scholarly journals Superfluorescence, Free-Induction Decay, and Four-Wave Mixing: Propagation of Free-Electron Laser Pulses through a Dense Sample of Helium Ions

2018 ◽  
Vol 121 (26) ◽  
Author(s):  
James R. Harries ◽  
Hiroshi Iwayama ◽  
Susumu Kuma ◽  
Masatomi Iizawa ◽  
Norihiro Suzuki ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Free Induction Decay ◽  
Laser Pulses ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Helium Ions ◽  
Free Induction

Observation of Free Induction Decay Signals of OH Radicals Excited by Terahertz Free-Electron Laser Pulses

2019 ◽  
Vol 55 (1) ◽  
pp. 18-22 ◽  
Author(s):  
E. N. Chesnokov ◽  
L. N. Krasnoperov ◽  
V. V. Kubarev ◽  
P. V. Koshlyakov
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Free Induction Decay ◽  
Laser Pulses ◽  
Oh Radicals ◽  
Free Induction

Experimental setups for FEL-based four-wave mixing experiments at FERMI

2016 ◽  
Vol 23 (1) ◽  
pp. 132-140 ◽  
Author(s):  
Filippo Bencivenga ◽  
Marco Zangrando ◽  
Cristian Svetina ◽  
Alessandro Abrami ◽  
Andrea Battistoni ◽  
...  
Keyword(s):  
Excited State ◽  
Inelastic Scattering ◽  
Free Electron ◽  
Free Electron Laser ◽  
Scientific Community ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Experimental Facilities ◽  
Near Future ◽  
Experimental Strategies

The recent advent of free-electron laser (FEL) sources is driving the scientific community to extend table-top laser research to shorter wavelengths adding elemental selectivity and chemical state specificity. Both a compact setup (mini-TIMER) and a separate instrument (EIS-TIMER) dedicated to four-wave-mixing (FWM) experiments has been designed and constructed, to be operated as a branch of the Elastic and Inelastic Scattering beamline: EIS. The FWM experiments that are planned at EIS-TIMER are based on the transient grating approach, where two crossed FEL pulses create a controlled modulation of the sample excitations while a third time-delayed pulse is used to monitor the dynamics of the excited state. This manuscript describes such experimental facilities, showing the preliminary results of the commissioning of the EIS-TIMER beamline, and discusses original experimental strategies being developed to study the dynamics of matter at the fs–nm time–length scales. In the near future such experimental tools will allow more sophisticated FEL-based FWM applications, that also include the use of multiple and multi-color FEL pulses.

Cascaded free-induction decay four-wave mixing

2001 ◽  
Vol 266 (2-3) ◽  
pp. 205-212 ◽  
Author(s):  
Vadim V. Lozovoy ◽  
Igor Pastirk ◽  
Matthew G. Comstock ◽  
Marcos Dantus
Keyword(s):  
Free Induction Decay ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Free Induction

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 Single- and two-color attosecond hard x-ray free-electron laser pulses with nonlinear compression

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Alexander Malyzhenkov ◽  
Yunieski P. Arbelo ◽  
Paolo Craievich ◽  
Philipp Dijkstal ◽  
Eugenio Ferrari ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Laser Pulses ◽  
X Ray ◽  
Nonlinear Compression

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.

Charge and Nuclear Dynamics Induced by Deep Inner-Shell Multiphoton Ionization of CH3I Molecules by Intense X-ray Free-Electron Laser Pulses

2015 ◽  
Vol 6 (15) ◽  
pp. 2944-2949 ◽  
Author(s):  
Koji Motomura ◽  
Edwin Kukk ◽  
Hironobu Fukuzawa ◽  
Shin-ichi Wada ◽  
Kiyonobu Nagaya ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Multiphoton Ionization ◽  
Laser Pulses ◽  
Nuclear Dynamics ◽  
X Ray
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