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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.27239 |
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| _version_ | 1866918264324489216 |
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| author | Kumar, Sintu Jaiswal, Pratibha Bhardwaj, Km. Shivani Rai, Rajesh Kumar |
| author_facet | Kumar, Sintu Jaiswal, Pratibha Bhardwaj, Km. Shivani Rai, Rajesh Kumar |
| contents | Ultra-high field intensities are essential for developing high-energy-density physics and compact plasma accelerators, but they are essentially constrained by the limitations of focusing distance and nonlinear efficiency. We present a theoretical model for extreme laser energy concentration in under-dense plasma that shows a highly effective, magnetically supported pathway. We demonstrate a fundamental, nonlinear enhancement of the relativistic self-focusing (RSF) mechanism by adjusting an external magnetic field close to the cyclotron resonance (Ce=0.7). Over a remarkably short distance of 1.25 Rayleigh lengths, the pulse is driven into a catastrophic, coupled collapse by this magnetic enhancement. Significant temporal self-compression (0.60) and simultaneous spatial confinement (0.05) are the outcomes of the dynamics. Importantly, this combined confinement results in a localized peak intensity amplification factor greater than 103 compared to the initial state. This work offers a clear, practical blueprint for upcoming laser-plasma experiments and validates a reliable and compact technique for producing petawatt-scale power densities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_27239 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Synchronized Catastrophic Collapse and Extreme Intensity Amplification of Ultra-Intense Pulses in Near-Resonance Magnetized Plasma Kumar, Sintu Jaiswal, Pratibha Bhardwaj, Km. Shivani Rai, Rajesh Kumar Plasma Physics Ultra-high field intensities are essential for developing high-energy-density physics and compact plasma accelerators, but they are essentially constrained by the limitations of focusing distance and nonlinear efficiency. We present a theoretical model for extreme laser energy concentration in under-dense plasma that shows a highly effective, magnetically supported pathway. We demonstrate a fundamental, nonlinear enhancement of the relativistic self-focusing (RSF) mechanism by adjusting an external magnetic field close to the cyclotron resonance (Ce=0.7). Over a remarkably short distance of 1.25 Rayleigh lengths, the pulse is driven into a catastrophic, coupled collapse by this magnetic enhancement. Significant temporal self-compression (0.60) and simultaneous spatial confinement (0.05) are the outcomes of the dynamics. Importantly, this combined confinement results in a localized peak intensity amplification factor greater than 103 compared to the initial state. This work offers a clear, practical blueprint for upcoming laser-plasma experiments and validates a reliable and compact technique for producing petawatt-scale power densities. |
| title | Synchronized Catastrophic Collapse and Extreme Intensity Amplification of Ultra-Intense Pulses in Near-Resonance Magnetized Plasma |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2510.27239 |