Radiation Detection Device Magnetic Shielding for Photoelectron Control
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Solution Overview
Problem
In X-ray fluorescence analysis, photoelectrons and illumination light entering the radiation detection element cause sensitivity deterioration and malfunctions in the radiation detection device.
Innovation Solution
A radiation detection device with a magnetic field production unit and a block that shields the radiation detection element, using a magnetic field to bend the path of photoelectrons and block illumination light, and coated magnets to absorb X-rays, while maintaining a clear path for fluorescent X-rays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a magnetic field production unit is added to bend photoelectron paths, then photoelectron suppression is improved, but device complexity increases
Solution Approach 1:
A magnetic field production unit is introduced as an intermediary component between the sample and radiation detection element. This unit generates a magnetic field that acts on photoelectrons to bend their trajectories, preventing them from reaching the detection element while allowing X-rays to pass through unaffected.
Solution Approach 2:
The device is segmented into distinct functional zones: an illumination unit for light source, a magnetic field production unit for photoelectron control, and a radiation detection element for X-ray detection. This segmentation allows each component to perform its specific function independently, improving overall system effectiveness.
2Object-affected harmful factors
If a block is added to shield illumination light, then light suppression is improved, but device complexity increases
Solution Approach 1:
A block is introduced to extract or remove the harmful effect of illumination light from the system. The block is positioned to physically block the path of illumination light from reaching the radiation detection element, thereby extracting the light interference problem from the detection path.
3Measurement precision
If magnets are coated with low atomic number substance, then system peak reduction is improved, but manufacturing complexity increases
Solution Approach 1:
The magnets are constructed as composite structures with a magnetic core material coated with a substance of lower atomic number. This composite structure allows the inner magnetic material to provide the necessary magnetic field while the outer coating material reduces X-ray fluorescence and system peaks by absorbing low-energy X-rays generated in the magnet.
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
Prevents photoelectron and illumination light entry, maintaining sensitivity and preventing malfunctions, allowing efficient detection of low-energy fluorescent X-rays.
Implementation Method 1
a magnetic field production unit that produces a magnetic field in part of a space from the sample to the radiation detection element
Implementation Method 2
The travel direction of photoelectrons generated from the sample is bent by the magnetic field
Implementation Method 3
a block that holds the magnetic field production unit. The block is located so as to shield light from the illumination unit to the radiation detection element
Implementation Method 4
the magnetic field production unit and the block are subjected to anti-reflective treatment
Implementation Method 5
X-rays generated from the magnet due to the entrance of X-rays or the collision of photoelectrons are absorbed in the substance coating the magnet
Implementation Method 6
a radiation detection element detecting X-rays generated from the sample
Data Source
AI summary
A radiation detection device including an illumination unit illuminating a sample, an irradiation unit irradiating the sample with X-rays and a radiation detection element detecting X-rays generated from the sample is provided with a magnetic field production unit that produces a magnetic field in part of a space from the sample to the radiation detection element and a block that holds the magnetic field production unit. The block is located at a position where light from the illumination unit to the radiation detection element is shielded.