SLAC National Accelerator Laboratory
Showing 101-200 of 1,933 Results
-
Simon R Bare
Distinguished Staff Scientist, SLAC National Accelerator Laboratory
Current Role at StanfordStanford Synchrotron Radiation Lightsource (SSRL)
-
Suman Bhasker Ranganath
Postdoctoral Scholar, Photon Science, SLAC
Current Research and Scholarly InterestsDevelopment of machine-learning models from high-throughput catalysis simulations.
-
Surjendu Bhattacharyya
Research Assoc-Experimental, SLAC National Accelerator Laboratory
BioI am currently a Research Associate at SLAC’s LCLS SRD Chemical Science Department. My research focuses on time-resolved dynamics in the gas phase, with a particular interest employing novel experimental techniques to investigate the dynamics of molecules, radicals, and ions. These techniques include Coulomb explosion imaging, MeV electron diffraction (MeV-UED), X-ray scattering, X-ray absorption, and photoelectron spectroscopy. This work aims to improve the fundamental understanding of energy, environmental, biological, and atmospheric processes.
I am currently adapting a pyrolysis source to a time-of-flight spectrometer to perform time-resolved studies of radicals using UV, high harmonic generation (HHG), and X-rays. Additionally, I plan to integrate the pyrolysis setup with MeV-UED to investigate structural molecular dynamics through diffraction measurements. -
Alex Bien
Accel System Operator I, SLAC National Accelerator Laboratory
BioI am a 2022 graduate with a B.S. in physics from the University of Maryland at College Park, and I currently operate the world's longest and most powerful linear particle accelerator administrated by Stanford University under the direction of the US Department of Energy. Here I interface directly with the machinery, controls, and safety systems for three linear accelerator facilities: FACET-II where electron-pair beams are shot thru hot plasma to study novel wakefield acceleration techniques, LCLS where coherent x-rays of very high energy (and inversely low wavelength) probe deep into matter for imaging at atomic scales, and LCLS-II where commissioning is underway to produce a much more powerful megahertz rep rate superconducting beam that can leverage the same XFEL mechanism to (instead of just taking snapshots) also resolve the dynamics of chemical reactions in situ.
-
Olivier N. Bonin
Digital Media Specialist, SLAC National Accelerator Laboratory
BioBorn in the French Alps, I did a Master in Electrical and Micro-Electronic Engineering. I was an engineer in the Silicon Valley for 10 years developing semiconductor libraries of components for use on chips by many of the big names in the industry. After the last company I worked with was sold in parts, I left the industry to work on a full feature documentary about Burning Man. The film, Dust & Illusions, focused on a 30-year history that surprisingly nobody ever explored before. That lead me to develop video content for various companies, such as Whole Foods, Samsung, Stanford until I joined WildAid for a year producing videos to help stop the illegal wildlife trade (that potentially led to the covid-19 pandemic). Finally today I am the video and multimedia producer for SLAC National Accelerator Laboratory with the goal of bringing attention to the fundamental research in physics and biology that the Lab focuses on.
-
Sebastien Boutet
Senior Scientist, SLAC National Accelerator Laboratory
BioI am currently a Senior Staff Scientist at the Linac Coherent Light Source (LCLS), part of SLAC National Accelerator Laboratory. I also serve the role of LCLS Director of Experimental Operations since 2020.
I joined SLAC in 2007 working on the Coherent X-ray Imaging (CXI) instrument as part of the LCLS Ultrafast Science Instrument (LUSI) project. This project delivered one of the first operating LCLS instruments in 2011, available to the user community for cutting edge ultrafast x-ray science. After a few years of working with LCLS staff and a broad user community on many experiments, I also worked on the design and deployment of a new LCLS x-ray instrument, the Macromolecular Femtosecond Crystallography (MFX) instrument. From there, I became the Department Head for the LCLS Hard X-ray Department, charged with the operations of the XPP, XCS, MFX and CXI instruments. I worked in this role until 2020 when I become LCLS Director of Experimental Operations.
During my undergraduate studies in Physics at McGill University, I spent a summer at TRIUMF at the University of British Columbia working on heavy ion cooling trap simulations. After graduating with Honours in 1999, I joined Ian Robinson x-ray diffraction group at the University of Illinois at Urbana-Champaign, where I learned how to perform synchrotron experiments at multiple light source including NSLS, ESRF and the APS. My primary focus during PhD work was on applying known and novel techniques of surface diffraction and coherent diffractive imaging to the study of protein crystals. After some work on large protein crystals surface diffraction at NSLS, most of my efforts shifted to a new beamline at the APS. I participated in the installation and commissioning of this beamline, sector 34ID-C, although I was far from the primary contributor. This nevertheless introduced me to the intricacies of building x-ray beamlines. I then used this beamline for a few years to study the shapes and internal defects of crystals of proteins using newly developed coherent diffractive imaging techniques applied to small crystals. While some successes were achieved, it became clear that limitations exist at synchrotrons due to sample motion and radiation damage. Luckily, as I completed my PhD work in 2005, new light sources were in construction that would remove thee limitations. FLASH in Hamburg and LCLS were soon to come online. I spent a few years at the APS trying to observe shape transforms from protein crystals, with great difficulty, something that LCLS now routinely accomplishes without much effort due to the instantaneous nature of the LCLS measurements.
