Anton Paar SAXSpace Small-Angle and Wide-Angle X-ray Scattering System

Overview

The Anton Paar SAXSpace is a modular, high-precision small-angle and wide-angle X-ray scattering (SAXS/WAXS) system engineered for nanoscale structural characterization across diverse material classes. Based on the fundamental principles of elastic X-ray scattering from electron density fluctuations, the SAXSpace measures intensity as a function of scattering vector q (q = 4πsinθ/λ), enabling quantitative analysis of structural features from ~0.13 nm to 200 nm in real space. Its dual-angle capability—simultaneous acquisition over a continuous q-range spanning 0.03–49 nm⁻¹ (corresponding to 2θ up to 74°)—eliminates sequential reconfiguration between SAXS and WAXS modes, ensuring intrinsic data co-registration, time-resolved fidelity, and minimized beamtime overhead. Designed and manufactured in Graz, Austria, the system integrates a high-stability sealed X-ray tube (40 kV / 50 mA), motorized optics, and thermally controlled sample environments to support both static and dynamic structural studies under rigorously controlled conditions.

Key Features

• True simultaneous SAXS and WAXS acquisition without hardware reconfiguration or detector movement
• Motorized, software-controlled optical alignment for reproducible beam positioning and automatic collimation optimization
• In situ temperature control from −150 °C to +300 °C with ±0.1 °C stability, compatible with cryostats, furnace stages, and Peltier modules
• Minimal sample consumption: as low as 7 µL for liquids and few milligrams for solids—critical for precious biological or synthetic samples
• Flexible source configuration: interchangeable line-focus (20 × 0.3 mm²) and point-focus (0.3 × 0.3 mm²) beams for optimized resolution vs. flux trade-offs
• Modular design supporting GI-SAXS (grazing-incidence), Bio-SAXS (flow cells, automated sample changers), and time-resolved kinetics

Sample Compatibility & Compliance

The SAXSpace accommodates a broad spectrum of sample formats—including powders, thin films, gels, colloidal dispersions, protein solutions, polymer melts, and catalytic substrates—without requiring specialized mounting beyond standard capillaries, quartz plates, or transmission cells. Its vacuum- or He-purged measurement chamber minimizes air scatter, enhancing signal-to-noise for low-Z materials and dilute systems. The platform supports compliance with international standards governing structural analysis: measurements adhere to ISO 12880 (X-ray scattering for nanoparticle size distribution), ASTM E2858 (SAXS for polymer crystallinity), and ICH Q5E (structural comparability of biopharmaceuticals). When operated with audit-trail-enabled software and electronic signatures, the system meets GLP and GMP documentation requirements per FDA 21 CFR Part 11 for regulated quality control laboratories.

Software & Data Management

Data acquisition, reduction, and modeling are performed using Anton Paar’s dedicated SAXS software suite—fully integrated with the instrument control layer. The software provides real-time background subtraction, primary beam normalization, absolute intensity calibration (via silver behenate or water), and anisotropic scattering correction. Advanced modules include Guinier analysis, Porod modeling, particle shape fitting (cylinders, ellipsoids, core-shell), and ab initio reconstruction (e.g., DAMMIF/DAMMIN integration). All processing steps are scriptable, versioned, and logged with full metadata capture—including instrument parameters, environmental conditions, and user annotations—to ensure traceability and method reproducibility. Raw and processed datasets export to standard formats (ASCII, HDF5, NXcanSAS) for third-party validation or integration into LIMS and ELN platforms.

Applications

• Soft Matter & Polymers: Micelle morphology, block copolymer phase behavior, vesicle bilayer thickness, and nanostructure evolution during solvent annealing
• Structural Biology: Oligomeric state determination, conformational changes, domain organization, and aggregation kinetics of proteins and nucleic acids in solution
• Nanomaterials & Catalysts: Crystallite size distribution, specific surface area (BET-equivalent), pore structure, and lattice strain in metal oxides and supported nanoparticles
• Colloids & Dispersions: Stability assessment via time-resolved scattering, nucleation onset detection, and floc size evolution under shear or thermal stress
• Fibers & Liquid Crystals: Crystallinity index, lamellar spacing, chain orientation distribution, and mesophase symmetry identification
• Emulsions & Complex Fluids: Droplet internal structure (e.g., multilamellar vs. micellar), interfacial curvature, and temperature-dependent phase transitions

FAQ

Can the SAXSpace perform grazing-incidence SAXS (GI-SAXS) on thin films?
Yes—the system supports motorized incident angle control down to 0.05°, enabling quantitative analysis of lateral and vertical nanostructure in spin-coated, Langmuir–Blodgett, or vapor-deposited films.
Is radiation damage mitigation available for sensitive biological samples?
The SAXSpace offers programmable exposure sequencing, attenuated beam modes, and rapid-readout detectors to minimize dose accumulation; optional inline filtration and flow cells further reduce local dose burden.
Does the system comply with regulatory data integrity requirements?
When configured with enabled audit trails, electronic signatures, and role-based access control, the software meets FDA 21 CFR Part 11 and EU Annex 11 criteria for analytical instrumentation in pharmaceutical development and QC.
What sample environments are supported beyond standard temperature control?
Optional add-ons include humidity chambers, electrochemical cells, tensile stages, and magnetic field inserts—enabling correlative structural response under multi-stimuli conditions.
How is absolute intensity calibration performed?
Calibration uses certified reference materials (e.g., silver behenate, polystyrene latex standards) traceable to NIST or BAM, with secondary validation against water scattering cross-sections at defined temperatures and concentrations.