|
Identifier |
000381535 |
Title |
Strongly driven multielectron processes under X-ray radiation |
Alternative Title |
Ισχυρά καθοδηγούμενες πολυηλεκτρονιακές διεργασίες υπό την επίδραση ακτινοβολίας ακτίνων-Χ |
Author
|
Μαρκέλλος, Δημήτριος
|
Thesis advisor
|
Ζώτος, Ξενοφών
Λαμπρόπουλος, Παναγιώτης
|
Reviewer
|
Φλυτζάνης, Νικόλαος
Νικολόπουλος, Γεώργιος
|
Abstract |
In the past several theoretical papers were published about the interaction of
atoms with photons in the spectral area between extreme UV and soft X-rays.
Nowadays with the generation of the free-electron facilities, in particular in
Hamburg experimentalists are able to implement ideal experiments with beams
that have extremely high intensities. As a result the playground of atoms in
strong fields comes to the forefront. Also, a theoretical scrutiny should take care
of the fluctuations of the generated FEL pulses thus in general the modelling of
such effects is needed. In the following work we are exploring the bi-chromatic
interaction of an FEL and an IR or a visible laser with atomic Krypton. For the
first part we are motivated from a recent paper (1) thus we generate more
detailed theoretical results choosing freely the parameters needed such as the
pulse durations or the intensities of the lasers. In order to explore the behavior
of this atom we deal with the Auger decay, which is a decay mechanism similar
to the auto-ionization. Also, it is necessary to work with the density matrix
formalism as we want to calculate the profiles of resonances. In the second
part, we examine if the electromagnetically induced transparency is observable
under specific conditions and atomic structures of Krypton. It is a rather
interesting phenomenon first observed by Harris and his co-workers around
1991. In both projects we solve numerically a few sets of differential equations
which have not analytical solutions due to the intricate interplay of several nonlinearities.
|
Language |
English |
Subject |
Electromagnetic induced transparency |
|
Multiphoton and Multielectron processes |
|
Strong coupling |
|
Ηλεκτρομαγνητικά επαγώμενη διαφάνεια |
|
Μη γραμμικές διαδικασίες |
|
Πολυφωτονικές |
Issue date |
2013-11-15 |
Collection
|
School/Department--School of Sciences and Engineering--Department of Physics--Post-graduate theses
|
|
Type of Work--Post-graduate theses
|
Views |
595 |