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April 2020
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  1. NSLS-II Friday Lunchtime Seminar

    "Catalysis with XAFS and XPS at the Brazilian synchrotron: examples and perspectives"

    Presented by Daniela Coelho de Oliveira, LNLS, Brazil

    Friday, March 6, 2020, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    In this talk, I will present some recent results of catalysts characterization obtained at the Brazilian synchrotron using XAS and/or XPS . I will show a brief perspective of the new capabilities that are planned to attend the catalysis community as well as other research areas.

  2. NSLS-II Friday Lunchtime Seminar

    "Probing the short-range spin correlations of CuGeO3 with time-resolved RIXS"

    Presented by Thorsten Schmitt, Paul Scherrer Institut, Photon Science Division, Swiss Light Source, Switzerland

    Friday, February 28, 2020, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Resonant Inelastic X-ray Scattering (RIXS) has become a versatile tool for probing quantum materials, allowing simultaneous access to charge, lattice, spin and orbital degrees of freedom. Much of its success in recent years has been driven by huge improvements in instrumentation, and with the recent advent of X-ray free electron lasers such as the LCLS, it has become possible to translate this technique into the time-domain. Given its ability to address multiple degrees of freedom at once, time-resolved RIXS (trRIXS) therefore has huge potential for investigating materials with cooperative dynamics. Nevertheless, it remains technically very challenging to perform such experiments. We performed trRIXS at the oxygen K-edge in order to probe short-range spin correlations in CuGeO3. This quasi-1D material formed of chains of edge-sharing CuO4 plaquettes, displays pronounced anti-ferromagnetic (AFM) nearest-neighbor spin correlations and transitions into a spin-Peierls phase below 14 K, highlighting a close relation between magnetic and lattice sub-systems. As a result of these AFM correlations a Zhang-Rice singlet (ZRS) exciton can develop during the RIXS process, resulting in a distinct energy loss peak within the charge transfer gap. The amplitude of this ZRS exciton directly reflects the nearest-neighbor AFM correlations [1]. By photoexciting CuGeO3 across the charge gap (~4 eV) we induce a sudden reduction of the intensity of the ZRS exciton within 1 ps, which rapidly recovers before gradually decreasing again towards a stable value after ~10 ps. Comparison to equilibrium measurements and a thermal model reveal that the longer time scale dynamics are dominated by heating of the lattice. However, the initial drop and recovery of the ZRS at short time scales clearly imply a non-thermal behavior. In comparison, lower fluence data shows only a thermal component, suggesting a threshold effect. By comparison with model Hamiltonian calculations we reveal

  3. NSLS-II Friday Lunchtime Seminar

    "Effect of Metal (Pt, Ir) Nuclearity in the Subnanometer Regime on CO Oxidation Activity"

    Presented by Ayman M. Karim, Department of Chemical Engineering, Virginia Polytechnic Institute and State University

    Friday, February 21, 2020, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Supported noble metal catalysts are extensively used in industry and their catalytic performance is strongly affected by particle size and shape. In the last decade, supported single atoms and clusters in the subnanometer size regime have attracted a lot of interest since they maximize the metal utilization and have also shown extraordinary catalytic properties for many reactions. However, to tailor the catalyst properties for specific reactions and determine possible limitations, there is a need to understand, on the atomic scale, the origin of reactivity in the subnanometer regime. In this seminar, I will present my group's efforts in understanding the role of metal nuclearity and electronic properties in catalyzing CO oxidation as a model reaction. Using a suite of advanced characterization techniques (aberration-corrected electron microscopy, microcalorimetry, in-situ and in-operando DRIFTS, XPS, EXAFS and HERFD-XANES) complemented by DFT calculations and detailed kinetics measurements, the catalyst structural and electronic properties are identified and correlated with the reaction kinetics. In the talk, CO oxidation on Ir and Pt single atoms and subnanometer clusters supported on MgAl2O4 and CeO2, respectively, will be presented. We identified the active Ir and Pt single atom complexes and show that the reaction follows a combination of Eley-Rideal and Mars-van Krevelen mechanisms. Moreover, we show that despite considered a non-reducible support, CO oxidation on MgAl2O4 supported Ir subnanometer clusters follows a similar mechanism as on a reducible oxide where O2 is activated at the metal-support interface. Finally, the role of metal-support interaction in O2 activation and effect of CO binding strength on the catalytic activity will be discussed.

  4. NSLS-II Colloquium

    "Subsurface Landscapes of Oxidation and Reaction in the Critical Zone"

    Presented by Susan Brantley, Pennsylvania State University, PA

    Thursday, February 13, 2020, 4 pm
    Large Seminar Room, Bldg. 510

    Hosted by: John Hill

    The globally ubiquitous mineral pyrite oxidizes even at low oxygen concentrations. As the most common crustal sulfide, pyrite reactivity impacts sulfur, iron, oxygen, and carbon budgets globally. We discovered that pyrite oxidizes completely at tens of meters depth even in low-porosity rocks in catchments in humid climates. As erosion exposes the pyrite to near-surface conditions in low porosity rocks, pore and fracture development is the main control on the rate of oxidative weathering. Between fractures, oxygen diffusion limits the weathering and oxidation is inferred to be largely abiotic because bacteria cannot enter rock matrix pores. Oxygen concentrations and erosion rates together can explain pyrite-derived sulfate fluxes in rivers to the ocean and may account for the presence or absence of pyrite in detrital sediments over Earth history.

