Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 16: Collisions, scattering and correlation phenomena II
A 16.7: Vortrag
Dienstag, 1. März 2016, 16:15–16:30, f142
Scattering Processes with Relativistic Twisted Electrons: Mott– and Compton Scattering — •Daniel Seipt1,2, Stephan Fritzsche1,2, Andrey Surzhykov1, Valery G. Serbo3, and Igor P. Ivanov4 — 1Helmholtz-Institut Jena — 2Friedrich-Schiller-Universität Jena — 3Novosibirsk State University — 4CFTP, Instituto Superior Tecnico, University of Lisbon
Twisted electrons, also known as electron vortex beams, are novel types of electron beams characterized by a well defined projection of total angular momentum onto their beam axis. We investigate two different fundamental scattering processes involving high–energetic twisted electrons based on Dirac’s relativistic wave equation: Mott scattering of twisted electrons on atoms and the inverse Compton scattering of laser light off twisted electron beams.
For the Mott scattering, special attention is placed on the angular distribution and the polarization of the outgoing electrons. It is shown that the distribution of scattered electrons depends sensitively on the properties of the initial twisted electron states, thus, rendering the Mott scattering a promising diagnostic tool for relativistic vortex beams.
In the process of inverse Compton back-scattering of laser light off ultra-relativistic electrons, the frequency of the photons is Doppler up-shifted to the x-ray regime. We analyze how the characteristics of the backscattered x-ray beam can be controlled by tuning the properties of the twisted electrons, in order to synthesize tailor-made x-ray beam profiles with a well-defined spatial structure.