Proton probing measurements of filamentary electromagnetic structure in laser ablation of solids
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866916000676446208 |
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| author | Peebles, J. Heuer, P. V. Barnak, D. H. Zhang, V. Y. Davies, J. R. |
| author_facet | Peebles, J. Heuer, P. V. Barnak, D. H. Zhang, V. Y. Davies, J. R. |
| contents | Proton radiography of laser direct-drive spherical implosions has shown anomalous structures that correspond to strong electric or magnetic fields extending throughout the corona. These fields have the ability to affect laser-target interactions and act as an energy sink. To better understand the these fields, simplified experiments were conducted in planar geometry on the OMEGA EP laser at the Laboratory for Laser Energetics. Varying target material, target size, pulse shape, and intensity, and measured the field structure using dual-axis proton radiography and a 4w probe. Proton radiographs were analyzed and quantitatively demonstrate that the growth of these features is dominated by laser energy and target Z. The data strongly supports that a secondary instability as a consequence of the expansion driven Weibel instability in these interactions is the primary driver for these fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_05614 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Proton probing measurements of filamentary electromagnetic structure in laser ablation of solids Peebles, J. Heuer, P. V. Barnak, D. H. Zhang, V. Y. Davies, J. R. Plasma Physics Proton radiography of laser direct-drive spherical implosions has shown anomalous structures that correspond to strong electric or magnetic fields extending throughout the corona. These fields have the ability to affect laser-target interactions and act as an energy sink. To better understand the these fields, simplified experiments were conducted in planar geometry on the OMEGA EP laser at the Laboratory for Laser Energetics. Varying target material, target size, pulse shape, and intensity, and measured the field structure using dual-axis proton radiography and a 4w probe. Proton radiographs were analyzed and quantitatively demonstrate that the growth of these features is dominated by laser energy and target Z. The data strongly supports that a secondary instability as a consequence of the expansion driven Weibel instability in these interactions is the primary driver for these fields. |
| title | Proton probing measurements of filamentary electromagnetic structure in laser ablation of solids |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2605.05614 |