Category Archives: ultrafast

3D object reconstruction from random orientations

The featured item this time is “Structure from Fleeting Illumination of Faint Spinning Objects in Flight with Application to Single Molecules” by Russell Fung and co-authors at U Wisconsin Milwaukee. The promise of solving atomic-resolution 3D structure of biological proteins … Continue reading

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sub-picosecond movies of nucleation dynamics

A shortlived SPPS facility is still producing papers – this week it’s the PRL paper by Aaron Lindenberg and some 28 co-authors ” X-Ray Diffuse Scattering Measurements of Nucleation Dynamics at Femtosecond Resolution” Phys. Rev. Lett. 100, 135502 (2008). This … Continue reading

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Droplet Coalescence

Two recent PRLs are addressing the issue of how two droplets merge into one. Kamel Fezzaa and Yujie Wang from Argonne use ultrafast x-ray phase-contrast imaging to take sub-microsecond exposures of droplet coalescence, which is complete in just under a … Continue reading

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Xraying Nanoparticles in Ball-Lightning and Fuel Injection jets

Observations of ball-lightning – long-lived (2 to 50 seconds) bright fireballs size of baseball to beach ball – have been observed for centuries. Previous theoretical work ascribes the longevity of the ball lightnings to the slow oxidation process of silicon, … Continue reading

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Metal-Insulator transition in VO2

There were a number of papers in the past month or so on Metal-Insulator transition in vanadium dioxide. The first work is the near-scanning infrared microscopy measurements done by Mumtaz Qazilbash et al. from Basov group at UCSD published last … Continue reading

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XFEL trifecta in Science, Nature

Last week was the “perfect storm” of XFEL ultrafast science, with four papers in Nature and Science: Nature featured a paper by Henry Chapman et al. on Femtosecond time-delay X-ray Holography. By recording an interference pattern of a particle and … Continue reading

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Ultrafast work at SPPS

This week’s item is inspired by my recent visit to Stanford, in anticipation of the world’s first x-ray free electron laser – LCLS, which will open in 2009. LCLS is a facility that will feature ultrashort (200 fs) x-ray pulses … Continue reading

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