After completion of my PhD work, I joined SLAC as a Research Associate, with a joint appointment with Uppsala University and Janos Hajdu but spending all my time at Lawrence Livermore National Laboratory working with the group of Henry Chapman. We spent a couple of years using FLASH to demonstrate the feasibility of using ultrashort FEL pulses for “diffraction-before-destruction” imaging and developing new tools and techniques for FEL research. -
Axel Brachmann
Research Technical Manager, SLAC National Accelerator Laboratory
Current Role at StanfordDivision Director (SLAC)
-
Cameron Bravo
Casual - Nonexempt, SLAC National Accelerator Laboratory
BioBorn in Kansas City, Missouri and attended high school in Peculiar (Ray-Pec). Undergraduate studies at the University of Nebraska - Lincoln, the Paul Scherrer Institute, and the Swiss Federal Institute of Technology (ETH Zurich). Studied ASIC design after helping characterize the PSI46 pixel chip used in the CMS detector. Graduate education at UCLA searching for Electroweak Sphalerons in proton-proton collisions with the CMS experiment while working on the muon system. Wrote BaryoGEN, a new Monte Carlo generator, to study all possible B+L violating fermion configurations potentially generated via Sphalerons and/or Instantons. Interests include front-end detector electronics, DAQ systems, gas detectors, Si detectors, non-perturbative physics (especially within the Standard Model), High-Multiplicity Electroweak Boson production, and exotic dark matter models. Currently working with the Heavy Photon Search (HPS) experiment on the Silicon Vertex Tracker (SVT) sub-system and searching dark sector models with an A' lighter than the dark matter threshold, SIMPs, and true muonium.
-
Martin Breidenbach
Professor of Particle Physics and Astrophysics, Emeritus
BioI have worked for more than 45 years in experimental particle physics, often in developing new kinds of electronics and instruments critical to the detectors that enable the physics experiments of interest. In 1965 through 1971, I was involved in the electron scattering program at SLAC. The deep inelastic experiments that discovered the scaling and point like structure in the nucleon, later interpreted as quarks, was my Ph.D. thesis. I then spent a year at CERN, mostly doing an experiment on minimum bias behavior of proton-proton scattering at the newly operating Intersecting Storage Rings. Despite intentions to stay longer at CERN, I was persuaded by Professor Richter to return to SLAC and join his SPEAR storage ring group. In the 1974 “November Revolution”, we discovered the and ’ particles, soon interpreted as bound states of charm-anti-charm quarks, which caused essentially complete acceptance of the quark model as real. Another critical discovery at SPEAR was the lepton, leading to the third family of the Standard Model.
Subsequently Professor Charles Baltay and I were co-spokesmen of the SLD, a comprehensive large detector for the SLAC Linear Collider (SLC), where we did Z physics, particularly polarization asymmetries possible because of the SLC polarized electron beam which led to a (correct) prediction of the Higgs mass, and precision b physics with a 300 MPixel CCD vertex detector.
I am now involved in the design of a detector for the International Linear Collider which may be built in Japan, which has led to substantial involvement in Si detector sensors and associated readout ASIC’s. I believe we have developed the first wafer scale sensors with on sensor traces leading to a relative small area “readout system on a chip” that delivers processed digital signals to a DAQ.
I also work on a search for neutrinoless double beta decay (02) in 136 Xe. The 02 experiment utilizes a liquid xenon TPC requiring ultra-low background materials, techniques, and locations, which was an education into rather different experimental techniques from collider detectors.
I am working on a new concept for an e+e- linear collider called C^3 for the Cool Copper Collider. The Cool Copper Collider (C3) is an advanced concept for a high energy e+e- linear collider. It is based on a new SLAC technology that dramatically improves efficiency and breakdown rate. C3 uses distributed power to each cavity from a common RF manifold and operates at cryogenic temperatures (LN2, ~80K). This makes it robust at high gradient: 120~MeV/m.
C3 is a promising option for a next-generation e+e- collider. It has the potential to reach energies of up to 1 TeV, which would allow it to study the properties of particles that are difficult to access with current experiments. C3 is also relatively affordable, which makes it a more viable option than some of the other proposed linear colliders.
Finally, these recent experiences have led to exploratory collaborative efforts in neuroscience, where we believe our SLAC expertise in sensors and electronics could be rather synergistic with Stanford efforts in tACs and in neural recording probes. -
Mathew Britton
Staff Scientist, SLAC National Accelerator Laboratory
Current Role at StanfordStaff Scientist, Laser Methods & Metrology Group, Laser Science Department, Linac Coherent Light Source
-
Stanley Brodsky
Professor of Particle Physics and Astrophysics, Emeritus
BioRecipient of the Watkins Physics Award and Visiting Professorship by the Watkins Foundations at Wichita State University in November, 2017.
Awarded the International Pomeranchuk Prize for 2015.
The Pomeranchuk Prize is a major international award for theoretical physics, awarded annually since 1998 by the Institute for Theoretical and Experimental Physics (ITEP)
from Moscow to one international scientist and one Russian scientist, It is named after Russian physicist Isaak Yakovlevich Pomeranchuk, who together with Lev Landau,
established the Theoretical Physics Department of the Institute. The Laureates for 2015 were Professor Victor Fadin and myself.
Recipient of the 2007 J. J. Sakurai Prize in Theoretical Physics, awarded by the American Physical Society.
Honorary degree of doctor scientiarum honoris causa (dr.scient.h.c.) from Southern Denmark University
Alexander von Humboldt Distinguished U.S. Senior Scientist Award in 1987
Chair of the Hadron Physics Topical Physics Group (GHP) of the American Physical Society, 2010.
