SAXS Capillary Interface

Overview

This guide covers the integration of the Autonomous Formulation Lab (AFL) with a Small-Angle X-ray Scattering (SAXS) capillary setup, enabling automated sample delivery for X-ray scattering experiments.

Components Required

• Quartz or borosilicate capillaries
• Capillary holders and mounts
• X-ray compatible tubing and connectors
• Mounting hardware for X-ray beam line
• Optional: temperature control components

Hardware Setup

1. Capillary Selection

• Material options (quartz vs. borosilicate)
• Diameter considerations
• Wall thickness optimization
• Length requirements

2. Beam Line Integration

• Mounting on standard SAXS sample stages
• Alignment procedures
• Compatibility with standard beam line equipment

3. Fluidic Connections

• Tubing selection for X-ray compatibility
• Connection to AFL pneumatic system
• Specialized fittings for capillaries
• Waste handling and containment

4. Temperature Control (Optional)

• Heat exchanger options
• Temperature monitoring
• Control integration

Software Integration

1. Communication with Beam Line Systems

• Triggering options
• Status monitoring
• Coordination with X-ray source

2. Automation Protocols

• Sample delivery sequences
• Washing/cleaning procedures
• Measurement timing coordination
• Sample environment control

3. Data Management

• File naming conventions
• Metadata recording
• Integration with X-ray facility data systems

Validation and Testing

1. Flow Characteristics

• Flow rate calibration
• Capillary filling verification
• Air bubble prevention

2. Sample Volume Optimization

• Minimum sample volume determination
• Dead volume considerations
• Sample efficiency strategies

3. Measurement Validation

• Standard samples testing
• Background and transmission measurements
• Reproducibility assessment

X-ray Facility Considerations

1. Safety Requirements

• Radiation safety protocols
• Chemical safety considerations
• Containment requirements

2. Facility-Specific Adaptations

• Synchrotron facility specifics
• Laboratory source considerations
• International facility guidelines

Troubleshooting

1. Common Issues

• Capillary breakage
• Air bubbles in sample
• Sample sedimentation
• Beam alignment problems

2. Maintenance

• Capillary cleaning or replacement
• Connection inspection
• Pressure testing protocols