scholarly journals URSA-PQ: A Mobile and Flexible Pump-Probe Instrument for Gas Phase Samples at the FLASH Free Electron Laser

2020 ◽  
Vol 10 (21) ◽  
pp. 7882
Author(s):  
Jan Metje ◽  
Fabiano Lever ◽  
Dennis Mayer ◽  
Richard James Squibb ◽  
Matthew S. Robinson ◽  
...  
Keyword(s):  
Gas Phase ◽  
Time Resolution ◽  
Laser Pulses ◽  
Pump Probe ◽  
X Ray ◽  
Wide Range ◽  
Technical Features ◽  
Magnetic Bottle ◽  
Probe Spectroscopy ◽  
Different Origins

We present a highly flexible and portable instrument to perform pump-probe spectroscopy with an optical and an X-ray pulse in the gas phase. The so-called URSA-PQ (German for ‘Ultraschnelle Röntgenspektroskopie zur Abfrage der Photoenergiekonversion an Quantensystemen’, Engl. ‘ultrafast X-ray spectroscopy for probing photoenergy conversion in quantum systems’) instrument is equipped with a magnetic bottle electron spectrometer (MBES) and tools to characterize the spatial and temporal overlap of optical and X-ray laser pulses. Its adherence to the CAMP instrument dimensions allows for a wide range of sample sources as well as other spectrometers to be included in the setup. We present the main design and technical features of the instrument. The MBES performance was evaluated using Kr M4,5NN Auger lines using backfilled Kr gas, with an energy resolution ΔE/E ≅ 1/40 in the integrating operative mode. The time resolution of the setup at FLASH 2 FL 24 has been characterized with the help of an experiment on 2-thiouracil that is inserted via the instruments’ capillary oven. We find a time resolution of 190 fs using the molecular 2p photoline shift and attribute this to different origins in the UV-pump—the X-ray probe setup.

scholarly journals First steps towards time-resolved 'in-house' X-ray diffraction experiments

2014 ◽  
Vol 70 (a1) ◽  
pp. C775-C775 ◽  
Author(s):  
Radoslaw Kaminski ◽  
Jason Benedict ◽  
Elzbieta Trzop ◽  
Katarzyna Jarzembska ◽  
Bertrand Fournier ◽  
...  
Keyword(s):  
Excited State ◽  
Time Resolution ◽  
Structural Changes ◽  
Laser Pulses ◽  
High Repetition Rate ◽  
X Ray Diffraction ◽  
Laboratory Equipment ◽  
Time Resolved ◽  
X Ray ◽  
Ligand Charge Transfer

High-intensity X-ray sources, such as synchrotrons or X-ray free electron lasers, providing up to 100 ps time-resolution allow for studying very short-lived excited electronic states in molecular crystals. Some recent examples constitute investigations of Rh...Rh bond shortening,[1] or metal-to-ligand charge transfer processes in CuI complexes.[2] Nevertheless, in cases in which the lifetime of excited state species exceeds 10 μs it is now possible, due to the dramatic increase in the brightness of X-ray sources and the sensitivity of detectors, to use laboratory equipment to explore structural changes upon excitation. Consequently, in this contribution we present detailed technical description of the 'in-house' X-ray diffraction setup allowing for the laser-pump X-ray-probe experiments within the time-resolution at the order of 10 μs or larger. The experimental setup consists of a modified Bruker Mo-rotating-anode diffractometer, coupled with the high-frequency Nd:YAG laser (λ = 355 nm). The required synchronization of the laser pulses and the X-ray beam is realized via the optical chopper mounted across the beam-path. Chopper and laser capabilities enable high-repetition-rate experiments reaching up to 100 kHz. In addition, the laser shutter is being directly controlled though the original diffractometer software, allowing for collection of the data in a similar manner as done at the synchrotron (alternating light-ON & light-OFF frames). The laser beam itself is split into two allowing for improved uniform light delivery onto the crystal specimen. The designed setup was tested on the chosen set of crystals exhibiting rather long-lived excited state, such as, the Cu2Br2L2 (L = C5H4N-NMe2) complex, for which the determined lifetime is about 100 μs at 90 K. The results shall be presented. Research is funded by the National Science Foundation (CHE1213223). KNJ is supported by the Polish Ministry of Science and Higher Education through the "Mobility Plus" program.