  5. NSLS-II Friday Lunchtime Seminar

    "Tracing Processes Involving the Reactive Intermediates of To Better Understand the Role of Sulfur Cycling on the Fate of Arsenic and Iron in Sediments; Using Reactive Intermediates to Document Extensive Cryptic Sulfur Cycling Affecting Arsenic Levels"

    Presented by BENJAMIN C. BOSTICK, Columbia University, Palisades, NY

    Friday, January 31, 2020, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Arsenic (As) groundwater contamination is thought to result from the reductive dissolution of As-bearing iron oxides by microorganisms. Our understanding of the how reactions occur commonly depends on observing the consumption and production of reactants and products respectively. This approach can be insufficient in environmental systems containing complex compositions and phases that can react through multiple and distinct coupled biological and chemical processes. We suggest it is more effective to study environmental processes by considering dissolved and mineral species as reactive intermediates in geochemical cycles where their concentration is controlled by the balance between their production, consumption and transport. Here, we apply this approach to elucidate a critical role of sulfur (S) cycling in iron reduction in sediments affected by As contamination. Arsenic (As) contamination in soil and groundwater is commonly associated with iron reduction because the concentration of dissolved As and Fe(II) increase together as Fe(III) minerals convert to Fe(II) minerals. In contrast, sulfate concentrations are usually low and stable in groundwaters affected by As. This stability is often interpreted as evidence for the minimal role of S cycling in Fe reduction; however, there is mounting biochemical and mineralogical evidence that sulfate reduction is active and critical to both Fe(III) reduction and As mobilization. Sediment iron mineralogies indicate that reactive Fe(III) minerals are present in most sediments and this Fe(III) is particularly susceptible to chemical and biological reduction. These Fe minerals were transformed to Fe(II) carbonate, green rusts, and, rarely, iron sulfides as the sediments became reduced. The microorganisms identified in sediments undergoing reduction were not iron reducers, and often were autotrophs involved in S cycling. This data suggests that sulfate reduction is active, and tightly coupled to the oxidation of sulfide and elem

  6. NSLS-II Friday Lunchtime Seminar

    "Real-space Local Correlated Motion in Liquids studied by using Inelastic Scattering"

    Presented by Yuya Shinohara, Oak Ridge National Laboratory

    Friday, January 17, 2020, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Liquids are critical to our daily life. A paramount example is water, which covers 70% of the Earth's surface and make up about 80% of our body. Liquids are also crucial to many current energy technologies. Despite their importance, our understanding of liquids at the atomic level is much poorer than that for crystalline solids. Particularly elusive is a detailed description of the correlated dynamics in liquids, which is the key to controlling the transport properties of liquids. Recent progress in inelastic X-ray/neutron scattering makes it possible to obtain inelastic scattering spectra over a wide energy transfer (E) and momentum transfer (Q) with a high E- and Q-resolution within a reasonable amount of time. This enables us to calculate the Van Hove correlation functions via Fourier transform. With this novel approach, we have determined spatial and temporal correlations of molecular motion of liquids. In this presentation, I will present our recent efforts in understanding the real-space local correlated motion in liquids.

  7. CSI Q Seminar

    "Probing quantum entanglement at the Electron Ion Collider"

    Presented by Dmitri Kharzeev, Stony Brook University and BNL

    Wednesday, December 18, 2019, 1:30 pm
    Training Room, Bldg 725

    Hosted by: Layla Hormozi

    The structure functions measured in deep-inelastic scattering are related to the entropy of entanglement between the region probed by the virtual photon and the rest of the hadron. This opens new possibilities for experimental and theoretical studies using the Electron Ion Collider. The real-time evolution of the final state in deep-inelastic scattering can be addressed with quantum simulations using the duality between high energy QCD and the Heisenberg spin chain.

  8. NSLS-II Friday Lunchtime Seminar

    "Operation at 500mA average current on the horizon"

    Presented by Alexei Blednykh, NSLS-II

    Friday, December 6, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Igna

    500mA average current achieved in NSLS-II. Limitations on the total average current will be discussed in details. Localized heating of the vacuum components was the major issue. Since the heating issues were resolved we were able to demonstrate 500mA during the beam study time. However, for the regular operation @500mA we need more power from the RF system to compensate the synchrotron radiation losses produced by the bending magnets, present and future insertion devices. To mitigate the heating issue and increase the beam stability, bunch lengthening will be beneficial for NSLS-II.

  9. NSLS-II Friday Lunchtime Seminar

    "In Situ & ACERT - The LANL-BNL Cathode Collaboration"

    Presented by John Smedley, Los Alamos National Laboratory

    Friday, November 22, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    The Applied Cathode Enhancement and Robustness Technologies (ACERT) capability at LANL and the in-situ x-ray analysis growth chamber at BNL are two of the premier tools available for development of photocathode technologies. We are following a model of innovation and collaboration to move cathodes from lab to application, guided by theory, modeling, and experimental validation. This presentation will focus on two recent technology advances – cathodes with "atomic armor", single monolayers of coatings to the cathode surface and/or substrate to improve lifetime and enable operating in inferior vacuum, and highly crystalline CsTe, providing evidence that better crystallinity can improve QE while supporting an ultra-smooth surface. We hope to engender both technical discussion in these areas and open the door to future collaborations. LA-UR-19-28272

  10. NSLS-II Friday Lunchtime Seminar

    "Local structures of Sn-doped BCZT lead-free ferroelectrics"

    Presented by Frederick Peter Marlton, Aarhus University, Denmark

    Friday, November 15, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

  11. NSLS-II Friday Lunchtime Seminar

    "Underpinning the nuclear fuel cycle with synchrotron and laboratory based X-ray absorption spectroscopy"

    Presented by Neil Hyatt, University of Sheffield, United Kingdom

    Friday, November 8, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Nuclear energy provides about 30% of the world's low carbon electricity supply, from more than 450 civil nuclear reactors. The supporting nuclear fuel cycle comprises a suite of industrial processes, which transform uranium ore into nuclear fuel, and support reactor operations, decommissioning, waste management, and geological disposal. This seminar will highlight three case studies in the application of X-ray absorption spectroscopy (XAS) in the nuclear fuel cycle, embracing environmental contamination, nuclear forensics, and radioactive waste management. In addition to exploitation of state of the art micro-focus multi-modal beamlines at synchrotron light sources, I will also show how we are using new developments in laboratory based XAS instrumentation, to probe element speciation in nuclear materials.

