Experimental demonstration of high quality MeV ultrafast electron diffraction

The simulation optimization and an experimental demonstration of improved performances of mega-electron-volt ultrafast electron diffraction (MeV UED) are reported in this paper. Using ultrashort high quality electron pulses from an S -band photocathode rf gun and a polycrystalline aluminum foil as t...

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Bibliographic Details
Published in:Review of scientific instruments 2009-08, Vol.80 (8), p.083303-083303-4
Main Authors: Li, Renkai, Tang, Chuanxiang, Du, Yingchao, Huang, Wenhui, Du, Qiang, Shi, Jiaru, Yan, Lixin, Wang, Xijie
Format: Article
Language:English
Subjects:
ALUMINIUM
Aluminum Compounds - chemistry
Computer Simulation
ELECTRON DIFFRACTION
ELECTRON GUNS
ELECTRONS
Kinetics
Lasers
OPTIMIZATION
OTHER INSTRUMENTATION
PHOTOCATHODES
RESOLUTION
Scattering, Radiation
SIMULATION
SPATIAL RESOLUTION
Time Factors
Ultraviolet Rays
X-Ray Diffraction - instrumentation
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Summary:The simulation optimization and an experimental demonstration of improved performances of mega-electron-volt ultrafast electron diffraction (MeV UED) are reported in this paper. Using ultrashort high quality electron pulses from an S -band photocathode rf gun and a polycrystalline aluminum foil as the sample, we experimentally demonstrated an improved spatial resolution of MeV UED, in which the Debye-Scherrer rings of the (111) and (200) planes were clearly resolved. This result showed that MeV UED is capable to achieve an atomic level spatial resolution and a ∼ 100   fs temporal resolution simultaneously, and will be a unique tool for ultrafast structural dynamics studies.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.3194047