Picosecond X-ray Diffraction: System and Applications

1994 ◽  
Vol 38 ◽  
pp. 21-33
Author(s):  
I. V. Tomov ◽  
P. Chen ◽  
P. M. Rentzepis
Keyword(s):  
Heat Transport ◽  
Time Resolution ◽  
Laser Pulses ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Silicon Crystals ◽  
193 Nm ◽  
Gold Platinum

Abstract We report the development of a novel, pulsed x-ray diffraction system with picosecond time resolution. The system has been used to study the heat transport in gold, platinum and silicon crystals heated by 10 ps, 193 nm laser pulses. Further developments and applications of time resolved picosecond x-ray diffraction are discussed.

Proton Transfer Mediated by the Vibronic Coupling in Oxygen Core Ionized States of Glyoxalmonoxime Studied by Infrared−X-ray Pump−Probe Spectroscopy

2006 ◽  
Vol 110 (47) ◽  
pp. 12805-12813 ◽  
Author(s):  
V. C. Felicíssimo ◽  
F. F. Guimarães ◽  
A. Cesar ◽  
F. Gel'mukhanov ◽  
H. Ågren
Keyword(s):  
Proton Transfer ◽  
Vibronic Coupling ◽  
Pump Probe ◽  
X Ray ◽  
Probe Spectroscopy

scholarly journals Observation of femtosecond molecular dynamics via pump–probe gas phase x-ray scattering

2016 ◽  
Vol 49 (3) ◽  
pp. 034001 ◽  
Author(s):  
J M Budarz ◽  
M P Minitti ◽  
D V Cofer-Shabica ◽  
B Stankus ◽  
A Kirrander ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Gas Phase ◽  
Pump Probe ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Infrared–x-ray pump-probe spectroscopy of the NO molecule

2005 ◽  
Vol 72 (1) ◽  
Author(s):  
F. F. Guimarães ◽  
V. Kimberg ◽  
V. C. Felicíssimo ◽  
F. Gel’mukhanov ◽  
A. Cesar ◽  
...  
Keyword(s):  
Pump Probe ◽  
X Ray ◽  
Probe Spectroscopy

scholarly journals Construction of a magnetic bottle spectrometer and its application to pulse duration measurement of X-ray laser using a pump-probe method

AIP Advances ◽  
2015 ◽  
Vol 5 (11) ◽  
pp. 117101 ◽  
Author(s):  
S. Namba ◽  
N. Hasegawa ◽  
M. Kishimoto ◽  
M. Nishikino ◽  
M. Ishino ◽  
...  
Keyword(s):  
Pulse Duration ◽  
Probe Method ◽  
Pump Probe ◽  
X Ray ◽  
Magnetic Bottle

The photodissociation dynamics of o-, m- and p-bromotoluene in the gas phase studied with femtosecond pump–probe spectroscopy

2004 ◽  
Vol 384 (1-3) ◽  
pp. 35-39 ◽  
Author(s):  
M. Kadi ◽  
E. Ivarsson ◽  
J. Davidsson
Keyword(s):  
Gas Phase ◽  
Pump Probe ◽  
Probe Spectroscopy

scholarly journals Reaction microscope endstation at FLASH2

2019 ◽  
Vol 26 (3) ◽  
pp. 854-867 ◽  
Author(s):  
Georg Schmid ◽  
Kirsten Schnorr ◽  
Sven Augustin ◽  
Severin Meister ◽  
Hannes Lindenblatt ◽  
...  
Keyword(s):  
Gas Phase ◽  
Extreme Ultraviolet ◽  
Time Resolved ◽  
Pump Probe ◽  
Natural Time ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Probe Spectroscopy ◽  
Small Clusters ◽  
Reaction Microscope

A reaction microscope dedicated to multi-particle coincidence spectroscopy on gas-phase samples is installed at beamline FL26 of the free-electron laser FLASH2 in Hamburg. The main goals of the instrument are to follow the dynamics of atoms, molecules and small clusters on their natural time-scale and to study non-linear light–matter interaction with such systems. To this end, the reaction microscope is combined with an in-line extreme-ultraviolet (XUV) split-delay and focusing optics, which allows time-resolved XUV-XUV pump–probe spectroscopy to be performed.

The principles of infrared-x-ray pump-probe spectroscopy. Applications on proton transfer in core-ionized water dimers

2005 ◽  
Vol 122 (9) ◽  
pp. 094319 ◽  
Author(s):  
V. C. Felicíssimo ◽  
F. F. Guimarães ◽  
F. Gel’mukhanov ◽  
A. Cesar ◽  
H. Ågren
Keyword(s):  
Proton Transfer ◽  
Pump Probe ◽  
X Ray ◽  
Probe Spectroscopy ◽  
Water Dimers
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