  12. CSI Q Seminar

    "Many-body physics with atoms and molecules under quantum control"

    Presented by Sebastain Will, Columbia University

    Thursday, November 7, 2019, 3 pm
    Conference room 201, Bldg 734

    Hosted by: Layla Hormozi

    Over the past decade, quantum simulators based on ultracold atoms have emerged as a powerful tool to address open questions in strongly interacting systems and nonequilibrium quantum dynamics that have relevance in all areas of physics, from strongly correlated materials to cosmology. Today, quantum simulators based on ultracold dipolar molecules are within experimental reach, which exploit long-range dipole-dipole interactions and will give access to new classes of strongly correlated many-body systems. In this talk, I will present our efforts towards quantum simulation with ultracold dipolar molecules. In trailblazing experiments we have demonstrated the creation of ultracold molecules via atom-by-atom assembly, which yields complete control over the molecular degrees of freedom, including electronic, vibrational, rotational, and nuclear spin states. Exploiting this control, we have observed long nuclear spin coherence times in molecular ensembles, which makes ultracold molecules an interesting candidate for the realization of a long-lived quantum memory. In addition, the dipole-dipole interactions between molecules can be flexibly tuned via external electrostatic and microwave fields. This motivates our current work towards two-dimensional systems of strongly interacting molecules, which promises access to novel quantum phases, will enable high-speed simulation of quantum magnetism, and points towards potential quantum computing schemes based on ultracold molecules. In the end, I will briefly present our new project on enhancing quantum coherence by dissipation in programmable atomic arrays. For this effort we will develop a novel nanophotonic platform that will enable trapping of individual atoms in optical tweezer arrays with unprecedented accuracy and high-speed tunability.

  13. NSLS-II Friday Lunchtime Seminar

    "Disentangling the nematode-microbiome interactions underlying long-term different crop rotation systems"

    Presented by Kaile Zhang, University of Florida

    Friday, October 25, 2019, 12:30 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Integrating two years of bahiagrass (Paspalum notatum) into conventional peanut (Arachis hypogea L.) and cotton (Gossypium hirsutum L.) cropping systems (bahiagrass-bahiagrass- peanut-cotton) improves soil quality and crop production compared with the conventional peanut-cotton-cotton rotation (CR). However, it is unclear if this system, known as a sod-based rotation (SBR), affects interactions within soil biota and if such interactions affect nutrient cycling and soil fertility. In this study, we collected soils from long-term plots under CR and SBR (located in Quincy, FL), before cotton planting. Our results showed that the metabolic activities of relative low trophic groups (i.e., bacterivores and herbivores) were positively correlated with r-strategists irrespective of cropping systems, but negatively with k-strategists only under CR. These demonstrated that microbial communities under higher rotational diversity contributed larger to C, energy, and nutrient flows in soil food webs relative to CR. Compared with SBR, one or more functional nematodes groups were entirely missing or showed few abundances, and less evenness of the microbial community was exhibited under CR in spite of no significant differences between these twoKo systems. These results imply that SBR with greater rotational diversity induced higher soil community diversity and consequently sustains the distribution of soil biological community, with positive effects on soil nutrient availability and the control of plant parasites.

  14. NSLS-II Friday Lunchtime Seminar

    "Plant-fungal symbiosis and their potential impacts on terrestrial biogeochemistry"

    Presented by Ko-Hsuan (Koko) Chen, University of Florida

    Friday, October 25, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Fungi are associated with all lineages of land plants. While plant-fungal symbiosis is common, many of their interactions, ranging from mutualism, commensalism, to parasitism are yet to be determined. As plant-fungal symbiosis are tightly linked to nutrient cycling, different interaction types have substantial impacts on biogeochemistry. Here, we will use two plant-fungal symbiosis examples: 1) Pine and their ectomycorrhizal fungi, and 2) mosses and their associated fungi, to illustrate how considering plant-fungal interaction and biogeochemistry together can further our understanding toward a better understanding of plant-fungal biology.

  15. NSLS-II Friday Lunchtime Seminar

    "Imaging antiferromagnetic domains using x-ray Bragg phase contrast at CSX beamline"

    Presented by Valery Kiryukhin, Rutgers University, New Jersey

    Friday, October 4, 2019, 10:30 am
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    We review our recent experiments on imaging antiphase antiferromgnetic domains at CSX-1. The technique utilizes interference effects revealing the domain boundaries. The measurements produce direct images, and are done in real time.

  16. NSLS-II Friday Lunchtime Seminar

    "Crystal Engineering of Lanthanide Metal-Organic Frameworks (Ln-MOFs): A Rational pproach to Designing Materials with Targeted Applications"

    Presented by Zeyar Min, Univ of the West Indies, Mona Campus, Jamaica

    Friday, September 27, 2019, 12:30 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Metal-organic frameworks (MOFs) are hybrid organic/inorganic structures with well-defined topologies which feature metal ions or clusters bridged by rigid organic linkers and have attracted immense interest for their catalytic, sensing, magnetic and adsorption properties among others. Their high porosity (surface areas of up to 7000 m2/g) can be exploited to encapsulate a wide variety of guest molecules and numerous possibilities for tunable characteristics arise from careful manipulation of both the organic and inorganic components. One of the crystal engineering approaches of MOFs is reticular synthesis and enables rational design and assembly of novel porous materials by utilizing building blocks with varying structures and functionalities to attain certain desired physical and chemical properties. However, reticular synthesis using lanthanide metals ions as building blocks is disinclined due to their high coordination numbers and unpredictable coordination chemistry. Herein, a new approach to the crystal engineering of Ln-MOFs, their ratiometric tunable luminescence properties and ability to sense metal ions and components of nitroaromatic explosives is presented.

  17. NSLS-II Friday Lunchtime Seminar

    "Quantum Computing on crystalline beams of ions: the concept and proof-of-principle experiments"

    Presented by Timur Shaftan, NSLS-II

    Friday, September 27, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    One of the promising directions in Quantum Computers (QC) is based on using ion traps. In a modern QC, several tens of ions are collected in an electromagnetic trap of a cm in size, with their motion cooled down to micro K temperature level, leading to entanglement of their quantum states, controlled by laser and RF fields. These ions = qubits then used to run quantum computations at unprecedent rate using specialized codes (check, for example, QuTip, Quantum Toolbox in Python). I will discuss a concept of a QC, which holds a promise to support 105 of qubits in contrast to the state-of-the-art devices. The idea is to use crystalline beams of ions in an accelerator as the medium for qubits. The crystalline beams were demonstrated in storage rings in 1980s when many protons, being cooled with electron beam formed a revolving ring with crystalline-like structure inside. Marrying this concept with that of the QC on a conventional ion trap, one might consider expansion of the QC to a large particle accelerator with high qubit capacity. The latter is important for expansion of QC capabilities, including the processing power and robustness against errors due to decoherence. In this presentation I will go over the concept and my analysis of a few challenges that require proof-of-principal experiments so that the some basic aspects of this interesting concept are validated.

