Overview
![SPEAR3 SPEAR3](/ssrl/web/sites/default/files/images/bl-placeholder.jpg)
6-pole, 2-Tesla Wiggler, 2 mrad Acceptance Side Station
Beam line 9-3 is a wiggler side-station dedicated to biological x-ray absorption spectroscopy and EXAFS measurements of dilute solutions and single crystals. BL9-3 is equipped with a 100-element Ge monolithic solid-state detector in addition to ionization chambers and PIPS/Lytle detectors. A dedicated LHe cryostat allows for routine low temperature measurements on solutions. A Huber-Kappa goniometer, a LHe cryostream, a focusing polycapillary and a MAR CCD detector are available (in addition to specialized software) for single crystal measurements. The higher flux, tighter focus and excellent beam stability on BL9-3 is ideal for very dilute samples and single crystals of appropriate dimensions.
Sample Environment —
Minimum Sample Requirement | 500 μM, 100 μl solutions; 10 ppm, 10 mg solids; > 5 single crystals of appropriate dimensions |
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Sample size | 5 x 20 mm >gt 100 μm (all dimensions, for single crystal) |
Sample temperature | 10-200 K (solution), 20-50 K (single crystal) or Room Temperature |
Other | Ambient pressure experiments |
Instrumentation —
Detectors | Ionization chambers, PIPS, Lytle, Canberra 100-element Ge monolith solid-state, MAR IP or CCD for single crystal XAS |
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Cryostat | Oxford LHe cryostat (4-200 K), LHe cryostream for single crystal XAS (>10 K) |
Other | Shutter and variable filters to alleviate beam damage, Soller slits and scatter-guard, Huber Kappa Goniometer for single crystal XAS, multiple-sample holder for room temperature samples. Automatic scan queueing available for multiple room temperature samples and/or multiple spots on cold samples. |
Specifications
Technical Specifications
Energy —
Energy Range | Resolution ΔE/E | Spot Size | Flux | |
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Focused | 5000-30000 eV | 1 x 10-4 | 1 x 4 mm2 | ~2 x 1012 |
Optics —
M0 Mirror | M1 Mirror | Monochromator |
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Vertically collimating, flat, bent, 1 m, Si, Rh-coated | Cylindrical, bent, 1.2 m, Zerodur, Rh-coated | LN2 cooled, Si(220), ϕ = 0o & 90o. double-crystal, non-fixed exit slit Monochromator Crystal Glitch Library |
Absorption —
768 microns Be, 205 microns C |
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Publications
Publications
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Highlights
Science Highlights
Beam Line 9-3 Science Highlights
Functional CeOx Nanoglues for Robust Atomically Dispersed Catalysts
Shared-Ligand Intermediates of Metal Exchange Visualized by Rapid Freeze Quench and Selenium EXAFS of Se-Labeled Metallochaperones. A Paradigm for Studying Copper-Mediated Host-Pathogen Interactions
New Method Tracks Metal-ion Movement in Periplasmic Proteins
Biomimetic Model Studies Reveal the Role of the Ca2+ Ion in Photosystem II
Unusual Structure and Dynamics of an Artificial Enzyme Created in a Test Tube
A New Slant on a Cellular Balancing Act — the Copper-sensing Repressor of Mycobacterium tuberculosis
Structural Insights into FeMo Cofactor Biosynthesis
An Octahedral Coordination Complex of Iron(VI)
A Fern Fatale - X-ray Absorption Spectroscopy Imaging of an Arsenic-Loving Fern
Where Water is Oxidized to Dioxygen: Structure of the Photosynthetic Mn4Ca Cluster
Reexamination of Lead(II) Coordination Preferences in Sulfur-Rich Sites:Implications for a Critical Mechanism of Lead Poisoning
Damage by X-rays: A Case Study for Metallo-Protein Crystallography
Characterization of a Genuine S=1/2 Fe(V) Complex
Fighting Antibiotic Resistance: The dapE-encoded N-succinyl-L,L-Diaminopimelic Acid Desuccinylase from Haemophilus influenzae is a Dinuclear Metallohydrolase
Mercury Speciation in Piscivorous Fish from Mining-impacted Reservoirs
X-ray Absorption Spectroscopy Catches the Chemical Form of Mercury in Fish
Localizing Organomercury Uptake and Accumulation in Zebrafish Larvae at the Tissue and Cellular Level
Br-rich Tips of Calcified Crab Claws are Less Hard but More Fracture Resistant: A Comparison of Mineralized and Heavy-element Biological Materials
Research Sheds Light on Workings of Anti-cancer Drug
Electronic Structure of O2-Bound Metal Sites in Biomimetic Model Complexes
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