scholarly journals Multiple ionization and fragmentation dynamics of molecular iodine studied in IR–XUV pump–probe experiments

2014 ◽  
Vol 171 ◽  
pp. 41-56 ◽  
Author(s):  
K. Schnorr ◽  
A. Senftleben ◽  
G. Schmid ◽  
A. Rudenko ◽  
M. Kurka ◽  
...  
Keyword(s):  
Free Electron Laser ◽  
Molecular Iodine ◽  
Photon Absorption ◽  
Molecular Fragments ◽  
Pump Probe ◽  
Molecular Fragmentation ◽  
Light Pulses ◽  
Multiple Ionization ◽  
Fragmentation Dynamics ◽  
Optical Laser

The ionization and fragmentation dynamics of iodine molecules (I2) are traced using very intense (∼1014 W cm−2) ultra-short (∼60 fs) light pulses with 87 eV photons of the Free-electron LASer at Hamburg (FLASH) in combination with a synchronized femtosecond optical laser. Within a pump–probe scheme the IR pulse initiates a molecular fragmentation and then, after an adjustable time delay, the system is exposed to an intense FEL pulse. This way we follow the creation of highly-charged molecular fragments as a function of time, and probe the dynamics of multi-photon absorption during the transition from a molecule to individual atoms.

Software for the data analysis of the arrival-timing monitor at SACLA

2018 ◽  
Vol 25 (2) ◽  
pp. 592-603 ◽  
Author(s):  
Kyo Nakajima ◽  
Yasumasa Joti ◽  
Tetsuo Katayama ◽  
Shigeki Owada ◽  
Tadashi Togashi ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Laser Pulses ◽  
Pump Probe ◽  
Network Connection ◽  
Online Tools ◽  
Timing Data ◽  
Arrival Timing ◽  
Optical Laser ◽  
Analysis Environment

X-ray free-electron laser (XFEL) pulses from SPring-8 Ångstrom Compact free-electron LAser (SACLA) with a temporal duration of <10 fs have provided a variety of benefits in scientific research. In a previous study, an arrival-timing monitor was developed to improve the temporal resolution in pump–probe experiments at beamline 3 by rearranging data in the order of the arrival-timing jitter between the XFEL and the synchronized optical laser pulses. This paper presentsTiming Monitor Analyzer (TMA), a software package by which users can conveniently obtain arrival-timing data in the analysis environment at SACLA. The package is composed of offline tools that pull stored data from cache storage, and online tools that pull data from a data-handling server in semi-real time during beam time. Users can select the most suitable tool for their purpose, and share the results through a network connection between the offline and online analysis environments.

scholarly journals Observation of a highly conductive warm dense state of water with ultrafast pump–probe free-electron-laser measurements

2021 ◽  
Vol 6 (5) ◽  
pp. 054401
Author(s):  
Z. Chen ◽  
X. Na ◽  
C. B. Curry ◽  
S. Liang ◽  
M. French ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Pump Probe ◽  
Laser Measurements ◽  
State Of Water ◽  
Dense State

scholarly journals Double chirp-taper x-ray free-electron laser for attosecond pump-probe experiments

2019 ◽  
Vol 22 (5) ◽  
Author(s):  
Zhen Zhang ◽  
Joseph Duris ◽  
James P. MacArthur ◽  
Zhirong Huang ◽  
Agostino Marinelli
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Pump Probe ◽  
X Ray

Free-electron laser studies of direct and indirect two-photon absorption in germanium

1993 ◽  
Vol 70 (26) ◽  
pp. 4146-4149 ◽  
Author(s):  
E. Tuncel ◽  
J. L. Staehli ◽  
C. Coluzza ◽  
G. Margaritondo ◽  
J. T. McKinley ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Demonstration of Transmission Mode Soft X-ray NEXAFS Using Third- and Fifth-Order Harmonics of FEL Radiation at SACLA BL1

2020 ◽  
Vol 10 (21) ◽  
pp. 7852
Author(s):  
Hiroshi Iwayama ◽  
Masanari Nagasaka ◽  
Ichiro Inoue ◽  
Shigeki Owada ◽  
Makina Yabashi ◽  
...  
Keyword(s):  
Fine Structure ◽  
Free Electron ◽  
Free Electron Laser ◽  
Transmission Mode ◽  
Pump Probe ◽  
X Ray ◽  
The Third ◽  
Nexafs Spectroscopy ◽  
Fifth Order ◽  
X Ray Absorption

We demonstrate the applicability of third- and fifth-order harmonics of free-electron laser (FEL) radiation for soft X-ray absorption spectroscopy in the transmission mode at SACLA BL1, which covers a photon energy range of 20 to 150 eV in the fundamental FEL radiation. By using the third- and fifth-order harmonics of the FEL radiation, we successfully recorded near-edge X-ray absorption fine structure (NEXAFS) spectra for Ar 2p core ionization and CO2 C 1s and O 1s core ionizations. Our results show that the utilization of third- and fifth-order harmonics can significantly extend the available photon energies for NEXAFS spectroscopy using an FEL and opens the door to femtosecond pump-probe NEXAFS using a soft X-ray FEL.

Ultrafast pump-probe and time-resolved fluorescence anisotropy study of the intramolecular interaction of branched styryl derivatives based on 1,3,5-triazine

2019 ◽  
Vol 28 (01) ◽  
pp. 1950003 ◽  
Author(s):  
Yaochuan Wang ◽  
Yizhuo Wang ◽  
Guiqiu Wang ◽  
Dajun Liu
Keyword(s):  
Fluorescence Anisotropy ◽  
Intramolecular Interaction ◽  
Intramolecular Interactions ◽  
Photon Absorption ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Property Measurement

A series of branched styryl derivatives based on 1,3,5-triazine were studied by nonlinear optical property measurement, degenerated pump-probe, and time-resolved fluorescence anisotropy methods to elucidate the two-photon absorption (TPA) properties and intramolecular interactions between branches. Significant enhancement of the TPA cross-section was observed in multi-branched derivatives. The anisotropy of multi-branched compounds shows faster decay and small residual values, indicating strong intramolecular interactions between branches, which further confirmed the TPA enhancement mechanism.

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