  18. NSLS-II Friday Lunchtime Seminar

    "Non-trivial Spin Textures in Ferromagnetic Hetero-Interfaces"

    Presented by Ramesh C Budhani, Department of Physics, Morgan State University, Baltimore, MD

    Friday, September 20, 2019, 12:30 pm
    NSLS-II Bldg. 743 Room 156

  19. NSLS-II Friday Lunchtime Seminar

    "Towards Real Time Characterization of Grain Growth from the Melt"

    Presented by Christopher Wright, Department of Applied Physics and Applied Mathematics, Columbia University

    Friday, September 20, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Single crystal materials have unique properties which are endowed by their long ranging atomic order. Growing these crystalline materials can be difficult, as entropy favors disordered grains and the growth dynamics are poorly understood, leaving the process of making crystals prone to trial and error and limiting its application in the broader research community. In my talk I will discuss our work elucidating the microstructural dynamics of floating zone growth using x-ray scattering techniques. One focus of this work is building the computational infrastructure to process the large stream of heterogeneous data which results from these techniques. These pieces of infrastructure are then used to characterize the growth of Rutile crystals via a float zone furnace. Particular attention is paid to the competition amongst the grains, and how certain grains are selected from the plethora which are created at the beginning of the growth.

  20. NSLS-II Colloquium

    "Theoretical Understanding of Photon Spectroscopies in Correlated Materials In and Out of Equilibrium"

    Presented by Thomas Devereaux, SLAC

    Thursday, September 12, 2019, 4 pm
    Large Seminar Room, Bldg. 510

    Hosted by: John Hill

    Pending

  21. NSLS-II Friday Lunchtime Seminar

    "Coherent X-ray Scattering Studies of Surface Processes: Self-Organized Ion Beam Nanopatterning"

    Presented by Karl Ludwig, Boston University, MA

    Friday, August 23, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Karl Ludwig*, Mahsa Mokhtarzadeh*, Jeffrey Ulbrandt#, Peco Myint*, Suresh Narayanan+, and Randall Headrick# *Boston University / #University of Vermont +Advanced Photon Source, Argonne National Laboratory Enabled by the continued increases in brilliance available from synchrotron x-ray sources, our goal is to develop coherent x-ray scattering as a powerful new tool for the investigation of surface dynamics during growth and patterning processes. In particular, our research has been developed new approaches in X-ray Photon Correlation Spectroscopy (XPCS), using it to examine the dynamics of kinetic roughening in amorphous thin film growth, the step structure evolution in polycrystalline epitaxial growth and self-organized ion beam nanopatterning. Broad-beam low-energy ion bombardment can lead to the spontaneous formation of nanoscale surface structures, but the dominant mechanisms driving evolution remain controversial. Here I will describe our studies of the classic case of ion-beam rippling of SiO2 surfaces, in which we examine the relationship between the average kinetics of ripple formation and the underlying ?uctuation dynamics. In the early stage growth of ?uctuations we find a novel behavior with memory stretching back to the beginning of the bombardment. For a given length scale, correlation times do not grow signi?cantly beyond the characteristic time associated with the early-stage ripple growth. In the late stages of patterning, when the average surface structure on a given length scale is no longer evolving, dynamical processes continue on the surface. Nonlinear processes dominate at long length scales, leading to compressed exponential decay of the speckle correlation functions, while at short length scales the dynamics appears to approach a linear behavior consistent with viscous ?ow relaxation. This behavior is found to be consistent with simulations of a recent nonlinear growth model. In addition

  22. NSLS-II Seminar

    "2019 NSLS-II Summer Intern Mini-Symposium"

    Presented by John Hill, Welcome & will introduce 11 speaker, Interns with NSLS-II

    Thursday, August 1, 2019, 1 pm
    Large Seminar Room, Bldg. 510

    Hosted by: Lisa Miller

    Will forward flyer upon request (morello@bnl.gov)

  23. NSLS-II Friday Lunchtime Seminar

    "Quantum materials based on metamorphic InAsSb superlattices"

    Presented by Sergey Suchalkin, Stony Brook University, Stony Brook, NY

    Friday, June 28, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Recently proposed metamorphic InSbxAs1-x/InSbyAs1-y superlattices (SLs) manifest a new class of bulk materials where the bandgap can be tuned down to negative values [1,2]. Application of the virtual substrate approach relieves the limitation dictated by the substrate lattice constant and makes possible to grow materials with high crystalline quality in the entire range of alloy compositions. While remaining viable candidates to compete with the state-of-the-art mercury-cadmium-telluride (MCT) compound materials in the field of infrared detection and imaging, the new low-bandgap InAsSb SLs are new platform for investigation of intriguing physical phenomena such as the quantum spin Hall effect, and Majorana zero modes which has recently appeared in the searchlight of solid-state physics. I will present the latest results on experimental and theoretical analysis of carrier dispersion and band structure of short period metamorphic InSbxAs1-x/InSbyAs1-y superlattices, obtained in the Optoelectronics group of Stony Brook University. We demonstrate that the Dirac dispersion is realized in short period InAs1-x Sbx/InAs1-ySby metamorphic superlattices with the bandgap tuned to zero by adjusting the superlattice period and layer strain [3,4]. It was shown that the new material has anisotropic carrier dispersion: the carrier energy associated with the in-plane motion is proportional to the wave vector and characterized by the Fermi velocity vF, the dispersion corresponding to the motion in the growth direction is quadratic. Remarkably, the Fermi velocity in this system can be controlled by varying the overlap between electron and hole states in the superlattice [3]. We present a picture of modification of the energy spectrum due to variation of layer thicknesses, strain and composition of the SLs. The effects of dimensional quantization, tunneling and interface scattering on the SL band structure will be discussed. 1 - G. Belenky, D. Wang, Y. Lin, D. Donetsk

