scholarly journals Effects of x-ray free-electron laser pulse intensity on the Mn Kβ1,3 x-ray emission spectrum in photosystem II—A case study for metalloprotein crystals and solutions

2021 ◽  
Vol 8 (6) ◽  
pp. 064302
Author(s):  
Thomas Fransson ◽  
Roberto Alonso-Mori ◽  
Ruchira Chatterjee ◽  
Mun Hon Cheah ◽  
Mohamed Ibrahim ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Laser Pulse ◽  
Emission Spectrum ◽  
Free Electron ◽  
Free Electron Laser ◽  
X Ray ◽  
Pulse Intensity ◽  
Laser Pulse Intensity

scholarly journals Suppression of resonant auger effect with chirped x-ray free-electron laser pulse

2018 ◽  
Vol 51 (3) ◽  
pp. 035602 ◽  
Author(s):  
Yu-Ping Sun ◽  
Quan Miao ◽  
Ai-Ping Zhou ◽  
Rui-Jin Liu ◽  
Bo Liu ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Free Electron ◽  
Free Electron Laser ◽  
X Ray ◽  
Auger Effect

A photodiode amplifier system for pulse-by-pulse intensity measurement of an x-ray free electron laser

2012 ◽  
Vol 83 (4) ◽  
pp. 043108 ◽  
Author(s):  
Togo Kudo ◽  
Kensuke Tono ◽  
Makina Yabashi ◽  
Tadashi Togashi ◽  
Takahiro Sato ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Intensity Measurement ◽  
X Ray ◽  
Pulse Intensity

Possibility of X-ray pulse compression using an asymmetric or inclined double-crystal monochromator

2013 ◽  
Vol 20 (4) ◽  
pp. 550-554 ◽  
Author(s):  
Jaromir Hrdý ◽  
Peter Oberta
Keyword(s):  
Laser Pulse ◽  
Free Electron ◽  
Free Electron Laser ◽  
Pulse Compression ◽  
Compact Scheme ◽  
Mutual Distance ◽  
Compression Scheme ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator

It is shown theoretically that the asymmetric or inclined double-crystal X-ray monochromator may be used for X-ray pulse compression if the pulse is properly chirped. By adjusting the mutual distance of the two asymmetric or inclined crystals it should be possible to achieve even a sub-femtosecond compression of a chirped free-electron laser pulse. The smalld-spacing of the crystal enables a more compact scheme compared with the currently used grating compression scheme. The asymmetric cut of the crystal enables the acceptance of a larger bandwidth. The inclined cut has larger tunability.

Thermomechanical optimization of the cathode design intended for the X-ray free-electron laser oscillator injector electron gun

2010 ◽  
Vol 1 (MEDSI-6) ◽  
Author(s):  
B. Brajuskovic ◽  
R. Lindberg ◽  
N. Sereno
Keyword(s):  
Thermal Analysis ◽  
Laser Pulse ◽  
Free Electron ◽  
Free Electron Laser ◽  
Thermal Stresses ◽  
Laser Oscillator ◽  
Transient Thermal Analysis ◽  
X Ray ◽  
Cathode Design ◽  
Transient Thermal

The Advanced Photon Source at Argonne National Laboratory is developing a low-emittance thermionic gun for a proposed X-ray free-electron laser oscillator (XFEL-O) that will use a laser pulse-heated cathode. The cathode must operate at or slightly above 1500 °C for several nanoseconds and then cool down several hundred °C in approximately the same amount of time, with a 1-MHz heating–cooling cycle. A transient thermal analysis was performed to optimize the laser pulse shape needed to provide the desired temperature response of the cathode for several possible cathode materials. In addition, thermal stresses developed in the cathode during heating–cooling cycles were analysed. Both transient thermal analysis and thermal stress computations were performed using the ANSYS12 code. The computed temperature distribution and thermal stresses were utilized in the optimization of the cathode design. The results of the analysis are presented.

scholarly journals X-ray multiphoton ionization dynamics of a water molecule irradiated by an x-ray free-electron laser pulse

2016 ◽  
Vol 94 (2) ◽  
Author(s):  
Ludger Inhester ◽  
Kota Hanasaki ◽  
Yajiang Hao ◽  
Sang-Kil Son ◽  
Robin Santra
Keyword(s):  
Laser Pulse ◽  
Water Molecule ◽  
Free Electron ◽  
Free Electron Laser ◽  
Multiphoton Ionization ◽  
X Ray

scholarly journals Simulation of dense aluminum plasma under intense X-rays

2021 ◽  
pp. 1-15
Author(s):  
Dmitrii Andreevich Kim ◽  
Ilia Yurievich Vichev ◽  
Anna Dmitrievna Solomyannaya ◽  
Alexander Sergeevich Grushin
Keyword(s):  
Emission Spectrum ◽  
Free Electron ◽  
Free Electron Laser ◽  
Aluminum Film ◽  
X Rays ◽  
Main Attention ◽  
X Ray ◽  
Aluminum Plasma ◽  
Collisional Radiative Model ◽  
Radiative Model

The THERMOS code was used to calculate the properties of dense photoionized aluminum plasma. The case is based on an experiment carried out at the LCLS, where an aluminum film was irradiated with intense X-ray radiation with a photon energy of 1650 eV using a free-electron laser. The evolution of the aluminum plasma was considered, the populations of states and the emission spectrum were calculated. The main attention was paid to the study of the effects associated with nonstationarity and ionization potentials depression due to high density using collisional-radiative model.

scholarly journals Radiation Damage-Free Structure of Photosystem II Determined by Femtosecond X-Ray Free Electron Laser Pulses

2016 ◽  
Vol 58 (3) ◽  
pp. 126-132
Author(s):  
Michihiro SUGA ◽  
Fusamichi AKITA ◽  
Kenjin SHEN ◽  
Masaki YAMAMOTO ◽  
Hideo AGO
Keyword(s):  
Photosystem Ii ◽  
Radiation Damage ◽  
Free Electron ◽  
Free Electron Laser ◽  
Laser Pulses ◽  
X Ray
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