X-ray Tube Anode Channel Design for Heat Distribution
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Solution Overview
Problem
X-ray tubes with transmissive anode structures face challenges in minimizing heat damage when high-energy electron beams are focused onto small areas, making it difficult to maintain high tube current and long-term X-ray emission.
Innovation Solution
The X-ray tube design incorporates a channel through the anode electrode, with varying shapes and sizes, allowing the electron beam to impact the inner sidewall of the channel rather than a single spot, reducing energy density and minimizing heat damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the anode electrode is minimized in thickness to reduce X-ray absorption, then the transmissive anode structure can efficiently emit X-rays, but the anode electrode becomes more susceptible to heat damage when high-energy electron beams impact it
Solution Approach 1:
The anode electrode is segmented into multiple channels, dividing the impact area into several regions. This segmentation allows the electron beam energy to be distributed across multiple channels rather than concentrated on a single spot, reducing heat damage while maintaining thin electrode structure for efficient X-ray transmission
Solution Approach 2:
The channel structure introduces a three-dimensional configuration to the anode electrode, transforming the flat two-dimensional impact surface into a structured three-dimensional channel system. This dimensional change increases the effective surface area for electron beam interaction, distributing heat load while maintaining thin overall thickness for X-ray transmission
2Measurement precision
If the electron beam is focused onto a small area to improve image quality and reduce focal spot size, then the X-ray image quality improves, but the heat density on the anode electrode increases causing damage
Solution Approach 1:
The channel structure segments the electron beam impact into multiple discrete channels, allowing the beam to be focused sufficiently for image quality while distributing the thermal load across multiple channel surfaces, preventing excessive heat density at any single location
Solution Approach 2:
Different regions of the anode electrode have different functions: the channel surfaces provide localized impact areas for heat distribution, while the overall structure maintains the focused beam geometry needed for image quality. Each local region is optimized for its specific function
3Productivity
If high tube current and high acceleration voltage are applied to improve X-ray emission, then the X-ray output increases, but the heat damage to the anode electrode increases making long-term emission difficult
Solution Approach 1:
The channel structure divides the high-power electron beam impact into multiple channels, allowing high tube current and acceleration voltage to be applied for improved X-ray emission while distributing the thermal stress across multiple surfaces, enabling long-term reliable operation
Solution Approach 2:
The channel structure provides dynamic heat dissipation pathways, allowing the anode electrode to handle varying power levels and maintain reliability under high tube current and acceleration voltage conditions through efficient thermal management across the channel surfaces
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 design effectively reduces heat damage to the anode electrode by distributing the electron beam's energy across a larger area, enabling higher tube current and longer X-ray emission without damaging the anode.
Implementation Method 1
an electron beam impacts on the anode electrode 11 to generate an X-ray
Data Source
AI summary
Provided is an X-ray tube. The X-ray tube includes an electrode on which an electron beam impacts to generate an X-ray, and a window on which the electrode is disposed and through which the X-ray generated from the electrode is transmitted. The electrode includes a channel passing through the electrode, and the electron beam is provided into the channel to generate the X-ray.