  24. NSLS-II Friday Lunchtime Seminar

    "Recent progress on the electronic structure study of the heavy-fermion Ce-115 compounds"

    Presented by Qiuyun Chen, Science and Technology on Surface Physics and Chemistry Laboratory, China

    Friday, June 21, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Here we performed a combined bulk-sensitive soft x-ray angle-resolved photoemission spectroscopy (ARPES) and Ce 4d-4f resonant ARPES studies of the three parent compounds of the Ce-115 system: CeCoIn5, CeRhIn5, and CeIrIn5. In CeCoIn5, we spectroscopically resolved the development of band hybridization and the Fermi surface expansion over a wide temperature region. Unexpectedly, the localized-to-itinerant transition occurs at surprisingly high temperatures, yet f electrons are still largely localized even at the lowest temperature. These findings point to an unanticipated role played by crystal field excitations in the strange metal behavior of CeCoIn5. In CeRhIn5, we have directly observed a weakly dispersive heavy quasiparticle band in this heavy fermion compound, whose f-electrons are considered most fully localized. Two of the three crystal-electric-field (CEF) split levels of the Ce 4f5/21 states have been observed at 2.5 and 10 meV above the Fermi energy, with distinctive symmetries. The hybridization mainly happens between these states and Rh 4d band near the Brillouin zone center, on the most three-dimensional Fermi pocket. Remarkably, the f electrons start to turn itinerant at the highest sampling temperature, 180 K, a high temperature scale that is known to be consistent with the CEF splitting. In this important heavy fermion compound with antiferromagnetic state, we paint a comprehensive picture of the dual nature of the f electrons. In CeIrIn5, we find similar behaviors of the f electrons with that of CeCoIn5, and the hybridization also starts at much higher temperature than Tk. We also provide the first experimental evidence for 4f7/21 splittings which, in CeIrIn5, split the octet into four doublets. Our results offer a comprehensive and in part, unanticipated experimental picture of the heavy fermion formation, setting the stage for understanding the emergent properties, including unconventional superconductivity, in this and related material

  25. NSLS-II Friday Lunchtime Seminar

    "High resolution strain measurements and phase discrimination in solid solutions using X-Ray Diffuse Multiple Scattering (DMS)"

    Presented by Gareth Nisbet, Diamond Light Source, United Kingdom

    Friday, June 14, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    DMS is a new high resolution scattering technique which manifests as diffraction lines impinging on the detector plane, similar to Kikuchi lines or Kossel lines. I will explain how multiple intersections from coplanar and non-coplanar reflections can be used for phase discrimination in multi-phasic systems by following a simple reductive procedure. The methods will be demonstrated using data from complex PMN-PT and PIN-PMN-PT ferroelectric solid solutions. I will also show how convolutional neural networks are being applied to DMS data for phase discrimination.

  26. NSLS-II Friday Lunchtime Seminar

    "Status and perspective of high-energy automotive batteries"

    Presented by Richard Schmuch, University of Munster, Germany

    Friday, June 7, 2019, 12:30 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    This presentation gives an overview of the materials, performance requirements and cost of current automotive traction batteries based on Li-ion technology. It also includes important aspects related to electromobility, such as its sustainability and energy efficiency. As current Li-Ion batteries with intercalation-type active materials are approaching their physicochemical energy density limit of roughly 300 Wh/kg or 800 Wh/L, alternative technologies such as lithium-metal based all-solid-state batteries (ASSBs) currently intensively studied, which promise an energy density of up to 1000 Wh/L. The potential and challenges of this and other post Li-ion batteries (e.g. Dual-Ion, Mg-Ion, Li-Sulphur) are discussed and also compared by systematic bottom-up energy density calculations. Through a step-by-step analysis from theoretical energy content at the material level to practical energies at the cell level, the individual advantages and shortcomings of the studied battery types are elucidated. Literature: (1) Schmuch, R.; Wagner, R.; Hörpel, G.; Placke, T.; Winter, M. Performance and Cost of Materials for Lithium-Based Rechargeable Automotive Batteries. Nat. Energy 2018, 3 (4), 267–278. (2) Betz, J.; Bieker, G.; Meister, P.; Placke, T.; Winter, M.; Schmuch, R. Theoretical versus Practical Energy: A Plea for More Transparency in the Energy Calculation of Different Rechargeable Battery Systems. Adv. Energy Mater. 2018, 1803170, 1803170. (3) Placke, T.; Kloepsch, R.; Dühnen, S.; Winter, M. Lithium Ion, Lithium Metal, and Alternative Rechargeable Battery Technologies: The Odyssey for High Energy Density. J. Solid State Electrochem. 2017, 1–26. (4) Meister, P.; Jia, H.; Li, J.; Kloepsch, R.; Winter, M.; Placke, T. Best Practice: Performance and Cost Evaluation of Lithium Ion Battery Active Materials with Special Emphasis on Energy Efficiency. Chem. Mater. 2016, 28 (20), 7203-7217

  27. NSLS-II Friday Lunchtime Seminar

    "Longitudinal Coupling Impedance and Single-Bunch Instability"

    Presented by Alexei Blednykh, NSLS-II

    Friday, June 7, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Several instability thresholds and special waveform beam pattern have been observed during measurements of the electron beam energy spread σ_δ versus single-bunch current I_0 in NSLS-II. The experimental data have been collected from: the synchrotron light monitor (SLM) camera installed in a low dispersion area of the NSLS-II storage ring, the Full-Width Half-Maximum size of the In-Vacuum Undulator harmonic, the stripline kicker as a part of the bunch-by-bunch transverse feedback system and the large gap dipole chamber of Optical Extraction Beamline in NSLS-II. With mentioned measurement techniques we were able to confirm, that the microwave beam pattern behavior as a current dependent effect. The numerical simulations of the Vlasov-Fokker-Planck (VFP) equation with the longitudinal impedance budget simulated by the GdfidL code for a 0.3mm bunch length and the total longitudinal wakepotential W_(||,tot)(s), allowed us to reproduce the energy spread dependence on the single bunch current numerically for different lattices, bare lattice and regular operational lattice with all insertion devices magnet gap closed, including 3 damping wigglers. The present talk will be based on the results published in the Scientific Reports, 2018: A. Blednykh, B. Bacha, G. Bassi, W. Cheng, O. Chubar, A. Derbenev, R. Lindberg, M. Rakitin, V. Smaluk, M. Zhernenkov, Yu-chen Karen Chen-Wiegart and L. Wiegart, "New aspects of longitudinal instabilities in electron storage rings", Scientific Reports volume 8, Article number: 11918 (2018).

