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  Charged particle beam transport in a flying focus pulse with orbital angular momentum

Formanek, M., Palastro, J. P., Vranic, M., Ramsey, D., & Di Piazza, A. (2023). Charged particle beam transport in a flying focus pulse with orbital angular momentum. Physical Review E, 107(5): 055213. doi:10.1103/PhysRevE.107.055213.

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2301.08186.pdf (Preprint), 2MB
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 Creators:
Formanek, Martin1, 2, Author           
Palastro, John P.3, Author
Vranic, Marija4, Author
Ramsey, Dillon3, Author
Di Piazza, Antonino1, Author           
Affiliations:
1Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society, ou_904546              
2ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, 252 41 Dolní Břežany, Czech Republic, ou_persistent22              
3Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA, ou_persistent22              
4GOLP/Instituto de Plasma e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal, ou_persistent22              

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Free keywords: Physics, Plasma Physics, physics.plasm-ph, Physics, Accelerator Physics, physics.acc-ph
 MPINP: Research group A. Di Piazza – Division C. H. Keitel
 Abstract: We demonstrate the capability of flying focus (FF) laser pulses with ℓ=1
orbital angular momentum (OAM) to transversely confine ultrarelativistic charged particle bunches over macroscopic distances while maintaining a tight bunch radius. A FF pulse with

=
1
OAM creates a radial ponderomotive barrier that constrains the transverse motion of particles and travels with the bunch over extended distances. As compared with freely propagating bunches, which quickly diverge due to their initial momentum spread, the particles cotraveling with the ponderomotive barrier slowly oscillate around the laser pulse axis within the spot size of the pulse. This can be achieved at FF pulse energies that are orders of magnitude lower than required by Gaussian or Bessel pulses with OAM. The ponderomotive trapping is further enhanced by radiative cooling of the bunch resulting from rapid oscillations of the charged particles in the laser field. This cooling decreases the mean-square radius and emittance of the bunch during propagation.

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 Dates: 2023-05-23
 Publication Status: Published online
 Pages: 17 pages, 9 figures
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 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2301.08186
DOI: 10.1103/PhysRevE.107.055213
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Title: Physical Review E
  Other : Phys. Rev. E
Source Genre: Journal
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Publ. Info: Melville, NY : American Physical Society
Pages: 15 Volume / Issue: 107 (5) Sequence Number: 055213 Start / End Page: - Identifier: ISSN: 1539-3755
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012