Movable Proximal X-ray Detector for SAXS WAXS Angular Coverage
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Solution Overview
Problem
Conventional X-ray scattering apparatuses are limited in their ability to simultaneously cover a larger angular range for both Small Angle X-ray Scattering (SAXS) and Wide Angle X-ray Scattering (WAXS) measurements, particularly for anisotropic samples requiring extensive azimuthal coverage.
Innovation Solution
The proximal X-ray detector is made movable along the X-ray beam propagation direction, allowing it to adjust its position between a minimum and maximum distance from the sample, enabling it to serve as a secondary SAXS detector and optimize angular coverage, while the distal detector remains movable for SAXS measurements, forming a joint detection surface for enhanced coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the proximal X-ray detector is made movable along the beam propagation direction, then the angular coverage range is improved, but the device complexity increases
Solution Approach 1:
The proximal detector is made movable along the beam propagation direction through a motorized positioning system, allowing dynamic adjustment of the detector-sample distance. This enables the system to adapt between SAXS and WAXS measurement modes and optimize angular coverage for different samples and experimental conditions.
Solution Approach 2:
The movable proximal detector configuration allows a single detector to serve multiple functions: detecting both SAXS and WAXS signals depending on its position, and providing enhanced azimuthal coverage for anisotropic samples. This multi-functionality resolves the contradiction by making the system adaptable to various measurement requirements.
2Adaptability or versatility
If the proximal and distal detectors form a joint detection surface, then the azimuthal coverage is improved, but the measurement precision requirements increase
Solution Approach 1:
The proximal and distal detectors are positioned and oriented to form a joint detection surface that collectively covers a wide azimuthal angular range. The merging of detection areas from both detectors enables comprehensive coverage of scattered radiation from anisotropic samples, addressing the need for extended azimuthal coverage.
Solution Approach 2:
The patent employs motorized positioning and alignment systems with precision feedback control to manage the complex angular alignment requirements. This substitution of manual mechanical alignment with automated precision control systems enables the joint detection surface configuration while maintaining measurement precision.
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 allows for increased azimuthal angular coverage and optimized measurement of sample structure and material phases, enabling the detection of scattered radiation over a continuous range of angles from SAXS to WAXS, improving data collection for anisotropic samples.
Implementation Method 1
detect X rays scattered from the sample
Implementation Method 2
an X-ray source, for example a Cu or Mo source for generating X-rays
Data Source
AI summary
An X-ray scattering apparatus has a sample holder for aligning and orienting a sample to be analyzed by X-ray scattering, an X-ray beam delivery system arranged upstream of the sample holder for generating and directing a direct X-ray beam along a propagation direction towards the sample holder, a proximal X-ray detector arranged downstream of the sample holder as to let the direct X-ray beam pass and detect X rays scattered from the sample, and a distal X-ray detector arranged downstream of the sample holder and movable along the propagation direction (X) of the direct X-ray beam in which the proximal X-ray detector is also movable essentially along the propagation direction of the direct X-ray beam.