  28. NSLS-II Friday Lunchtime Seminar

    "Microspectroscopy of Extraterrestrial Materials, or, The Universe Viewed Through a Microscope"

    Presented by Paul Northrup, Stony Brook University

    Friday, May 31, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Synchrotron X-ray absorption fluorescence spectromicroscopy is an essential tool for characterization of heterogeneous (and often very small) extraterrestrial materials. A NASA-funded research program utilizes the TES (8-BM) and XFM (4-BM) to study composition and chemistry of extraterrestrial materials, especially focusing on return-mission samples. Of particular interest are Phosphorus and Sulfur compounds that may be either a) organic evidence of life, or b) precursors or critical raw materials for development of life, on early Earth or elsewhere. Initial samples include meteorites, interplanetary dust particles, and Lunar materials. Current sample-return missions (NASA OSIRIS REx and Japan's Hayabusa2) will retrieve material from distant asteroids in a few years. Future missions will return samples from Mars.

  29. NSLS-II Friday Lunchtime Seminar

    "THz vortex beam as a spectroscopic probe of magnetic excitations"

    Presented by Andrei A. Sirenko, New Jersey Institute of Technology, NJ

    Friday, May 24, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Circularly polarized light with spin angular momentum (SAM) is one of the most valuable probes of magnetism. We demonstrate that light beams with orbital angular momentum (OAM), or vortex beams, can also couple to magnetic excitations exhibiting dichroisms in a magnetized medium. In our recent experiments with coherent THz beams we observed that resonant optical absorption in a ferrimagnetic crystal of Dy3Fe5O12 depends strongly on both the handedness of the vortex and direction of the beam propagation with respect to the sample magnetization. This effect exceeds the conventional dichroism for conventional circularly polarized light. Our results demonstrate the potential of the vortex beams with OAM as a new spectroscopic probe of magnetism in matter. A possibility to convert synchrotron radiation at the 22-IR-2 MET beamline into a vortex beam and use it for materials spectroscopy will be also discussed in this talk. In collaboration with T. N. Stanislavchuk1, P. Marsik2, C. Bernhard2, V. Kiryukhin3, S-W. Cheong3, and G. L. Carr4 1 Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 2 Department of Physics, University of Fribourg, Switzerland. 3 Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University 4 NSLS-II, Brookhaven National Lab

  30. NSLS-II Friday Lunchtime Seminar

    "MAXPD: Multi-Anvil X-ray Powder Diffraction — COMPRES Partner User Program for High Pressure Studies at 28-ID-2-D"

    Presented by Matthew L. Whitaker, Stony Brook University

    Friday, May 17, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    MAXPD is the downstream endstation of XPD, an insertion device beamline at Sector 28 (28-ID-2-D) of NSLS-II. The MAXPD endstation and General User Program are sponsored by the COnsortium for Materials Properties Research in Earth Sciences (COMPRES). MAXPD has an 1100-ton hydraulic press installed, which is equipped with a unique DT-25 pressure module that can be swapped out for a more standard D-DIA module as desired. MAXPD makes use of the world-class monochromatic beam available at XPD (usually ~67 keV), with which we collect both angular dispersive X-ray diffraction data and X-radiographic imaging. The first General User experiments took place in March 2018. Final Science Commissioning beamtime took place in August of last year, and the full General User program for MAXPD began in the 2018-3 cycle. In this seminar, I will give an overview of the science drivers behind the development of the endstation, some of its unique capabilities, some representative results from recent experiments conducted over the last two cycles at MAXPD, and where we are looking to go as we look to the future.

  31. NSLS-II Friday Lunchtime Seminar

    "Self-assembly of anisotropic nanocrystals from crystalline to quasicrystalline structures"

    Presented by Ou Chen, Brown University, Rhode Island

    Friday, May 10, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Anisotropic nanocrystals with defined composition, shape and surface patchiness represent a unique class of building objects for constructing high-order architectural nanomaterials. When utilized in assembly, anisotropic nanocrystals can display strong asymmetric interactions induced by the patchiness that may complicate the formation of ordered structures compared to the assemblies of isotropic building blocks. In this talk, I will use several types of anisotropic 'patchy' nanocrystals as examples to demonstrate how they assemble into the unprecedented superstructures through the directional interactions among the building blocks under an enthalpy-driven condition. Both translational periodicities and orientational ordering of the final superstructural materials will be discussed. The dominating driving forces lead to the obtained architectures will be identified through molecular dynamics computer simulations and experimental results.

  32. NSLS-II Friday Lunchtime Seminar

    "In situ studies of Zr-based MOFs for nerve-agents capture and decomposition"

    Presented by Anna M. Plonka, Stony Brook University, Dept. of Mat. Sci. & Chem. Eng.

    Friday, May 3, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Effective filters for the rapid decomposition of chemical warfare agents (CWAs) are in high demand for protecting military and civilian populations. Although many new materials, such as metal-organic frameworks (MOFs), have been proposed to use as CWA filtration media, their eventual transition requires a detailed understanding of the atomic-scale reaction mechanisms. Zr-based MOFs were recently shown to be among the fastest catalysts of nerve-agent hydrolysis reaction in solution. We show the results of a detailed study of the adsorption and decomposition of a nerve-agent simulant, dimethyl methylphosphonate (DMMP), on Zr-based MOFs, that have different pore sizes and connectivities, using synchrotron-based X-ray powder diffraction, X-ray absorption and infrared spectroscopy, which reveals key aspects of the reaction mechanism. Further, we evaluate how battle-field contaminants such as CO2 can influence effective detoxification of CWAs by Zr-based MOF-808.

