Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session NP11: Poster Session V: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: Stellerators
HED: High Energy Density
BEAMS: Short Pulse Laser Plasmas
HED: Short Pulse Laser Plasma
SPACE: Space Plasmas
9:30 AM - 12:30 PM
Wednesday, October 19, 2022
Room: Exhibit Hall A and Online
Abstract: NP11.00110 : Low divergence multi-10-MeV protons driven by a twisted driver*
Presenter:
Camilla Willim
(Instituto Superior Tecnico)
Authors:
Camilla Willim
(Instituto Superior Tecnico)
Jorge Vieira
(Instituto Superior Tecnico)
Victor Malka
(Weizmann Institute of Science)
Luis O Silva
(Instituto Superior Tecnico)
We demonstrate that a twisted laser [2] in combination with a double-layer target (for enhanced proton energies [3]) has the potential to reduce the proton bunch divergence by almost an order of magnitude while accelerating to similar energies (multi-10-MeV) when compared to a Gaussian driver. We find that a less pronounced self-focusing of the twisted laser [4] plays a critical role in our findings and identify a regime that allows for consistent acceleration of highly collimated proton bunches for a broad range of moderate laser energies. The self-consistent laser–plasma dynamics is investigated analytically and by relying on three-dimensional particle-in-cell simulations in OSIRIS.
[1] A. Macchi et al., Rev. Modern Phys. 85, 715 (2013)., [2] L. Allen et al., Phys. Rev. A 45, 8185 (1992). [3] M. J. Ma et al., Phys. Rev. Lett. 122, 014803 (2019), [4] L. Sa and J. Vieira, Phys. Rev. A 100, 013836 (2019).
*The project that gave rise to these results received the support of a fellowship from the "la Caixa" Foundation (ID 100010434). The fellowship code is "LCF/BQ/DI19/11730025". We acknowledge PRACE for access to resources on MareNostrum (Barcelona Supercomputing Center). The work was supported by the European Research Council (InPairs ERC-2015-AdG no. 695088), The Schwartz/Reisman Center for Intense Laser Physics, a research grant from the Benoziyo Endowment Fund for the Advancement of Science, by the Israel Science Foundation, Minerva, Wolfson Foundation, the Schilling Foundation, R. Lapon, Dita & Yehuda Bronicki, and by the Helmholtz association.
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