X-ray Scattering Detector Distance Adjustment via Sample Inversion
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Solution Overview
Problem
Current X-ray scattering measurement systems face limitations in simultaneously measuring small-angle and large-angle scattering regions due to restrictive beam conditioning, detector resolution, and the need for complex detector adjustments, which hinder rapid and accurate characterization of samples.
Innovation Solution
The method involves moving the sample along the X-ray beam while maintaining the detector's position, allowing for simple changes in the sample-to-detector distance to alternate between small-angle and large-angle scattering regions, preserving vacuum conditions and enabling rapid sequential measurements without recalibrating the detector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the detector is moved to change sample-to-detector distance for measuring different scattering regions, then measurement flexibility is improved, but device complexity and measurement time increase due to recalibration requirements
Solution Approach 1:
Instead of moving the detector to change measurement conditions, the invention moves the sample along the X-ray beam path. This inversion of the movable element resolves the contradiction because the sample can be rapidly repositioned without affecting detector calibration, enabling quick switching between small-angle and large-angle scattering measurements while maintaining measurement flexibility and avoiding detector recalibration complexity
2Adaptability or versatility
If the sample-to-detector distance is changed to measure both small-angle and large-angle regions, then measurement range is improved, but measurement precision deteriorates due to detector recalibration errors
Solution Approach 1:
The invention inverts the approach by moving the sample rather than the detector. This allows the sample to be repositioned for different scattering angle measurements while the detector remains stationary and calibrated, thereby expanding the angular measurement range without compromising the precision of scattering intensity measurements
3Adaptability or versatility
If complex detector adjustments are made to cover both scattering regions, then measurement comprehensiveness is improved, but productivity decreases due to time-consuming recalibration
Solution Approach 1:
By inverting the system and moving the sample instead of the detector, the invention enables rapid switching between small-angle and large-angle scattering measurements. The stationary detector remains calibrated throughout, eliminating time-consuming recalibration steps and significantly improving measurement productivity while maintaining comprehensive scattering region coverage
4Measurement precision
If beam conditioning is made restrictive to improve resolution, then measurement precision is improved, but device complexity increases due to additional optical elements
Solution Approach 1:
The invention applies local quality by using a zone plate with spatially varying focal lengths - different zones have different optical properties to condition the beam locally. This allows precise control of beam parameters at specific locations without requiring complex global optical systems, thereby improving scattering pattern resolution while minimizing overall device complexity
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
This approach allows for consistent and efficient recording of overlapping scattering images across a wide angular range, enhancing measurement accuracy and speed by minimizing detector movement and adjustments, thus facilitating simultaneous evaluation of both scattering regions.
Implementation Method 1
The elastic scattering of X-ray radiation is used for non-destructive characterisation of the structure of various sample materials. X-ray scattering occurs when a beam of X-ray radiation impinges on an inhomogeneous, pulverulent, liquid, and/or solid material having a structure in the order of magnitude of the wavelength of the X-ray radiation employed.
Implementation Method 2
The X-rays penetrate into the sample, and the material being studied interacts with the X-ray beam, resulting in scattering. This results in characteristic interference images.
Implementation Method 3
The zone plate has a succession of transparent and opaque zones which radially alternate about an opaque centre. The transparent zones have a different refractive index than the opaque zones, causing the X-ray beam to be focused.
Data Source
AI summary
The invention relates to a method and an apparatus for studying the X-ray properties of samples (3c), wherein X-ray radiation scattered by a sample (3c) is recorded by a detector (5) positioned at a distance from the sample (3c) and is evaluated with respect to the characteristics of the sample. According to the invention, it is provided that at a predetermined distance between the X-ray beam source (1) and the detector (5) or between the starting point (2b) of the X-ray beam (10) directed at the sample (3c) and the detector (5), for a predetermined number of successive measurements the distance (S1, S2) between the sample (3c) and the detector (5) is changed and is set at a predetermined different value.