  33. NSLS-II Friday Lunchtime Seminar

    "Coherent X-ray measurement of local step-flow propagation during growth of polycrystalline organic semiconductor thin films"

    Presented by Randall Headrick, University of Vermont

    Friday, April 26, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    Vacuum deposition of C60 on a graphene-coated surface is investigated with X-ray Photon Correlation Spectroscopy in surface-sensitive conditions. Local step-flow is observed through the observation of oscillatory correlations in the later stages of growth after crystalline mounds have formed. An important aspect of the work is that coherent X-rays do not average over complex structures, and this allows us to monitor the growth on polycrystalline surfaces without loss of information. The experimental results show that the step-flow velocity must be nonuniform, and we model the velocity of each step-edge as being a simple function of the lengths of the terraces above and below it. This model predicts that the steps become almost stationary near the edges of the mounds where the local terrace length is very small, and the average slope of the surface is large. It was not previously known that such nonuniform and disordered step arrays as we have observed would follow such a simple growth law. This work shows that the use of coherent X-ray scattering provides an approach to better understand surface dynamics and fluctuations during crystal growth.

  34. NSLS-II Friday Lunchtime Seminar

    "Wireless Sensors, and updates to areaDetector with Computer Vision"

    Presented by Kazimierz Gofron, NSLS-II

    Friday, April 12, 2019, 12 pm
    NSLS-II Bldg. 743 Room 156

    Hosted by: Ignace Jarrige

    by K. Gofron, M. Rolland, J. Wlodek, The series of brief talks that concentrate on EPICS controls 1. Wireless sensors controlled from EPICS 2. Improvements to Area Detector at NSLS2 A. Low Energy, Low Cost: The Nordic Thingy:52 Sensor Suite 1. Wireless technologies 2. EPICS controls of wireless sensors 3. ioc components 4. Integrated into CSS, and clients B. Improvements to Area Detector deployment and features at NSLS2 1. ADPluginBar/Dmtx – QR Code and data matrix code readers for EPICS Area Detector 2. ADLambda – Adding new features to an existing driver, and updating to build on newer OS 3. ADCompVision – Bringing Computer Vision to Area Detector 4. ADUVC – An area detector driver for USB Video Class devices 5. ADEmergentVision – An area detector driver for Emergent Vision Technologies 10 GigE and 25 GigE cameras

  35. NSLS-II Colloquium

    "NASA's Mars 2020 Mission – First Steps Towards Mars Sample Return"

    Presented by Kenneth Farley, Caltech

    Thursday, April 11, 2019, 4 pm
    Large Seminar Room, Bldg. 510

    Hosted by: John Hill

    Scientists have advocated for the return of samples from Mars for decades. The quest has finally begun in earnest: the Jet Propulsion Laboratory is in the final stages of construction of the Mars 2020 mission. Mars 2020 builds on the highly successful design of the Mars Science Laboratory (Curiosity Rover) and is updated with new landing capabilities, scientific instruments, and a very sophisticated rock sample collection system. Mars 2020's chief goals are to unravel the geology of its landing site, seek evidence of potential Martian biosignatures, and prepare a cache of several dozen samples for possible return to Earth by a future element of a notional Mars Sample Return campaign. NASA recently selected the mission's destination: Jezero Crater. This crater once held a very deep lake comparable in size to Lake Tahoe. Key geologic targets at the site include ancient Martian bedrock, lake sediments and especially a remarkably preserved river delta, and unusual carbonate-bearing rocks possibly precipitated from lake-water. Mars 2020 will launch in the summer of 2020, land on February 18, 2021, and rove the surface for at least two years. I am Project Scientist for Mars 2020 and will describe the goals and development of this mission, and of Mars sample return.

Currently showing events from the past year. See all past events »

  1. MAY

    18

    Monday

    NSLS-II and CFN Users' Meeting

    May 18-20, 2020

  2. JUL

    15

    Wednesday

    Workshop on Resonant Inelastic and Elastic X-ray Scattering 2020

    July 15-17, 2020

  1. LiX Solution Scattering Workbench 2020

    February 13-15, 2020

  2. Short Course on X-ray Absorption Fine Structure: Theory, Data Analysis and Modeling (XAFS 2019)

    November 13-15, 2019

  3. Exploring New Science Frontiers at NSLS-II

    October 21-23, 2019

  4. LiX Solution Scattering Workbench (2019-3)

    September 23-25, 2019

  5. Teacher Training: Exploring Proteins with a New Light

    July 1-3, 2019

  6. 11th International Conference on Inelastic X-ray Scattering (IXS2019)

    June 23-28, 2019

  7. 4th International Conference on Resonant Elastic X-ray Scattering (REXS 2019)

    June 17-21, 2019

  8. LiX Solution Scattering Workbench

    May 29-31, 2019

  9. 2019 NSLS-II & CFN Joint Users' Meeting

    May 20-22, 2019

  10. In Celebration of International Women's Day 2019

    March 8, 2019

  11. LiX Solution Scattering Workbench

    February 14-16, 2019

  12. Short Course: Introduction to X-ray Absorption Spectroscopy

    November 6-8, 2018

  13. NOBUGS 2018: New Opportunities for Better User Group Software

    October 22-26, 2018

  14. NSLS-II Pair Distribution Function School 2018

    September 17-19, 2018

  15. 10th International Workshop on X-ray Radiation Damage to Biological Samples

    September 13-14, 2018

  16. Coherence 2018: International Workshop on Phase Retrieval and Coherent Scattering

    June 24-28, 2018

  17. 2018 NSLS-II and CFN Users' Meeting

    May 21-23, 2018

  18. Data Analysis and Modeling of XANES and EXAFS Spectra: Applications to Nanomaterials

    November 1-3, 2017

  19. Synchrotron Environmental Science Symposium 7: Illuminating the Links Between Environmental Science and Human Health

    October 30 - November 1, 2017

  20. 2017 NSLS-ll and CFN Users' Meeting

    May 15-17, 2017

  21. High-Brightness Synchrotron Light Source Workshop

    April 26-27, 2017

  22. X-ray Absorption Fine Structure Spectroscopy (XAFS) Short Course: Principles and Applications

    November 2-4, 2016

  23. 14th International Conference on Surface X-ray and Neutron Scattering (SXNS14)

