scholarly journals Ion-ion coincidence studies on multiple ionizations of N2 and O2 molecules irradiated by extreme ultraviolet free-electron laser pulses

2010 ◽  
Vol 132 (20) ◽  
pp. 204305 ◽  
Author(s):  
A. Yamada ◽  
H. Fukuzawa ◽  
K. Motomura ◽  
X.-J. Liu ◽  
L. Foucar ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Extreme Ultraviolet ◽  
Laser Pulses

Generation and measurement of intense few-femtosecond superradiant extreme-ultraviolet free-electron laser pulses

2021 ◽  
Author(s):  
Najmeh S. Mirian ◽  
Michele Di Fraia ◽  
Simone Spampinati ◽  
Filippo Sottocorona ◽  
Enrico Allaria ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Extreme Ultraviolet ◽  
Laser Pulses

scholarly journals Measuring the frequency chirp of extreme-ultraviolet free-electron laser pulses by transient absorption spectroscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Thomas Ding ◽  
Marc Rebholz ◽  
Lennart Aufleger ◽  
Maximilian Hartmann ◽  
Veit Stooß ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Ultrashort Pulses ◽  
Laser Pulses ◽  
Transient Absorption Spectroscopy ◽  
Energy Structure ◽  
Frequency Chirp

AbstractHigh-intensity ultrashort pulses at extreme ultraviolet (XUV) and x-ray photon energies, delivered by state-of-the-art free-electron lasers (FELs), are revolutionizing the field of ultrafast spectroscopy. For crossing the next frontiers of research, precise, reliable and practical photonic tools for the spectro-temporal characterization of the pulses are becoming steadily more important. Here, we experimentally demonstrate a technique for the direct measurement of the frequency chirp of extreme-ultraviolet free-electron laser pulses based on fundamental nonlinear optics. It is implemented in XUV-only pump-probe transient-absorption geometry and provides in-situ information on the time-energy structure of FEL pulses. Using a rate-equation model for the time-dependent absorbance changes of an ionized neon target, we show how the frequency chirp can be directly extracted and quantified from measured data. Since the method does not rely on an additional external field, we expect a widespread implementation at FELs benefiting multiple science fields by in-situ on-target measurement and optimization of FEL-pulse properties.

scholarly journals All-optical single shot complete electric field measurement of extreme ultraviolet free electron laser pulses

Optica ◽  
2021 ◽  
Author(s):  
William Peters ◽  
Travis Jones ◽  
Anatoly Efimov ◽  
Emanuele Pedersoli ◽  
Laura Foglia ◽  
...  
Keyword(s):  
Electric Field ◽  
Free Electron ◽  
Field Measurement ◽  
Free Electron Laser ◽  
Extreme Ultraviolet ◽  
Laser Pulses ◽  
Single Shot ◽  
Electric Field Measurement ◽  
All Optical

scholarly journals Multiple Ionization of Free Ubiquitin Molecular Ions in Extreme Ultraviolet Free-Electron Laser Pulses

2016 ◽  
Vol 128 (36) ◽  
pp. 10899-10903
Author(s):  
Thomas Schlathölter ◽  
Geert Reitsma ◽  
Dmitrii Egorov ◽  
Olmo Gonzalez-Magaña ◽  
Sadia Bari ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Extreme Ultraviolet ◽  
Laser Pulses ◽  
Molecular Ions ◽  
Multiple Ionization ◽  
Free Ubiquitin

scholarly journals Multiple Ionization of Free Ubiquitin Molecular Ions in Extreme Ultraviolet Free-Electron Laser Pulses

2016 ◽  
Vol 55 (36) ◽  
pp. 10741-10745 ◽  
Author(s):  
Thomas Schlathölter ◽  
Geert Reitsma ◽  
Dmitrii Egorov ◽  
Olmo Gonzalez-Magaña ◽  
Sadia Bari ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Extreme Ultraviolet ◽  
Laser Pulses ◽  
Molecular Ions ◽  
Multiple Ionization ◽  
Free Ubiquitin

Timing methodologies and studies at the FERMI free-electron laser

2018 ◽  
Vol 25 (1) ◽  
pp. 44-51 ◽  
Author(s):  
Riccardo Mincigrucci ◽  
Filippo Bencivenga ◽  
Emiliano Principi ◽  
Flavio Capotondi ◽  
Laura Foglia ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Electronic Effect ◽  
Extreme Ultraviolet ◽  
Laser Pulses ◽  
Time Resolved ◽  
New Era ◽  
Condensed Materials ◽  
Optical Laser ◽  
Partial Depletion

Time-resolved investigations have begun a new era of chemistry and physics, enabling the monitoring in real time of the dynamics of chemical reactions and matter. Induced transient optical absorption is a basic ultrafast electronic effect, originated by a partial depletion of the valence band, that can be triggered by exposing insulators and semiconductors to sub-picosecond extreme-ultraviolet pulses. Besides its scientific and fundamental implications, this process is very important as it is routinely applied in free-electron laser (FEL) facilities to achieve the temporal superposition between FEL and optical laser pulses with tens of femtoseconds accuracy. Here, a set of methodologies developed at the FERMI facility based on ultrafast effects in condensed materials and employed to effectively determine the FEL/laser cross correlation are presented.

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