A new stand-alone QEXAFS data acquisition system for in situ studies

Area of Science:

• Materials Science
• Spectroscopy
• Instrumentation

Background:

• The quick-scanning extended X-ray absorption fine structure (QEXAFS) technique requires advanced data acquisition systems for efficient experimental operation.
• Existing systems may lack the speed, flexibility, and user-friendliness necessary for complex in situ studies.

Purpose of the Study:

• To design and develop a novel stand-alone data acquisition system for QEXAFS.
• To enhance experimental control, data visualization, and flexibility for QEXAFS measurements.

Main Methods:

• Development of a new stand-alone system utilizing a multi-functional USB board and custom software.
• Implementation of high-speed data scanning (up to 500,000 samples/sec) with real-time visualization.
• Integration of synchronized control for QEXAFS monochromator, current amplifiers, and a three-axis stepper motor for sample positioning.

Main Results:

• The system enables continuous, dead-time-free data acquisition for extended periods, stored in binary or ASCII format.
• Instantaneous data visualization allows for immediate feedback and optimization of experimental parameters.
• Synchronized control of experimental components facilitates programmed scans and immediate response to in situ sample changes.
• Spatially resolved scans and sample alignment tools are achievable through integrated stepper motor control.

Conclusions:

• The new QEXAFS data acquisition system significantly improves experimental efficiency, interactivity, and flexibility.
• The system supports advanced applications, including in situ studies and spatially resolved measurements.
• The design provides a versatile platform for optimizing beamline and detector settings and performing complex experimental protocols.