scholarly journals Communication: Low-energy free-electron driven molecular engineering: In situ preparation of intrinsically short-lived carbon-carbon covalent dimer of CO

2017 ◽  
Vol 146 (8) ◽  
pp. 081101 ◽  
Author(s):  
Daly Davis ◽  
Y. Sajeev
Keyword(s):  
Free Electron ◽  
Molecular Engineering ◽  
Low Energy ◽  
In Situ Preparation ◽  
Covalent Dimer

Controllable in-situ preparation of high-coverage horizontal TiO2 nanosheet array

2021 ◽  
Vol 765 ◽  
pp. 138284
Author(s):  
Junqi Wang ◽  
Xiaoping Zou ◽  
Jialin Zhu ◽  
Jin Cheng ◽  
Xiao Bai ◽  
...  
Keyword(s):  
High Coverage ◽  
Nanosheet Array ◽  
In Situ Preparation

scholarly journals Measuring the frequency chirp of extreme-ultraviolet free-electron laser pulses by transient absorption spectroscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Thomas Ding ◽  
Marc Rebholz ◽  
Lennart Aufleger ◽  
Maximilian Hartmann ◽  
Veit Stooß ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Transient Absorption ◽  
Extreme Ultraviolet ◽  
Ultrashort Pulses ◽  
Laser Pulses ◽  
Transient Absorption Spectroscopy ◽  
Energy Structure ◽  
Frequency Chirp

AbstractHigh-intensity ultrashort pulses at extreme ultraviolet (XUV) and x-ray photon energies, delivered by state-of-the-art free-electron lasers (FELs), are revolutionizing the field of ultrafast spectroscopy. For crossing the next frontiers of research, precise, reliable and practical photonic tools for the spectro-temporal characterization of the pulses are becoming steadily more important. Here, we experimentally demonstrate a technique for the direct measurement of the frequency chirp of extreme-ultraviolet free-electron laser pulses based on fundamental nonlinear optics. It is implemented in XUV-only pump-probe transient-absorption geometry and provides in-situ information on the time-energy structure of FEL pulses. Using a rate-equation model for the time-dependent absorbance changes of an ionized neon target, we show how the frequency chirp can be directly extracted and quantified from measured data. Since the method does not rely on an additional external field, we expect a widespread implementation at FELs benefiting multiple science fields by in-situ on-target measurement and optimization of FEL-pulse properties.

The facile in situ preparation and characterization of C/FeOF/FeF3 nanocomposites as LIB cathode materials

Ionics ◽  
2017 ◽  
Vol 24 (6) ◽  
pp. 1561-1569 ◽  
Author(s):  
Wanwan Li ◽  
Yue Li ◽  
Minhua Fang ◽  
Xiaolin Yao ◽  
Tingting Li ◽  
...  
Keyword(s):  
Cathode Materials ◽  
In Situ Preparation
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