Acceleration of proton bunches by petawatt chirped radially polarized laser 
pulses

Li, Jian-Xing; Salamin, Yousef I.; Galow, Benjamin J.; Keitel, C. H.

doi:10.1103/PhysRevA.85.063832

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Acceleration of proton bunches by petawatt chirped radially polarized laser pulses

MPS-Authors

Li, Jian-Xing
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

Salamin, Yousef I.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
Department of Physics, American University of Sharjah, POB 26666, Sharjah, United Arab Emirates;

Galow, Benjamin J.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Keitel, C. H.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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http://link.aps.org/doi/10.1103/PhysRevA.85.063832
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Citation

Li, J.-X., Salamin, Y. I., Galow, B. J., & Keitel, C. H. (2012). Acceleration of proton bunches by petawatt chirped radially polarized laser pulses. Physical Review A, 85(6): 063832, pp. 1-12. doi:10.1103/PhysRevA.85.063832.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-7725-E

Abstract

Results from theoretical investigations are presented which show that protons can be accelerated from rest to a few hundred MeV by a 1-PW chirped radially polarized laser pulse of several hundred femtosecond duration and focused to a waist radius comparable to the radiation wavelength. Single-particle calculations are supported by many-particle and particle-in-cell simulations. Compared with laser acceleration by a similar linearly polarized pulse, the gained energies are less, but have better beam quality. For a suitable initial phase, a particle bunch gets accelerated by the axial component Ez of the laser pulse and, initially focused by the transverse electric field component Er. Beam diffraction finally sets in due to the particle-particle Coulomb repulsion, after interaction with the pulse ceases to exist.