Multibeam X-Ray Source Gate Segmentation Feedback Control
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Solution Overview
Problem
Multibeam x-ray sources face challenges in maintaining consistent and predictable output due to independent source element control and potential electron generation element degradation, limiting their effectiveness in medical and industrial applications.
Innovation Solution
A multibeam field emission x-ray system with a plurality of cathode elements, an anode assembly, and an extraction gate, where an electronic control system adjusts the potential difference between the extraction gate and cathode elements based on measured emission characteristics to maintain consistent electron emission and compensate for degradation, reducing the number of electrical connections through gate segmentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple independent cathode elements are used in a multibeam x-ray source, then image acquisition speed and viewing angle coverage are improved, but control complexity and output consistency deteriorate
Solution Approach 1:
The extraction gate is divided into multiple independently controllable segments, each corresponding to a specific cathode element or group of elements. This segmentation allows individual control of electron emission from each cathode element while maintaining a manageable control architecture, resolving the contradiction between achieving fast multi-angle imaging and controlling complexity.
2Productivity
If multiple independent cathode elements are used, then faster image acquisition is achieved, but output consistency and predictability worsen due to degradation
Solution Approach 1:
The system incorporates feedback mechanisms that continuously monitor the emission characteristics of each cathode element and adjust the extraction gate segment potentials accordingly. This feedback control compensates for degradation in electron generation elements, maintaining consistent and predictable x-ray output from multiple cathode elements over time.
Solution Approach 2:
The extraction gate potentials are made dynamically adjustable for each segment, allowing real-time optimization of electron extraction efficiency as cathode elements degrade. This dynamic control ensures that each cathode element operates at its optimal performance level, maintaining overall system reliability and output consistency.
3Measurement precision
If individual control of each cathode element is implemented, then emission characteristics can be optimized, but the number of electrical connections and system complexity increase
Solution Approach 1:
The extraction gate is segmented into controllable sections that can be independently biased to control electron emission from corresponding cathode elements. This segmentation provides precise control over emission characteristics while reducing the total number of electrical connections compared to fully individual control, as adjacent segments can share control circuitry and power supplies.
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 system achieves consistent and predictable x-ray output, enabling faster image acquisition and reducing the complexity of electrical connections, thus enhancing the performance and reliability of multibeam x-ray sources in imaging applications.
Implementation Method 1
a field emission x-ray source can comprise a plurality of cathode elements, an extraction gate, and an anode
Implementation Method 2
electrons incident thereon to produce x-rays
Data Source
AI summary
Multibeam field emission x-ray systems and related methods can include cathode elements, an anode assembly spaced from the plurality of cathode elements, and an extraction gate positioned between the plurality of cathode elements and the anode assembly. A potential difference can be applied between the extraction gate and at least one of the cathode elements to cause an emission of electrons from the respective cathode elements. Emission characteristics of the cathode elements can be measured, and the potential difference between the extraction gate and at least one of the cathode elements can be adjusted based on the emission characteristics measured.