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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2405.07187 |
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| _version_ | 1866929340821798912 |
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| author | Lian, C. -W. Ji, Y. Yan, R. Li, J. Cao, S. -H. Ren, C. Wang, L. -F. Ding, Y. -K. Zheng, J. |
| author_facet | Lian, C. -W. Ji, Y. Yan, R. Li, J. Cao, S. -H. Ren, C. Wang, L. -F. Ding, Y. -K. Zheng, J. |
| contents | The two-plasmon-decay instability (TPD) is a critical target preheating risk in direct-drive inertial confinement fusion. In this paper, TPD collectively driven by a normal-incidence laser beam (Beam-N) and a large-angle-incidence laser beam (Beam-L) is investigated via particle-in-cell simulations. Significant TPD growth is found able to develop in this regime at previously unexpected low laser intensities if the intensity of Beam-L exceeds the large-angle-incidence threshold. Both beams contribute to the growth of TPD in a "seed-amplification" manner where the absolute instability driven by Beam-L provides the seeds that get convectively amplified by Beam-N, making TPD energetically important and causing significant pump depletion and hot electron generation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_07187 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Two-Plasmon-Decay Instability Stimulated by a Normal- and Large-Angle-Incidence Laser Pair Lian, C. -W. Ji, Y. Yan, R. Li, J. Cao, S. -H. Ren, C. Wang, L. -F. Ding, Y. -K. Zheng, J. Plasma Physics The two-plasmon-decay instability (TPD) is a critical target preheating risk in direct-drive inertial confinement fusion. In this paper, TPD collectively driven by a normal-incidence laser beam (Beam-N) and a large-angle-incidence laser beam (Beam-L) is investigated via particle-in-cell simulations. Significant TPD growth is found able to develop in this regime at previously unexpected low laser intensities if the intensity of Beam-L exceeds the large-angle-incidence threshold. Both beams contribute to the growth of TPD in a "seed-amplification" manner where the absolute instability driven by Beam-L provides the seeds that get convectively amplified by Beam-N, making TPD energetically important and causing significant pump depletion and hot electron generation. |
| title | Two-Plasmon-Decay Instability Stimulated by a Normal- and Large-Angle-Incidence Laser Pair |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2405.07187 |