    July 10-14, 2016

  24. 2016 NSLS-ll and CFN Users' Meeting

    May 23-25, 2016

  25. Short Course: Advanced Topics in XAFS Data Analysis and Modeling

    November 5-7, 2015

  26. 8th International Workshop on Infrared Microscopy and Spectroscopy using Accelerator Based Sources

    October 11-15, 2015

  27. Collaboration Meeting on "Simulation and Modeling for SR Sources and X-Ray Optics"

    October 1-2, 2015

  28. NSLS-II Strategic Planning Workshop

    September 24-25, 2015

  29. 23rd International Congress on X-ray Optics and Microanalysis (ICXOM23)

    September 14-18, 2015

  30. Complementary Methods in X-ray Spectroscopic, Structural, and Imaging Techniques

    July 13-14, 2015

  31. 12th International Conference on Synchrotron Radiation Instrumentation (SRI 2015)

    July 6-10, 2015

  32. BES Facilities Computing Working Group Meeting - May 21-22, 2015

    May 21-22, 2015

  33. 2015 NSLS-II & CFN Joint Users' Meeting

    May 18-20, 2015

  34. First Science at the ABBIX Beamlines

    April 21-22, 2015

  35. Short Course: Methods and Applications of X-Ray Absorption Fine Structure Spectroscopy

    November 13-15, 2014

  36. NSLS "Last Light"

    September 30, 2014

  37. Remote Access Data Collection: Automation and Robotics at the SSRL Protein Crystallography Beam Lines

    July 17-18, 2014

  38. Joint NSLS/NSLS-II & CFN Users' Meeting

    May 19-21, 2014

  39. X9 SAXS Workbench

    April 24-27, 2014

  40. Industrial Research at NSLS-II

    April 8-9, 2014

  41. X6A Workbench: Hands-on Synchrotron Structural Biology

    February 25-28, 2014

  42. X6A Workbench: Hands-on Synchrotron Structural Biology

    October 29 - November 1, 2013

  43. In-situ Methods of X-ray Absorption Spectroscopy

    October 24-26, 2013

  44. NSLS-II Early Experiment Workshop: IXS Focused Session

    October 1, 2013

  45. NSLS-II First-Experiments Workshop

    August 12-13, 2013

  46. X6A Workbench: Hands-on Synchrotron Structural Biology

    June 25-28, 2013

  47. NSLS and CFN Users' Meeting

    May 20-22, 2013

  48. Seventh International Workshop on Radiation Safety at Synchrotron Radiation Sources

    May 8-10, 2013

  49. RapiData 2013

    April 21-26, 2013

  50. X9 SAXS Workbench

    April 18-21, 2013

  51. MXLS13 "New Opportunities for Magnetic Dynamics and Materials at NSLS-II and MAX-IV”

    March 24-28, 2013

  52. X6A Celebrates Its 10th Anniversary!

    February 1, 2013

  53. X6A Workbench: Hands-on Synchrotron Structural Biology

    January 28 - February 1, 2013

  54. XANES Short Course: Theory, Analysis, Applications

    November 8-10, 2012

  55. X9 SAXS Workbench

    September 20-23, 2012

  56. Rock & Cell: From the Meso- to the Nanoscale with X-ray Spectromicroscopy

    September 17-18, 2012

  57. X9 SAXS Workbench

    June 21-24, 2012

  58. Crystallography Workbench

    June 11-13, 2012

  59. Synchrotron Radiation in Art and Archaeology

    June 5-8, 2012

  60. Synchrotron Radiation in Art and Archaeology (SR2A)

    June 5-8, 2012

  61. 2012 NSLS/CFN Joint Users' Meeting

    May 21-23, 2012

  62. Operando IV

    4th International Congress on Operando Spectroscopy

    April 29 - May 3, 2012

  63. 4th International Congress on Operando Spectroscopy

    April 29 - May 3, 2012

  64. Joint InSynC-INCREASE Workshop

    April 18-19, 2012

  65. X6A Workbench: Hands-on Synchrotron Structural Biology

    March 27-30, 2012

  66. X9 SAXS Workbench

    March 8-10, 2012

  67. XAFS Short Course: Introduction to the Experiment, Data Analysis and Modeling

    November 3-5, 2011

  68. X9 SAXS Workbench

    October 13-16, 2011

  69. Photon Sciences Users' Executive Committee and Town Meetings

    August 12, 2011

  70. Materials Diffraction Suite Workshop

    July 18-20, 2011

  71. 2011 NSLS/CFN Users' Meeting

    May 23-25, 2011

  72. Workshop on Supercritical Carbon Dioxide-Materials Interactions

    March 21-23, 2011

  73. Advanced Topics in XAFS Data Modeling

    November 4-6, 2010

  74. EPICS Collaboration Meeting - Fall 2010

    October 7-14, 2010

  75. 2010 Joint NSLS and CFN Users Meeting

    May 24-26, 2010

  76. In Situ and Operando XAFS Experiments and Data Analysis

    October 22-24, 2009

  77. MX Frontiers at the One Micron Scale

    July 23-24, 2009

  78. The Experimental Program to Stimulate Competitive Research (EPSCoR) Review 2009

    July 20-23, 2009

  79. INCREASE Workshop

    Interdisciplinary Consortium for Research and Educational Access in Science and Engineering

    July 15-17, 2009

  80. International Workshop for New Opportunities in Hard X-ray Photoelectron Spectroscopy: HAXPES 2009

    May 20-22, 2009

  81. 2009 NSLS / CFN Users' Meeting

    May 18-20, 2009

  82. Applications of Synchrotron Techniques in Glass Research

    April 6-7, 2009