Resonance density range governs two-plasmon decay saturation and enables hot-electron prediction in inertial confinement fusion
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915313633722368 |
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| author | Yao, C. Li, J. Hao, L. Yan, R. Tao, T. Zheng, G-N. Jia, Q. Ding, Y-K. Zheng, J. |
| author_facet | Yao, C. Li, J. Hao, L. Yan, R. Tao, T. Zheng, G-N. Jia, Q. Ding, Y-K. Zheng, J. |
| contents | The saturation level of parametric instabilities critically determines their impact on fusion plasmas. We identify the resonance density range of two-plasmon decay as the critical parameter governing nonlinear saturation of ion density fluctuations and Langmuir waves, which drive hot-electron generation. Using this insight, we develop a predictive scaling model for the hot-electron energy fraction f_{hot} that depends only on the laser intensity I, with plasma conditions encoded via plasma ablation theory. The model can work for various experimental configurations-requiring only two (I, f_{hot}) data points to calibrate coefficients-and successfully reproduces results from prior OMEGA and OMEGA-EP experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_24607 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Resonance density range governs two-plasmon decay saturation and enables hot-electron prediction in inertial confinement fusion Yao, C. Li, J. Hao, L. Yan, R. Tao, T. Zheng, G-N. Jia, Q. Ding, Y-K. Zheng, J. Plasma Physics The saturation level of parametric instabilities critically determines their impact on fusion plasmas. We identify the resonance density range of two-plasmon decay as the critical parameter governing nonlinear saturation of ion density fluctuations and Langmuir waves, which drive hot-electron generation. Using this insight, we develop a predictive scaling model for the hot-electron energy fraction f_{hot} that depends only on the laser intensity I, with plasma conditions encoded via plasma ablation theory. The model can work for various experimental configurations-requiring only two (I, f_{hot}) data points to calibrate coefficients-and successfully reproduces results from prior OMEGA and OMEGA-EP experiments. |
| title | Resonance density range governs two-plasmon decay saturation and enables hot-electron prediction in inertial confinement fusion |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2505.24607 |