SLAC National Accelerator Laboratory
Showing 1-50 of 137 Results
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Mario D. Balcazar
Physicist-Experimental, SLAC National Accelerator Laboratory
Project Scientist, SLAC National Accelerator LaboratoryCurrent Role at StanfordResearch Scientist at the Linac Coherent Light Source (LCLS) in SLAC National Accelerator Laboratory. Working on the Cavity-Based X-ray Free Electron Laser (CBXFEL) project.
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Simon R Bare
Distinguished Staff Scientist, SLAC National Accelerator Laboratory
BioAppointments
2017-now Adjunct Professor, Department of Chemical Engineering, University of California, Davis
2016-now Distinguished Scientist, SSRL, SLAC National Accelerator Laboratory
2010–2016 Research Fellow, UOP LLC, Des Plaines, IL
2003–2010 Senior Research & Development Associate, UOP LLC, Des Plaines, IL
1996–2003 Research & Development Associate, UOP LLC, Des Plaines, IL
1986–1996 Staff Scientist, The Dow Chemical Company, Midland, MI
1984–1986 Postdoctoral Research Associate, Materials & Molecular Research Division, Lawrence Berkeley National Laboratory, Berkeley
1982–1984 Postdoctoral Research Associate, Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY
Professional Preparation
University of Liverpool, U.K.ChemistryB.Sc. (Honors) 1979
University of Liverpool, U.K.Physical ChemistryPh.D.1982
Workshops Organized:
Conference Chair:“Operando-IV: Recent developments and future perspectives in spectroscopy of working catalysts,” April 2012, Brookhaven National Laboratory
Co-Chair:“Advanced x-ray techniques for catalyst characterization”, ACS National Meeting, April 2017. -
Sandra Beauvarlet
Visiting Physicist, SLAC National Accelerator Laboratory
BioPostdoctoral Researcher and Visiting Scholar specialized in ultrafast laser-matter interaction.
My PhD research focused on investigating molecular chirality through the interaction of electrons with laser pulses at the femtosecond and attosecond timescale via the PhotoElectron Circular and ELliptical Dichroism (PECD and PEELD). This finality demanded several laser source and metrology developments such as : (i) Performed frequency conversion up to the 4th harmonic of an Amplitude System Tangerine Yb-fiber short pulse laser at 1030 nm and used its Optical Parametric Amplifier to generate short pulse continuously tunable source. (ii) Engineered various polarization schemes ranging from the simplicity of 1 color pulse circularly polarized to the complexity of 2 non-colinear sets of two-color orthogonally polarized pulses with an active sub-cycle delay stabilization. (iii) Contributed to low-loss capillary-based visible pulse compression at the Yb-fiber laser's second harmonic (515nm) and built the FROG instrument to measure sub-15 fs pulses. (iv) Build and tuned UV attosecond table-top sources using the process of High Harmonic Generation (HHG). (v) Developed 2D and 3D electron spectroscopy instruments (VMI, COLTRIMS) and algorithmS notably using Fourier Transform, Abel inversion, Radon transform...
My postdoctoral research focus extended to the physics of X-ray Free Electron Laser (XFEL) at LCLS and broadened to the use of these X-ray attosecond pulses to drive ultrafast dynamics in atoms and molecules. My current work and interest focus on electron/ion spectroscopy (MBES), absorption spectroscopy and X-ray diffraction probing Charge Migration, Ring Opening, Isomerization, Conical Intersections, Raman Scattering ... but also enhance the collected data quality using variability to our advantage through Covariance approaches and ghost imaging based Machine Learning procedure to improve attosecond spectroscopy. -
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.