-0166065901065901-1010.1063/5.0053621Advanced analysis of laser-driven pulsed magnetic diffusion based on quantum molecular dynamics simulationHiroki Morita0Tadashi Ogitsu1Frank R. Graziani2Shinsuke Fujioka3Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, JapanLawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USALawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USAInstitute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871, JapanMagnetic diffusion plays an important role in inertial confinement fusion with strong magnetic fields. In this paper, we improve a previous analysis of the generation and diffusion of the magnetic field [Morita et al., Phys. Plasmas 25, 094505 (2018)]. For the generation process, we calculate the temporal evolution of the coil current using a self-consistent circuit model. The results show that the peak of the calculated magnetic field is delayed by 1.2 ns compared with that of the incident laser pulse. For the diffusion process, we evaluate the electrical conductivity of warm dense gold over a wide temperature range (300 K–100 eV) by combining the Kubo–Greenwood formula based on a quantum molecular dynamics simulation with the modified Spitzer model. Our simulation shows that the maximum magnetic field (530 T) that penetrates the cone is delayed by 2.5 ns compared with the laser peak. This result is consistent with experiments [Sakata et al., Nat. Commun. 9, 3937 (2018)] that showed that applying a strong magnetic field improved the heating efficiency of fusion fuel.http://dx.doi.org/10.1063/5.0053621 |
| spellingShingle | Hiroki Morita Tadashi Ogitsu Frank R. Graziani Shinsuke Fujioka Advanced analysis of laser-driven pulsed magnetic diffusion based on quantum molecular dynamics simulation Matter and Radiation at Extremes |
| title | Advanced analysis of laser-driven pulsed magnetic diffusion based on quantum molecular dynamics simulation |
| title_full | Advanced analysis of laser-driven pulsed magnetic diffusion based on quantum molecular dynamics simulation |
| title_fullStr | Advanced analysis of laser-driven pulsed magnetic diffusion based on quantum molecular dynamics simulation |
| title_full_unstemmed | Advanced analysis of laser-driven pulsed magnetic diffusion based on quantum molecular dynamics simulation |
| title_short | Advanced analysis of laser-driven pulsed magnetic diffusion based on quantum molecular dynamics simulation |
| title_sort | advanced analysis of laser driven pulsed magnetic diffusion based on quantum molecular dynamics simulation |
| url | http://dx.doi.org/10.1063/5.0053621 |
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