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X-RAY RUNS: Apply for Beamtime

2017  Nov 1 - Dec 21

2018  Feb 7 - Apr 3
2018  Proposal/BTR deadline: 12/1/17

2018  Apr 11 - Jun 4
2018  Proposal/BTR deadline: 2/1/18

 

Hard X-ray Spectroscopies and Imaging

 

Date: June 20 and 21
Local Organizers: Ken Finkelstein, Rong Huang, Arthur Woll
External Co-organizers: Ian Coulthard (Canadian Light Source), Serena DeBeer (Max Planck Institut), Kyle Lancaster (Cornell University)

 

Advances in synchrotron sources, optics, and detectors have enabled and will continue to spark new approaches and applications in advanced x-ray spectroscopy and microscopy. X-ray spectroscopies are powerful, element specific probes of composition, spatial distribution, and local electronic structure in complex materials. For example x-ray emission spectroscopy has been used to monitor the spin of metal active sites such as Mn in the oxygen evolving complex (OEC) in PSII. This dual-session workshop will explore opportunities in each of these areas at CHESS enabled by upgrade to single beam operation with undulator sources.

Parallel session 1 - High resolution x-ray spectroscopy: Advanced x-ray spectroscopic techniques such as x-ray resonant and non-resonant emission, inelastic, and Raman scattering are powerful tools that go beyond elemental analysis to give precision information on electronic structure and excitations in solids and liquids. These photon-in photon-out core-level spectroscopies are element and site specific probes of valence electron states, and 3rd generation synchrotron sources have enabled or revolutionized the methods.

Two-color X-ray Emission Spectroscopy(XES): A Novel Probe for Biological Catalysis


The active site of ribonucleotide reductase, from human pathogen Chlamydiatrachomatis, contains a bi-metallic Mn-Fe cofactor (left). During the catalytic cycle, Ct RNR undergoes proton-coupled electron transfer reactions and passes through a MnIVFeIII intermediate. It is not known where the protonation events occur, and Kβ XES is one of the few spectroscopic techniques capable of answering this question. Simultaneous 2-color XES (right) reveals the Mn(II)Fe(II) chemical state of the enzyme resting state. Protein concentration was ~2 mM.

Parallel session 2 - Synchrotron-radiation based hard x-ray microscopy: Advanced, SR-based x-ray microscopies are finding increasing application in a broad array of fields, including biology, geology, and cultural heritage applications. This growth is driven by many factors – especially the routine availability of micron- and sub-micron-scale x-ray beams, novel detection schemes and detector technology, as well as new and growing user communities in a wide variety of application areas – from biology to cultural heritage. This session will bring world leaders in synchrotron science and application areas to explore and identify the most exciting scientific and instrumentation targets for CHESS to pursue in the context of an upgrade. Particular areas of emphasis are: 1) applications in biology, especially plant sciences, 2) opportunities for x-ray microprobe work at high incident energy (30-90 keV), and 3) critical optics and detector technologies required to fully capitalize on these opportunities.

Speakers: Uwe Bergmann (Stanford Linear Accelerator Center), Ian Coulthard (Canadian Light Source), Serena DeBeer (Max Planck Institut), Emil Hallin (University of Saskatchewan), Yeukuang Hwu (Institute of Physics, Academia Sinica), Jan Kern (Lawrence Berkeley National Laboratory), Chris Pollock (Pennsylvania State University), John Rehr (University of Washington), Abdul Rumaiz (Brookhaven National Laboratory), Sarvjit Shastri (Argonne National Laboratory), John Tse (University of Saskatchewan), Lisa Van Loon (Canadian Light Source), Frederik Vanmeert (University of Antwerp), Olena Vatamaniuk (Cornell University), Stefan Vogt (Argonne National Laboratory)

 

Talks & Abstracts • Participants

 

Sunday, June 19

Arrive in Ithaca.

