Archiv 2016

Gastgeber: Nina Rohringer Ort: CFEL (Bldg. 99)

Exploring molecular strong field ionization with ahybrid coupled channels approach

CFEL Theory Seminar
Molecular strong field ionization (SFI)is at the heart of several ultrafast imaging/spectroscopic techniques such aslaser induced electron diffraction and high harmonic spectroscopy. Whileproof-of-principle experiments are underway, it is still a long way before theycan evolve into a standard imaging techniques. The coupled motion of electronsand nuclei under the influence of a non-perturbative external laser field isnot fully understood yet and there is a strong demand for developing many bodymethods that can model these molecular SFI based processes. [mehr]

Structured relativistic electron and neutron vortex beams in intense laser fields

CFEL Theory Seminar
Recent advances in technology and instrumentation have made it possible to generate vortex beams of electrons and neutrons with phase singularities at their cores, where the beam intensity is zero and the phase is undefined. These new types of beams, apart from the spin angular momentum, carry a quantized orbital angular momentum (OAM) along their axes of propagation resulting in a twisted wavefronts, pretty much like quantum tornadoes. The OAM of electron is capable of fundamentally altering the physics of beams and is already being used for application purposes in electron microscopy. [mehr]
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