SLAC National Accelerator Laboratory
Showing 1,701-1,800 of 1,821 Results
-
Xijie Wang
Distinguished Scientist, SLAC National Accelerator Laboratory
BioXijie Wang is a distinguished scientist and the founding director of SLAC MeV-UED user facility at SLAC National Accelerator Laboratory. Xijie Wang has more than 30 years' experience in accelerator physics, free electron laser, THz, and ultrafast science and technology. Xijie pioneered the idea using mega-electron-volt electrons for ultrafast electron diffraction (MeV-UED) and ultrafast electron microscope (MeV-UEM). Under Wang’s direction, SLAC has become the world leader in ultrafast electron scattering technologies including single-shot, diffuse scattering, micro-diffraction, operando and in-situ, the first ever femto-second gas and liquid phase UED. These technologies have opened new frontiers in ultrafast science and materials in extreme conditions, produced insight into ultrafast structure dynamics of 2-D materials; control of the topological properties of matter; and atomic & molecular movies of complex materials such as perovskite and fundamental chemical processes in gas and liquid phases. He established the first ultrafast electron scattering user facility in the world – SLAC MeV-UED in 2019. Xijie Wang initiated superconducting RF gun R&D program at SLAC, and he led the effort established SRF gun R&D for LCLSII-HE.
Prior to his time at SLAC, Wang spent over 20 years at Brookhaven National Laboratory (BNL), where he led development and operations of the Accelerator Test Facility (ATF) and the Source Development Laboratory (SDL). Wang played a leading role in research on laser accelerators, high-brightness electron beams, X-ray free electron lasers (FEL), RF deflector for LCLS, THz and MeV-UED at BNL. He developed photocathode RF gun injectors that derived the first saturation of both high-gain harmonic generation (HGHG) FEL at BNL’s ATF and Self-amplified spontaneous emission (SASE) FEL at Argonne National Laboratory. Wang and his collaborators carried out a series of pioneering FEL experiments in early 2000s: 2nd to 4th harmonic HGHG, VISA (Visible to Infrared SASE Amplifier) SASE FEL and nonlinear harmonic generation characterization; super radiance FEL, detuning and tapering for FEL efficiency improvement.
Xijie Wang has co-authored over 300 publications, including 8 in Science, 4 in Nature, 7 in Science Advances, 14 in Nature family journals, and over 20 in PRL. -
Paul B. Welander
Lead Scientist, SLAC National Accelerator Laboratory
BioPaul Welander is a Lead Scientist and Head of the Quantum Devices Department in the Technology Innovation Directorate at SLAC National Accelerator Laboratory. Paul’s research interests concern materials for quantum devices, from the study of materials-induced decoherence mechanisms in superconducting quantum bits, to the development of materials platforms that enable novel quantum technologies. He’s a researcher in both the Detector Microfabrication Facility and Nano-X, two new state-of-the-art cleanrooms at SLAC geared toward superconductor quantum device fabrication and rapid nano-prototyping, respectively. Paul also leads experiments at the Stanford Synchrotron Radiation Lightsource (SSRL) to characterize materials used in superconducting quantum devices and correlate those measurements with device performance and quantum decoherence rates. His expertise includes molecular beam epitaxy of metal-oxide heterostructures, superconducting device fabrication, and an array of materials characterization techniques including electron and x-ray diffraction, photoelectron spectroscopy, and scanning probe microscopy. Paul received his Ph.D. in physics from the University of Illinois at Urbana-Champaign, and holds Bachelors degrees from both Caltech and Occidental College. Prior to joining SLAC in 2012, he spent five years as a member of the technical staff at MIT Lincoln Laboratory.
-
Gregory R. White
Information Systems Spec, SLAC National Accelerator Laboratory
Current Role at StanfordGregory White presently holds the position of Senior Advisor in Computer Science to the Associate Laboratory Director for Accelerators at SLAC National Accelerator Laboratory. He also has a continuing role as engineering-physicist in the Accelerator Directorate.
-
Thomas Wolf
Lead Scientist, SLAC National Accelerator Laboratory
Current Role at StanfordChemical Science Department Head, Linac Coherent Light Source (LCLS)
Principal Investigator, Stanford PULSE Institute, SLAC National Accelerator Laboratory
