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Spontaneous emergence of non-planar electron orbits during direct laser acceleration by a linearly polarized laser pulse | | A. V. Arefiev
; V. N. Khudik
; A. P. L. Robinson
; G. Shvets
; L. Willingale
; | | Date: |
20 Oct 2015 | | Abstract: | An electron irradiated by a linearly polarized relativistic intensity laser
pulse in a cylindrical plasma channel can gain significant energy from the
pulse. The laser electric and magnetic fields drive electron oscillations in a
plane making it natural to expect the electron trajectory to be flat. We show
that strong modulations of the relativistic $gamma$-factor associated with the
energy enhancement cause the free oscillations perpendicular to the plane of
the driven motion to become unstable. As a consequence, out of plane
displacements grow to become comparable to the amplitude of the driven
oscillations and the electron trajectory becomes essentially three-dimensional,
even if at an early stage of the acceleration it was flat. The development of
the instability profoundly affects the x-ray emission, causing considerable
divergence of the radiation perpendicular to the plane of the driven
oscillations, while also reducing the overall emitted energy. | | Source: | arXiv, 1510.5764 | | Services: | Forum | Review | PDF | Favorites | |
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