Topic: MeV-UED - SLAC National Accelerator Laboratory The MeV-UED instrument, part of the LCLS User Facility, is a powerful “electron camera” for the study of time-resolved, ultrafast atomic molecular dynamics in chemical and solid-state systems SLAC staff scientist Alexander Reid handles an interchangeable sample card used to hold samples during UED experiments
Ultrafast electron diffraction (UED) - SLAC National Accelerator Laboratory Ultrafast electron diffraction can reveal motions of electrons and atomic nuclei within molecules that take place in less than a tenth of a trillionth of a second – information that will benefit groundbreaking research in materials science, chemistry and biology MeV-UED page on LCLS website
SLAC researchers pioneer new methods in ultrafast science for sharper . . . MeV-UED takes snapshots by hitting samples with a beam of electrons and recording what happens in the material as the electrons pass through The result is a molecular movie that allows scientists to peer into the behavior of molecules and atoms at ultrafast speeds and gain insights into processes that are key to energy solutions and innovative
Researchers catch protons in the act of dissociation with SLAC’s . . . The research was funded in part by the DOE Office of Science MeV-UED is an instrument of SLAC’s LCLS X-ray laser facility LCLS is a DOE Office of Science user facility Citation: Elio Champenois et al , Physical Review Letters, 5 Oct 2023 (10 1103 PhysRevLett 131 143001)
SLAC Builds One of the Worlds Fastest Electron Cameras “UED has been under development for the past 10 to 15 years, but the repulsive forces between electrons in the electron beam limited the time resolution of previous experiments,” says the paper’s first author Stephen Weathersby, the facility manager of SLAC’s Accelerator Structure Test Area (ASTA), where the UED machine is installed
SLAC’s high-speed electron camera uncovers a new ‘light-twisting . . . Using SLAC’s instrument for ultrafast electron diffraction (MeV-UED), one of the lab’s world-leading tools for ultrafast science, researchers discovered how an ultrathin material can circularly polarize light This discovery sets up a promising approach to manipulate light for applications in optoelectronic devices
SLAC’s high-speed ‘electron camera’ films molecular movie in HD “UED provided us with data that have the high spatial resolution needed to test these methods,” said Stanford chemistry professor and PULSE researcher Todd Martinez, whose group led the computational analysis “This paper is the most direct test of our methods, and our results are in excellent agreement with the experiment ”
Scientists take first snapshots of ultrafast switching in a quantum . . . MeV-UED is an instrument of the Linac Coherent Light Source (LCLS) user facility, operated by SLAC on behalf of the DOE Office of Science, which funded this research Citation: Sood et al , Science , 16 July 2021 (10 1126 science abc0652)
Image: UED schematic | SLAC National Accelerator Laboratory UED schematic Schematic of SLAC’s new apparatus for ultrafast electron diffraction – one of the world’s fastest “electron cameras” – researchers can study motions in materials that take place in less than 100 quadrillionths of a second
In a first, scientists capture a ‘quantum tug’ between neighboring . . . This experiment overcame that problem by using SLAC’s MeV-UED, a high-speed “electron camera” that detects subtle molecular movements by scattering a powerful beam of electrons off samples The research team created 100-nanometer-thick jets of liquid water – about 1,000 times thinner than the width of a human hair – and set the