Ultrafast electron diffraction on materials exposed to intense free electron laser pulses

Cortelli, Giorgio (2019) Ultrafast electron diffraction on materials exposed to intense free electron laser pulses. [Laurea magistrale], Università di Bologna, Corso di Studio in Fisica [LM-DM270], Documento ad accesso riservato.
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The advent of Free Electron Lasers (FELs) has opened unprecedented opportunities for the study of transient states of matter. The use of the seeding technique, developed at the FERMI FEL in Trieste (Italy), pushed further the frontier allowing to perform pump-probe experiments with femtosecond time resolution. FELs permit shedding light onto unexplored non-equilibrium dynamics and processes in matter. In this thesis, a pioneering setup for monitoring sub-picosecond atomic structure changes in materials is described. The FEL is used as an isochoric pump while a 100 keV compressed electron bunch is used as a structural probe thus obtaining an ultrafast electron diffraction (UED) facility. Results of a pilot UED experiment on selected samples (gold and diamond) are presented and analysed.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Cortelli, Giorgio
Relatore della tesi
Correlatore della tesi
Corso di studio
Ordinamento Cds
Parole chiave
Free Electron Laser,Ultrafast Electron Diffraction,Ultrafast Melting
Data di discussione della Tesi
25 Ottobre 2019

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