SLAC National Accelerator Laboratory
Showing 1,601-1,700 of 1,843 Results
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Hirohisa A. Tanaka
Professor of Particle Physics and Astrophysics
Current Research and Scholarly InterestsParticle physics and astrophysics, neutrino properties, dark matter
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Sami Gamal-Eldin Tantawi
Professor of Particle Physics and Astrophysics, Emeritus
BioFor over a decade I have advocated for dedicated research efforts on the basic physics of room temperature high gradient structures and new initiatives for the associated RF systems. This required demanding multidisciplinary collaboration to harness limited resources. The basic elements of the research needed to be inclusive to address not only the fundamentals of accelerator structures but also the fundamentals of associated technologies such as RF manipulation and novel microwave power sources. These basic research efforts were not bundled with specific developments for an application or a general program. The emerging technologies promise a broad, transformational impact.
With this underlying philosophy in mind, in 2006 the US High Gradient Research Collaboration for which I am the spokesman was formed. SLAC is the host of this collaboration, which comprises MIT, ANL, University of Maryland and University of Colorado, NRL and a host of SBIR companies. This led to the revitalization of this research area worldwide. The international collaborative effort grew to include KEK in Japan, INFN, Frascati in Italy, the Cockcroft Institute in the UK, and the CLIC team at CERN.
This effort led to a new understanding of the geometrical effects affecting high gradient operations. The collaborative work led to new advances in understanding the gradient limits of photonic band gap structures. Now we have a new optimization methodology for accelerator structure geometries and ongoing research on alternate and novel materials. These efforts doubled the usable gradient in normal conducting high gradient linacs to more than 100 MV/m, thus revitalizing the spread of the technology to other applications including compact Inverse Compton Scattering gamma-ray sources for national security applications, and compact proton linacs for cancer therapy. -
Christopher John Tassone
Associate Professor (Research) of Photon Science
BioChristopher J. Tassone, PhD is the Associate Lab Director for the Energy Sciences Directorate. His scientific interests lie in the development and characterization of advanced materials for energy. Dr. Tassone’s research addresses critical challenges in energy transition materials, plastics production, and catalysis, with the goal of improving energy technologies and utilizing domestically secure feedstocks. He is an expert in synchrotron-based X-ray scattering techniques, which he uses to probe the time resolved structure of materials as they are synthesized, and how they evolve under operation. He compliments this focus on developing operando and in-situ methods, with the development and application of machine learning for data interpretation and experimental steering. Through this work, Dr. Tassone helps accelerate the discovery of innovative materials for energy and catalysis.
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Jana B. Thayer
Research Technical Manager 3, LCLS - Linac Coherent Light Source
Current Role at StanfordLCLS Experimental Data Systems Division Director
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Lokman Turkmen
Senior PM - Design and Const., DDPI Office
Current Role at StanfordLokman is currently working for SLAC National Accelerator Laboratory which operated by Stanford University as a contractor for the United States Department of Energy (DOE) in San Francisco Bay Area as Senior Project Manager.
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Joshua J. Turner
Lead Scientist, LCLS - Linac Coherent Light Source
BioJoshua Turner is a lead scientist at the Stanford Institute for Materials and Energy Sciences, a joint institute between Stanford University and SLAC, as well as at the Linac Coherent Light Source, the world’s first x-ray free electron laser (XFEL) based at SLAC.
He received both a BS in Physics and a BA in Mathematics from UC Santa Barbara, a MA in Physics from Boston University, and a PhD in Physics from the University of Oregon. He moved to Stony Brook University, NY to work as a postdoctoral fellow, lecturer, and then adjunct assistant professor, before coming to Stanford.
Turner is a leader in ultra-fast x-ray studies, which he has applied to an array of scientific fields, from chemistry and materials physics to the study of plasmas found in large planets and hot astrophysical objects. His most recent work focuses on new modes of the XFEL which can be used to examine subtle fluctuations in materials using short, coherent x-ray pulses on new energy scales. This will advance the frontier in quantum materials through the observation of novel types of order found in exotic systems such as topological magnets, unconventional superconductors, and strongly spin-orbit coupled Mott insulators.
He is the recipient of the Department of Energy’s Early Career Award, a prestigious award granted to further the individual research programs of outstanding scientists with demonstrated successful research activities and potential for solving important problems to the U. S. government. He has published over 100 scientific articles with one-third of them in high-profile journals. -
Tim B van Driel
Lead Scientist, LCLS - Linac Coherent Light Source
BioTim van Driel is a Lead Scientist at the Linac Coherent Light Source (LCLS) within the SLAC National Accelerator Laboratory with over a decade of experience as a subject matter expert. His research focuses on ultrafast time-resolved chemical dynamics, and he is currently leading the development of the LCLS-II-HE Condensed Phase Chemistry endstation. His efforts span experimental design, precision instrumentation and diagnostics, detector improvements, and advanced analysis frameworks to capture the non-equilibrium evolution of complex chemical systems. By directing "molecular movies," his work aims to visualize and control the fleeting dynamics of structure, spin, and charge that dictate performance from isolated molecules to energy and quantum materials. Dr. van Driel leads the deployment and development of the Liquid Jet Endstation (LJE) at LCLS, a specialized platform enabling femtosecond resolution measurements of photochemical and solvation processes.
Increasingly, his work focuses on the intersection of ultrafast multimodal X-ray science and artificial intelligence. Dr. van Driel is pioneering the integration of AI/ML into complex experimental workflows from dimensional reduction, improved signal to noise as well as automated pipelines and cross experiment scientific insights. He is also a key member of the ISAAC pathfinder project to autonomously guide and accelerate scientific discovery in catalysis across multiple national laboratories, seamlessly combining massive multimodal datasets with advanced theoretical models.
He received his Ph.D. in Physics from the Technical University of Denmark and his M.Sc. in Nanoscience from the University of Copenhagen. At SLAC, he is also deeply involved in pursuing new scientific directions and engaging with the larger community as the Secretary for the Peer Review Panel (PRP) for Chemistry, Soft Condensed Matter & Disordered Materials (CSD) and as an LCLS Culture Champion.
