Sub-10-fs Timing for Ultrafast Electron Diffraction with THz-Driven Streak Camera

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Ultrafast electron diffraction (UED) has evolved to be a powerful tool for the study of structural dynamics with subpicosecond temporal resolution and subatomic spatial resolution. Recently, there have been intense research efforts toward femtosecond timing jitter and stability for improving the temporal resolution of UEDs, however, so far there has been no work showing long-term (e.g., >1 h) stable timing for MeV-level UED systems. In this article, a comprehensive timing synchronization method, based on optical-radiofrequency synchronization and THz streaking, is demonstrated to maintain sub-10-fs long-term timing stability for radiofrequency-gun-based MeV-level UED, which results in 5.5 fs root-mean-square timing drift maintained over 4600 s. With high electron energy and low timing drift, the demonstrated capability is an important step toward studying ultrafast phenomena in samples with low scattering power, such as volatile gases and 2D materials.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2021-02
Language
English
Article Type
Article
Citation

LASER & PHOTONICS REVIEWS, v.15, no.2, pp.2000326

ISSN
1863-8880
DOI
10.1002/lpor.202000326
URI
http://hdl.handle.net/10203/281172
Appears in Collection
PH-Journal Papers(저널논문)ME-Journal Papers(저널논문)
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