Proton array focused by a laser-irradiated mesh

S. H. Zhai, B. F. Shen, M. Borghesi, W. P. Wang, H. Zhang, S. Kar, H. Ahmed, J. F. Li, S. S. Li, C. Wang, X. M. Lu, X. L. Wang, R. J. Xu, L. H. Yu, Y. X. Leng, X. Y. Liang, R. X. Li, Z. Z. Xu

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We present a technique on focusing laser-driven proton beams in an array pattern by employing a copper mesh irradiated by a separate, intense laser pulse. Transient fields are generated on the mesh following the intense interaction. Under the combined effect of collisional scattering and electrical deflections from the mesh, a laser-driven proton beam is split into multiple focused beams with a high density of ∼4 × 109/cm2 after propagation through the charged-up mesh. The particle density within the focused beamlets is up to ∼11 times the initial density of the proton beam. Multiple beam focusing through this approach may open routes for proton beam conditioning, leading to opportunities for multi-beam applications, such as tomographic radiography and proton implantation.
Original languageEnglish
Article number013509
Number of pages5
JournalApplied Physics Letters
Issue number1
Early online date08 Jan 2019
Publication statusEarly online date - 08 Jan 2019

Bibliographical note

doi: 10.1063/1.5054884

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