Investigation of magnetic inhibition effect on ion acceleration at high laser intensities
| العنوان: | Investigation of magnetic inhibition effect on ion acceleration at high laser intensities |
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| المؤلفون: | Weimin Zhou, L. B. Meng, Baohan Zhang, H. Huang, S. K. He, Zhimeng Zhang, Wei Hong, Wei Qi, Bo Cui |
| المصدر: | Matter and Radiation at Extremes, Vol 6, Iss 4, Pp 044401-044401-9 (2021) |
| بيانات النشر: | AIP Publishing, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Coupling, Nuclear and High Energy Physics, Materials science, Proton, QC770-798, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, 010305 fluids & plasmas, Magnetic field, law.invention, Acceleration, Magnetization, Nuclear Energy and Engineering, law, Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, Irradiation, Electrical and Electronic Engineering, Atomic physics, 010306 general physics, Scaling |
| الوصف: | The irradiation of a target with high laser intensity can lead to self-generation of an intense magnetic field (B-field) on the target surface. It has therefore been suggested that the sheath-driven acceleration of high-energy protons would be significantly hampered by the magnetization effect of this self-generated B-field at high enough laser intensities. In this paper, particle-in-cell simulations are used to study this magnetization effect on sheath-driven proton acceleration. It is shown that the inhibitory effect of the B-field on ion acceleration is not as significant as previously thought. Moreover, it is shown that the magnetization effect plays a relatively limited role in high-energy proton acceleration, even at high laser intensities when the mutual coupling and competition between self-generated electric (E-) and B-fields are considered in a realistic sheath acceleration scenario. A theoretical model including the v × B force is presented and confirms that the rate of reduction in proton energy depends on the strength ratio between B- and E-fields rather than on the strength of the B-field alone, and that only a small percentage of the proton energy is affected by the self-generated B-field. Finally, it is shown that the degraded scaling of proton energy at high laser intensities can be explained by the decrease in acceleration time caused by the increased sheath fields at high laser intensities rather than by the magnetic inhibitory effect, because of the longer growth time scale of the latter. This understanding of the magnetization effect may pave the way to the generation of high-energy protons by sheath-driven acceleration at high laser intensities. |
| تدمد: | 2468-080X 2468-2047 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2e8b4442c96a2ea3dff83943d482647 https://doi.org/10.1063/5.0029163 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....d2e8b4442c96a2ea3dff83943d482647 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 2468080X 24682047 |
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