Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 5: Posters Tuesday (Photoionisation, Multi Photon Processes)
A 5.22: Poster
Dienstag, 3. April 2001, 12:30–15:00, AT3
Relativistic electron dynamics in intense crossed laser beams — •Guido R. Mocken, Yousef I. Salamin, and Christoph H. Keitel — Theoretische Quantendynamik, Fakultät für Physik, Universität Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg
We investigate analytically and numerically the dynamics of a single
electron, in vacuum, in the presence of a pair of laser beams [1] crossing
at an arbitrary angle [2].
Our analysis evolves from exact solutions to the relativistic equation of
motion and predicts average acceleration gradients of several TeV/m over
short distances, using laser field intensities of up to 1022
Wcm−2.
Plane-wave fields are employed in our analytic calculations and pulsed
fields are used in our numerical work.
The radiation losses of the accelerated electron are shown to be small but
not negligible and sample emission spectra are given.
Effects on the electron trajectories and electron energy gain due to
departure from the ideal initial conditions, like the existence of a
distribution of initial velocities, off-axis injection, and realistic beam
representation, are studied numerically.
We point out the regime of stability for off-axis injection and find out
that the electron leaves the interaction region with spatially confined
laser beams with energy gain in the GeV range [3].
[1] E. Esarey, P. Sprangle, and J. Krall, Phys. Rev. E 52, 5443
(1995).
[2] Y. I. Salamin and C. H. Keitel, Appl. Phys. Lett. 77, 1082
(2000).
[3] Y. I. Salamin, G. R. Mocken, and C. H. Keitel, Phys. Rev. E
(submitted).