Alpha Diffractometer With Beam-Stopper-Free Pixel Detection
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Solution Overview
Problem
Existing X-ray diffractometers face challenges with high manufacturing complexity, low resolution, and sensitivity to external mechanical influences, particularly due to the need for beam stoppers and limited spatial resolution.
Innovation Solution
An X-ray diffractometer design that eliminates the use of beam stoppers and enhances spatial resolution through a movable two-dimensional pixel detector array capable of transverse oscillations and controlled positioning, combined with a computer workstation for 3-D diffractometric analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If beam stoppers are used in conventional diffractometers, then the transmitted X-ray beam is blocked, but the device complexity and manufacturing precision requirements increase
Solution Approach 1:
The patent removes the beam stopper component entirely from the diffractometer system. Instead of blocking the transmitted beam with a physical stopper, the system uses a two-dimensional pixel detector array that can electronically distinguish between transmitted and diffracted radiation, eliminating the need for mechanical beam blocking components and reducing overall device complexity
Solution Approach 2:
The patent replaces the mechanical beam stopper system with an electronic/digital detection system. The two-dimensional pixel detector array uses electronic signal processing to differentiate between transmitted and diffracted radiation based on spatial distribution and intensity patterns, substituting mechanical beam blocking with electronic discrimination
2Measurement precision
If conventional detectors are used, then the spatial resolution is limited, but the detector size and pixel density requirements increase
Solution Approach 1:
The patent transitions from one-dimensional linear detector arrays to two-dimensional pixel detector arrays. This dimensional change allows simultaneous measurement of diffraction patterns across multiple angles and positions, achieving high spatial resolution without requiring excessively long detector arrays or extremely fine pixel pitch, thereby reducing overall detector complexity while improving measurement precision
Solution Approach 2:
The two-dimensional pixel detector array serves multiple functions simultaneously: it detects diffracted radiation, measures transmitted beam intensity distribution, determines sample position, and characterizes beam geometry. This multi-functionality eliminates the need for separate detectors or measurement systems, reducing overall device complexity while achieving high spatial resolution
3Device complexity
If the detector is made stationary, then the mechanical structure is simpler, but the ability to perform 3-D structural analysis is limited
Solution Approach 1:
The patent implements a movable detector assembly that can translate along the X-ray beam direction and oscillate transverse to the beam. This dynamic positioning capability allows the stationary-appearing detector to access multiple spatial positions and angles, enabling comprehensive 3-D structural analysis without requiring complex multi-axis mechanical goniometers, thus maintaining relative mechanical simplicity while achieving high adaptability
Data Source
AI summary
A diffractometer system includes an X-ray beam projector that projects an X-ray micro-beam at an analysis target, an X-ray receiver including an X-ray detector array to detect the transmitted X-ray beam passed through the object and X-rays that the target diffracts, and a computer workstation for system control and data analysis. The X-ray beam projector may include a radiation source, a beam forming system including at least one of a monochromator, a collimator, and focusing device. The computer workstation may control the X-ray devices and positioning mechanisms and motors, may acquire, process, store, or display data received from diffractometric examination, and may also calculate parameters of the three-dimensional reciprocal lattice of the analyzed target.