X-ray Detection Shielding for Fluorescence Analysis
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Solution Overview
Problem
The challenge is to create a downsized X-ray detection apparatus that effectively blocks non-fluorescent X-rays, such as scattered and direct X-rays from the irradiation unit, to enhance the accuracy of X-ray fluorescence analysis, especially when the X-ray irradiation unit, detector, and collimator are positioned closely together.
Innovation Solution
The apparatus incorporates a shield with a first and second shielding member to block X-rays between the X-ray irradiation unit and detector, and between the collimator and detector, respectively, while maintaining the ability to detect fluorescent X-rays from the sample. The shield is integrated with the collimator and can move to adjust apertures, ensuring that only fluorescent X-rays are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the X-ray irradiation unit, detector, and collimator are positioned closely together to downsize the apparatus, then the device size is reduced, but non-fluorescent X-rays (scattered and direct X-rays) more easily enter the detector
Solution Approach 1:
A shield is introduced as an intermediary component between the X-ray irradiation unit and the detector. The shield blocks scattered X-rays and direct X-rays from reaching the detector while allowing fluorescent X-rays from the sample to pass through to the detector, thus solving the problem of non-fluorescent X-ray contamination in a compact apparatus configuration
Solution Approach 2:
The shield is divided into multiple shielding members (first shielding member and second shielding member) that can be independently positioned and adjusted. This segmentation allows precise control over which X-ray paths are blocked and which are permitted, enabling effective differentiation between harmful non-fluorescent X-rays and useful fluorescent X-rays
2Measurement precision
If a shield is added to block non-fluorescent X-rays, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The shield is integrated with the collimator assembly, merging two functional components into a unified structure. This integration allows the shield to be positioned and adjusted together with the collimator, reducing the overall number of separate components and simplifying the apparatus structure while maintaining effective blocking of non-fluorescent X-rays
Solution Approach 2:
The shielding members are designed to be movable rather than fixed, allowing dynamic adjustment of their positions. This enables the shield to adapt to different sample types and analysis requirements, providing flexibility in controlling X-ray paths while maintaining a relatively simple overall structure that can be reconfigured as needed
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 prevents non-fluorescent X-rays from entering the detector, maintaining high analysis accuracy even in a compact setup, allowing for the downsizing of the X-ray detection apparatus for more precise X-ray fluorescence analysis.
Implementation Method 1
a shield, which blocks X-rays passing through a path linking the exit with the entrance and X-rays passing through a path linking an arbitrary part of the collimator with the entrance
Implementation Method 2
a collimator configured to narrow X-rays to be used for irradiation of the sample by the X-ray irradiation unit
Implementation Method 3
detecting fluorescent X-rays generated from the sample
Data Source
AI summary
The X-ray detection apparatus is equipped with an X-ray irradiation unit, an X-ray detector, a movable collimator and a shield for blocking X-rays. The shield blocks X-rays, which are to enter the X-ray detector directly from the X-ray irradiation unit. The shield also blocks fluorescent X-rays and scattered X-rays generated by irradiation of the collimator with X-rays. In such a manner, it is possible to prevent X-rays other than fluorescent X-rays from the sample S from being detected by the X-ray detector. The shield is joined with the collimator, so that the collimator and the shield move as a unit. It is possible to locate the shield even in a downsized X-ray detection apparatus.