Bonse Hart Analyzer Storage for Continuous X-Ray Scattering
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Solution Overview
Problem
Existing X-ray scattering instruments face limitations in performing continuous measurements from USAXS to WAXS regimes due to the Bonse Hart analyzer module's inability to position the X-ray detector close to the sample, requiring manual removal for WAXS experiments, which affects throughput and flexibility.
Innovation Solution
An X-ray scattering apparatus with a storage chamber for the Bonse Hart analyzer module and separate motor drives for independent module movement, allowing continuous positioning of the X-ray detector and modules for USAXS, SAXS, and WAXS measurements without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the Bonse Hart analyzer module is positioned in the X-ray beam for USAXS measurements, then ultra-small angle scattering measurement capability is improved, but the X-ray detector cannot be positioned close to the sample for WAXS measurements
Solution Approach 1:
The Bonse Hart analyzer module is made dynamically movable between an active position in the X-ray beam for USAXS measurements and an inactive position removed from the beam path for WAXS measurements. This dynamic reconfiguration allows the system to adapt between different measurement modes, resolving the contradiction between USAXS capability and WAXS versatility.
Solution Approach 2:
The measurement capabilities are segmented into distinct operational modes controlled by the position of the Bonse Hart analyzer module. By separating the USAXS configuration (analyzer in beam) from the WAXS configuration (analyzer removed), the system can optimize for each measurement type independently, eliminating the mutual exclusion problem.
2Adaptability or versatility
If manual removal of the Bonse Hart analyzer module is required for WAXS experiments, then measurement flexibility is improved, but measurement throughput and automation are reduced
Solution Approach 1:
The manual mechanical removal operation is replaced with an automated motorized positioning system. The motorized stage automatically moves the Bonse Hart analyzer module between active and inactive positions based on the selected measurement mode, eliminating manual intervention while maintaining measurement flexibility and increasing throughput through automation.
Solution Approach 2:
The system performs self-service by automatically reconfiguring the Bonse Hart analyzer module position according to the measurement type selected by the user. The motorized positioning system autonomously handles the module relocation without requiring manual operation, thereby maintaining flexibility while improving productivity through automated operation.
3Measurement precision
If the X-ray detector is positioned at large distances from the sample holder, then SAXS measurement capability is improved, but WAXS measurement capability requiring close positioning is reduced
Solution Approach 1:
The X-ray detector positioning is made dynamic, allowing movement between distal positions for SAXS measurements and proximal positions for WAXS measurements. The motorized detector stage enables the detector to adapt its position based on the measurement mode, resolving the contradiction between SAXS optimization and WAXS capability.
Solution Approach 2:
The X-ray detector is designed with multi-functionality through motorized positioning, enabling it to serve both SAXS measurements (at large distances) and WAXS measurements (at close distances). This universal positioning capability allows a single detector configuration to support multiple measurement types, eliminating the need for separate fixed-position detectors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables continuous, fully computerized control of experiments, improving measurement resolution and flexibility, especially for characterizing hierarchical materials with large aggregates and smaller particles, and enhancing data treatment for particle size distribution analysis.
Implementation Method 1
a Bonse Hart monochromator module positioned upstream of the sample holder and being equipped with a motorized monochromator holder; a Bonse Hart analyzer module positioned downstream of the sample holder and being equipped with a motorized analyzer holder
Implementation Method 2
by analyzing the intensity of the X-ray beam elastically scattered by the sample
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
The invention refers to an X-ray scattering apparatus (10), comprising: - a sample vacuum chamber (26); - a sample holder (20) placed inside the sample vacuum chamber (26) for aligning and/or orienting a sample (18) to be analyzed by X-ray scattering; - an X-ray beam delivery system (11) comprising a 2D X-ray source and a 2D monochromator and being arranged upstream of the sample holder (20) for generating and directing an X-ray beam along a beam path in a propagation direction (Y) towards the sample holder (20); - an X-ray detector (22), placed inside a diffraction chamber connected to the sample vacuum chamber (26), wherein the X-ray detector (22) is arranged downstream of the sample holder (20) and is movable, in particular in a motorized way, along the propagation direction such as to detect the X-ray beam and X-rays scattered at different scattering angles from the sample (18); - wherein the X-ray beam delivery system (11) is configured to focus the X-ray beam onto a focal spot on or near the X-ray detector (22) when placed at its distal position having the largest distance from the sample holder (20) or to produce a parallel beam, - a Bonse Hart monochromator module (12) positioned upstream of the sample holder (20) and being equipped with a motorized monochromator holder; - a Bonse Hart analyzer module (14) positioned downstream of the sample holder (20) and being equipped with a motorized analyzer holder (14a); wherein both the motorized monochromator holder and the motorized analyzer holder (14a) are configured such as to simultaneously position their respective modules (12, 14) in an active position in the X-ray beam for USAXS measurements and in an inactive position out of the X-ray beam for SAXS measurements, characterized in that the X-ray scattering apparatus (10) furthermore comprises a storage chamber (32) integral with or connected to the sample vacuum chamber (26) and/or the diffraction chamber, and that the motorized analyzer holder (14a) is furthermore configured to position the Bonse Hart analyzer module (14) in a storage position in the storage chamber (32). The invention furthermore refers to an X-ray scattering method carried out using the X-ray scattering apparatus.