X-ray Spectrometer Movable Slit Stationary Monochromator
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Solution Overview
Problem
Existing X-ray multi-channel spectrometers for elemental and structural analysis of polycrystalline samples are complex, costly, and require extensive mechanical movements and multiple collimator arrangements, leading to high production costs and reduced beam intensity.
Innovation Solution
A simplified X-ray spectrometer design featuring a stationary monochromator with a single entrance slit and a movable single-slit device between the source and sample, eliminating the need for complex collimator arrangements and mechanical movements, allowing for a higher 2θ diffraction angle and increased radiation intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If parallel beam optics with multiple collimator arrangements are used for diffractometry, then diffraction analysis can be performed, but the device complexity increases and beam intensity is strongly reduced
Solution Approach 1:
The patent extracts the essential function of beam definition from the complex collimator arrangements and implements it through a simple movable single-slit device. This slit device can be positioned at different locations to define the beam geometry required for diffractometry, eliminating the need for multiple collimator arrangements while maintaining the necessary beam control for diffraction analysis
Solution Approach 2:
The movable single-slit device serves multiple functions: it acts as a beam-defining aperture for diffractometry, can be removed or positioned away for fluorescence measurements, and helps define the diffraction geometry by working with the stationary monochromator entrance slit. This single component replaces multiple specialized collimator arrangements
2Adaptability or versatility
If multiple collimator arrangements are used for diffractometry, then diffraction analysis is enabled, but production costs increase
Solution Approach 1:
The patent extracts the essential beam-defining function from expensive multiple collimator arrangements and implements it through a single, simple movable slit device. This dramatically reduces the number of precision-machined components required, thereby reducing production costs while maintaining diffractometry capability
Solution Approach 2:
The movable single-slit device is a simple, inexpensive component compared to multiple collimator arrangements. It can be easily manufactured and replaced if needed, providing a cost-effective solution that maintains the necessary optical geometry for diffractometry without the high production costs of complex collimator systems
3Adaptability or versatility
If a first collimator arrangement is placed between source and sample for diffractometry, then diffraction measurements can be performed, but the distance between source and sample must be large and beam intensity is reduced
Solution Approach 1:
The movable single-slit device acts as an intermediary element that can be positioned close to the source or sample without requiring large source-to-sample distances. It defines the beam geometry needed for diffractometry while allowing the use of shorter distances, thereby maintaining higher beam intensity at the sample position
4Adaptability or versatility
If the monochromator is moved in arc-shaped movement for diffraction scan, then diffraction angles can be varied, but the mechanical system becomes complex and space-intensive
Solution Approach 1:
The patent segments the functions of varying diffraction angle and wavelength selection. The movable single-slit device handles the angle variation by changing its position relative to the stationary monochromator and sample, while the monochromator remains fixed for wavelength selection. This segmentation eliminates the need for complex arc-shaped monochromator movement mechanisms
5Adaptability or versatility
If the monochromator is moved in arc-shaped movement for diffraction scan, then diffraction measurements at different angles are possible, but maintenance costs and production costs increase
Solution Approach 1:
By segmenting the angle variation function from the monochromator and assigning it to the movable single-slit device, the patent creates a system where the monochromator remains stationary and simple. This eliminates complex mechanical drive mechanisms that would require maintenance, reducing both maintenance costs and production costs while maintaining the ability to perform diffraction measurements at different angles
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
The design reduces structural complexity, production costs, and mechanical requirements, enabling reliable elemental analysis and diffraction measurements with improved radiation intensity and a wider diffraction angle, particularly beneficial for analyzing free lime (CaO) applications.
Implementation Method 1
uses a monochromator to select an X-ray wavelength of the source following diffraction of the X-rays by the sample
Implementation Method 2
the position of the irradiated measurement spot together with the position of monochromator and detector defines the characteristic diffraction angle 2θ
Implementation Method 3
diffraction of the X-rays by the sample
Implementation Method 4
defines the characteristic diffraction angle 2θ of a given crystal structure of the polycrystalline sample
Implementation Method 5
with which the emitted X-ray fluorescence radiation characteristic of a certain material can be measured
Data Source
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AI summary
An X-ray multi-channel spectrometer comprising a polychromatic source (2), a holding device (3) for holding a sample (1), a fluorescence channel (4) which selects X-rays of a specific wavelength and energy and has a detector (5) for measuring the selected X-rays, a diffractometry channel (6) which selects an X-ray wavelength of the source by means of a monochromator (7) following the diffraction of the X-ray emitters by the sample, and a detector (8) for measuring the selected X-rays, is characterized in that a single-slit device (9) movable transversely to the direction of the beam leaving the source is provided between the source and the sample, and that the monochromator of the diffractometry channel is arranged in a fixed position with respect to the source and the sample and has a single entrance slit (10).The movable single-slit assembly and the sample position define the characteristic diffraction angle 26 of a predefined crystal structure of the polycrystalline sample at the wavelength of the source selected by the monochromator. This allows for reliable elemental analysis and cost-effective X-ray diffraction to be performed in the same instrument, eliminating the need for the previously required minimum of three collimator arrangements for the diffractometry channel and removing the need for complex movement mechanics of the monochromator within the diffractometry channel for diffraction scanning.