Monday, June 20

8:00

Registration & Coffee

PSB West Pavilion

8:30

Welcome, Description of Upgrade, Workshop Goals: Joel Brock (Director, CHESS)

Watch Morning Session Live on YouTube

PSB 120

8:55

Serena DeBeer (Max Planck Institute for Chemical Energy Conversion and Cornell University) "Making and Breaking Bonds: New Insights into Catalytic Processes Using Advanced X-ray Spectroscopic Approaches"

PSB 120

9:40

Stefan Vogt (Argonne National Laboratory) "X-ray Fluorescence Microscopy: Advances and New Opportunities with Upgraded Light Sources"

PSB 120

10:20

BREAK - PSB South Passageway, then split into Parallel Subsessions:

Session 1: Watch Live on YouTube
HARD X-RAY SPECTROSCOPY
PSB 120

Session 2: Watch Live on YouTube
IMAGING & MICROSCOPY
PSB 401

Breadth of Scientific Opportunities

Plant Sciences

10:40

John Tse (University of Saskatchewan) "Applications of inelastic scattering"

10:40

Olena Vatamaniuk (Cornell University) "Characterization of Iron and Copper Homeostasis in Plants via the Integration of Molecular Physiology, Functional Genomics and Synchrotron X-ray Fluorescence Imaging"

11:25

Uwe Bergmann (SLAC National Accelerator Laboratory) "High-resolution photon-in photon-out spectroscopy and imaging with hard X-rays"

11:10

Emil Hallin (University of Saskatchewan) "Minimally invasive characterization of plant phenotypes (above and below ground) using high brightness hard x-rays: supporting rational crop design to help feed a hungry planet with synchrotron science"

11:40

Arthur Woll (CHESS) "Direct, 3D-resolved x-ray microscopy at the micron-scale"

12:15

GROUP PHOTO - Clark Atrium

12:20

LUNCH - Clark Atrium

Biological Science and Theoretical Approaches

Instrumentation

1:20

Jan Kern (Lawrence Berkeley National Lab) "Combining X-ray crystallography and spectroscopy to study reaction mechanisms of metallo-enzymes: Studies on Photosystem II at SR and XFEL sources"

1:30

Sarvjit Shastri (Advanced Photon Source) "Direct and Reciprocal Space High-Energy X-Ray Imaging at the APS and APS-U"

2:05

Chris Pollock (Pennsylvania State University) "Interrogating Metallo-enzyme Intermediates using Two-Color K-beta X-ray Emission Spectroscopy"

2:00

Abdul Rumaiz (Brookhaven National Laboratory) "Detector development for NSLS II (and other light source)"

2:50

John J Rehr (University of Washington) "Theory and Calculations of Core-level X-ray Spectra Beyond Quasiparticles"

2:30

Yeukuang Hwu (Institute of Physics, Academia Sinica) "Full-Field X-ray microscopy using Fresnel zone plate"

3:35

BREAK - PSB South Passageway

3:00

BREAK - PSB South Passageway

Perspectives and Challenges: Viewed from other sources

High Energy Microprobe & Cultural Heritage Applications

3:50

Klaus Attenkofer (BNL/NSLS-II) "Spectromicroscopy and the Real-World Needs"

3:20

Ian Coulthard (Canadian Light Source) "Concept for a High Energy X-ray Fluorescence Microprobe Beamline at CHESS"

4:35

Robert Gordon (Simon Fraser University) "Applied Spectroscopy and Critical Materials: Rare Earths"

3:50

Frederik Vanmeert (University of Antwerp) "X-ray powder diffraction mapping and tomography for the investigation of pigments and their degradation products in oil paintings"

5:15

Close-out and acknowledgements - Ken Finkelstein (CHESS)

4:20

Lisa Van Loon (Canadian Light Source) "Analysis of Electrum Coins by Synchrotron X-ray Techniques"

6:00

DINNER - Wilson Laboratory

Tuesday, June 21

9:00

Discussion / Writing Session; break into Subsessions:

Session 1:
HARD X-RAY SPECTROSCOPY
Wilson 301

Session 2:
IMAGING & MICROSCOPY
Wilson 374

12:00

END