Ultrafast three-dimensional imaging of lattice dynamics in individual gold nanocrystals
Jesse N. Clark,Loren Beitra,Gang Xiong,Andrew Higginbotham,David Fritz,Henrik T. Lemke,Diling Zhu,M. Chollet,Garth J. Williams,Marc Messerschmidt,Brian Abbey,Ross Harder,Alexander M. Korsunsky,Justin Wark,Ian K. Robinson +14 more
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TLDR
Three-dimensional imaging of the generation and subsequent evolution of coherent acoustic phonons on the picosecond time scale within a single gold nanocrystal by means of an x-ray free-electron laser is reported, providing insights into the physics of this phenomenon.Abstract:
Key insights into the behavior of materials can be gained by observing their structure as they undergo lattice distortion. Laser pulses on the femtosecond time scale can be used to induce disorder in a "pump-probe" experiment with the ensuing transients being probed stroboscopically with femtosecond pulses of visible light, x-rays, or electrons. Here we report three-dimensional imaging of the generation and subsequent evolution of coherent acoustic phonons on the picosecond time scale within a single gold nanocrystal by means of an x-ray free-electron laser, providing insights into the physics of this phenomenon. Our results allow comparison and confirmation of predictive models based on continuum elasticity theory and molecular dynamics simulations.read more
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Fast parallel algorithms for short-range molecular dynamics
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A population of fast radio bursts at cosmological distances.
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X-Rays and Extreme Ultraviolet Radiation: Principles and Applications
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TL;DR: The Göttingen UTEM employs nano-localized linear photoemission from a Schottky emitter, which enables operation with freely tunable temporal structure, from continuous wave to femtosecond pulsed mode and achieves record pulse properties in ultrafast electron microscopy.
References
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Journal ArticleDOI
Fast parallel algorithms for short-range molecular dynamics
TL;DR: In this article, three parallel algorithms for classical molecular dynamics are presented, which can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors.
Fast parallel algorithms for short-range molecular dynamics
TL;DR: Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems.
Journal ArticleDOI
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First lasing and operation of an ångstrom-wavelength free-electron laser
Paul Emma,R. Akre,J. Arthur,Richard M. Bionta,Christoph Bostedt,John D. Bozek,Axel Brachmann,Philip H. Bucksbaum,Ryan Coffee,F.-J. Decker,Y. Ding,David H. Dowell,S. A. Edstrom,Alan Fisher,Josef Frisch,Sasha Gilevich,Jerome B. Hastings,G. Hays,Ph. Hering,Zhirong Huang,R. H. Iverson,Henrik Loos,Marc Messerschmidt,A. Miahnahri,Stefan Moeller,Heinz-Dieter Nuhn,G. Pile,Daniel Ratner,J. Rzepiela,D. Schultz,T. Smith,P. Stefan,H. Tompkins,Joshua J. Turner,J. Welch,William E. White,Juhao Wu,Gerald Yocky,J. Galayda +38 more
TL;DR: The Linac Coherent Light Source free-electron laser has achieved coherent X-ray generation down to a wavelength of 1.2 A and at a brightness that is nearly ten orders of magnitude higher than conventional synchrotrons.
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Quantitative measurement of displacement and strain fields from HREM micrographs
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