Thin Film X-Ray Analysis Side Wall Backscatter Control
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Solution Overview
Problem
Existing thin film X-ray analysis apparatuses face challenges in minimizing the reflection of X-rays that pass through the thin film, which can distort detection results.
Innovation Solution
The apparatus includes first and second side walls positioned on opposite sides of the film plane to contain X-rays that pass through the thin film, preventing them from being reflected back to the detector. An optional grating can be used to scatter X-rays further, ensuring no coherent beam is reflected back.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a thin film X-ray analysis apparatus is used to inspect materials, then material composition and structural information can be obtained, but X-rays that pass through the thin film may be reflected back and detected, distorting the detection results
Solution Approach 1:
The patent extracts and removes the harmful backscatter component by introducing side walls that physically block reflected X-rays from reaching the detector. The side walls are positioned to intercept X-rays that pass through the thin film and would otherwise be reflected back to the detector, effectively separating the useful transmitted X-rays from the harmful reflected ones.
Solution Approach 2:
The side walls act as an intermediary element between the thin film and the detector. They are strategically positioned to intercept and block the harmful reflected X-rays while allowing the useful transmitted X-rays to reach the detector, thus mediating the interaction between the X-ray beam and the detection system to eliminate distortion.
2Measurement precision
If side walls are added to prevent X-ray reflection, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent divides the detection space into distinct regions using side walls, creating separate zones for useful X-ray transmission and harmful X-ray reflection. This segmentation allows the apparatus to selectively block only the harmful backscatter paths while maintaining the useful detection paths, achieving improved accuracy with minimal structural addition.
Solution Approach 2:
The patent addresses the backscatter problem by adding structural elements in a different spatial dimension - introducing side walls that extend laterally from the film plane. This dimensional approach blocks reflected X-rays without interfering with the primary X-ray beam path, solving the problem with elegant spatial arrangement rather than complex mechanical systems.
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 configuration ensures that the signal received at the detector is uncontaminated, resulting in more accurate X-ray analysis by preventing backscatter and maintaining the integrity of the detected X-rays.
Implementation Method 1
due to the nature of the thin film, some of the X-rays will pass through the thin film
Implementation Method 2
In X-ray diffraction, the material scatters the X-rays and results in a diffraction pattern
Implementation Method 3
prevent them from being reflected back to the detector
Data Source
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AI summary
The present invention relates to an X-ray analysis apparatus for analysing a sample. The X-ray analysis apparatus includes a first roller and a second roller. The first roller and the second roller form a film plane along which a thin film passes. The apparatus comprises an X-ray source for irradiating a sample with X-rays and a detector configured to detect X-rays. The X-ray source is configured, in operation, to project X-rays to a work area between the first and second rollers and being positioned, in operation on a first side of the film plane. The apparatus further comprises a first side wall and a second side wall. The first side wall is positioned on a second, opposite, side of the film plane, to the X-ray source and is arranged between the work area and the first roller. The second side wall is also positioned on a second, opposite, side of the film plane to the X-ray source and is arranged between the work area and the second roller.