scholarly journals Bragg-case x-ray dynamical diffraction propagator in SRW: application to thin crystal phase retarders

2020 ◽  
Author(s):  
John P. Sutter ◽  
Oleg Chubar ◽  
Alexey Suvorov ◽  
Christie Nelson ◽  
Kawal Sawhney
Keyword(s):  
Crystal Phase ◽  
Dynamical Diffraction ◽  
X Ray ◽  
Thin Crystal ◽  
Phase Retarders

scholarly journals Spatial displacement of forward-diffracted X-ray beams by perfect crystals

2018 ◽  
Vol 74 (2) ◽  
pp. 75-87
Author(s):  
A. Rodriguez-Fernandez ◽  
V. Esposito ◽  
D. F. Sanchez ◽  
K. D. Finkelstein ◽  
P. Juranic ◽  
...  
Keyword(s):  
Free Electron ◽  
Bragg Reflection ◽  
Diffraction Theory ◽  
Bragg Diffraction ◽  
Transverse Displacement ◽  
Dynamical Diffraction ◽  
X Ray ◽  
Theoretical Predictions ◽  
Thin Crystal ◽  
Good Agreement

Time-delayed, narrow-band echoes generated by forward Bragg diffraction of an X-ray pulse by a perfect thin crystal are exploited for self-seeding at hard X-ray free-electron lasers. Theoretical predictions indicate that the retardation is strictly correlated to a transverse displacement of the echo pulses. This article reports the first experimental observation of the displaced echoes. The displacements are in good agreement with simulations relying on the dynamical diffraction theory. The echo signals are characteristic for a given Bragg reflection, the structure factor and the probed interplane distance. The reported results pave the way to exploiting the signals as an online diagnostic tool for hard X-ray free-electron laser seeding and for dynamical diffraction investigations of strain at the femtosecond timescale.

In Situ X-Ray Diffraction Studies of Crystallization Growth Behavior in ZnO-Bi2O3-B2O3 Glass as a Route to Functional Optical Devices

MRS Advances ◽  
2018 ◽  
Vol 3 (11) ◽  
pp. 563-567 ◽  
Author(s):  
Quentin Altemose ◽  
Katrina Raichle ◽  
Brittani Schnable ◽  
Casey Schwarz ◽  
Myungkoo Kang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Glass Ceramics ◽  
Treatment Temperature ◽  
Crystal Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
In Situ Xrd ◽  
Dsc Measurements ◽  
Transmission Window

ABSTRACTTransparent optical ZnO–Bi2O3–B2O3 (ZBB) glass-ceramics were created by the melt quenching technique. In this work, a melt of the glass containing stoichiometric ratios of Zn/Bi/B and As was studied. Differential scanning calorimeter (DSC) measurements was used to measure the thermal behavior. VIS/NIR transmission measurements were used to determine the transmission window. X-ray diffraction (XRD) was used to determine crystal phase. In this study, we explore new techniques and report a detailed study of in-situ XRD of the ZBB composition in order to correlate nucleation temperature, heat treatment temperature, and heat treatment duration with induced crystal phase.

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