scholarly journals Femtosecond gas-phase mega-electron-volt ultrafast electron diffraction

2019 ◽  
Vol 6 (5) ◽  
pp. 054305 ◽  
Author(s):  
X. Shen ◽  
J. P. F. Nunes ◽  
J. Yang ◽  
R. K. Jobe ◽  
R. K. Li ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Gas Phase ◽  
Ultrafast Electron Diffraction ◽  
Electron Volt

scholarly journals Liquid-phase mega-electron-volt ultrafast electron diffraction

2021 ◽  
Author(s):  
Joao Pedro Figueira Nunes ◽  
Kathryn Ledbetter ◽  
Ming-Fu Lin ◽  
Michael Kozina ◽  
Elisa Biasin ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Electron Diffraction ◽  
Ultrafast Electron Diffraction ◽  
Electron Volt

Diffraction, crystallography and microscopy beyond three dimensions: structural dynamics in space and time

2004 ◽  
Vol 363 (1827) ◽  
pp. 315-329 ◽  
Author(s):  
Ahmed H. Zewail
Keyword(s):  
Electron Microscopy ◽  
Electron Diffraction ◽  
Gas Phase ◽  
Structural Dynamics ◽  
Research Area ◽  
Three Dimensions ◽  
Ultrafast Electron Diffraction ◽  
Major Research ◽  
Condensed Media ◽  
Recent Developments

In this article we highlight recent developments of ultrafast electron diffraction and crystallography at Caltech. These developments have made it possible to resolve transient structures, both spatially (0.01 Å) and temporally (picosecond and now femtosecond), in the gas phase and condensed media—surfaces, interfaces, and crystals—with wide-ranging applications. With the extension to ultrafast electron microscopy, discussed here and elsewhere, we present an overview of one major research area at our centre, the Laboratory for Molecular Sciences.

scholarly journals A novel nondestructive diagnostic method for mega-electron-volt ultrafast electron diffraction

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Xi Yang ◽  
Junjie Li ◽  
Mikhail Fedurin ◽  
Victor Smaluk ◽  
Lihua Yu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Diffraction ◽  
Diffraction Pattern ◽  
Real Time ◽  
Beam Energy ◽  
Energy Spread ◽  
Radial Mode ◽  
Electron Beam Energy ◽  
Ultrafast Electron Diffraction ◽  
Electron Volt

AbstractA real-time, nondestructive, Bragg-diffracted electron beam energy, energy-spread and spatial-pointing jitter monitor is experimentally verified by encoding the electron beam energy and spatial-pointing jitter information into the mega-electron-volt ultrafast electron diffraction pattern. The shot-to-shot fluctuation of the diffraction pattern is then decomposed to two basic modes, i.e., the distance between the Bragg peaks as well as its variation (radial mode) and the overall lateral shift of the whole pattern (drift mode). Since these two modes are completely decoupled, the Bragg-diffraction method can simultaneously measure the shot-to-shot energy fluctuation from the radial mode with 2·10−4 precision and spatial-pointing jitter from the drift mode having wide measurement span covering energy jitter range from 10−4 to 10−1. The key advantage of this method is that it allows us to extract the electron beam energy spread concurrently with the ongoing experiment and enables online optimization of the electron beam especially for future high charge single-shot ultrafast electron diffraction (UED) and ultrafast electron microscopy (UEM) experiments. Furthermore, real-time energy measurement enables the filtering process to remove off-energy shots, improving the resolution of time-resolved UED. As a result, this method can be applied to the entire UED user community, beyond the traditional electron beam diagnostics of accelerators used by accelerator physicists.

scholarly journals A terahertz pump mega-electron-volt ultrafast electron diffraction probe apparatus at the SLAC Accelerator Structure Test Area facility

2018 ◽  
Vol 13 (06) ◽  
pp. P06014-P06014 ◽  
Author(s):  
B.K. Ofori-Okai ◽  
M.C. Hoffmann ◽  
A.H. Reid ◽  
S. Edstrom ◽  
R.K. Jobe ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Test Area ◽  
Ultrafast Electron Diffraction ◽  
Electron Volt ◽  
Structure Test

Relativistic ultrafast electron diffraction from molecules in the gas phase (Conference Presentation)

2016 ◽  
Author(s):  
Jie Yang ◽  
Markus Guehr ◽  
Theodore Vecchione ◽  
Matthew S. Robinson ◽  
Renkai Li ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Gas Phase ◽  
Ultrafast Electron Diffraction

scholarly journals Liquid-phase mega-electron-volt ultrafast electron diffraction

2020 ◽  
Vol 7 (2) ◽  
pp. 024301 ◽  
Author(s):  
J. P. F. Nunes ◽  
K. Ledbetter ◽  
M. Lin ◽  
M. Kozina ◽  
D. P. DePonte ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Electron Diffraction ◽  
Ultrafast Electron Diffraction ◽  
Electron Volt
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