X-ray Tube Focal Track Heat Management via Beam Deflection
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Solution Overview
Problem
A continuous presence of electrons on a focal track in X-ray devices leads to significant heat generation, potentially causing damage to the focal track.
Innovation Solution
The implementation of a rotating anode with a deflection device that deflects the electron beam onto two or more separate regions of the focal track at different times, allowing for the generation of X-rays with multiple focal spots, thereby distributing the heat load and preventing overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrons are continuously present on the same location of the focal track, then X-ray generation efficiency is improved, but heat accumulation causes damage to the focal track
Solution Approach 1:
The focal track is divided into multiple regions, and the electron beam is deflected to impinge on different regions at different times. This segmentation distributes the heat load across multiple areas rather than concentrating it on a single location, preventing overheating while maintaining continuous X-ray generation capability.
Solution Approach 2:
The electron beam is periodically deflected between different regions of the focal track using magnetic or electric fields. This periodic switching allows each region to cool down while the electron beam is directed to another region, enabling sustained high-power X-ray operation without thermal damage.
2Temperature
If a rotating anode is used to distribute heat, then heat management is improved, but the complexity of the X-ray tube increases
Solution Approach 1:
Instead of mechanically rotating the anode, the patent uses dynamic magnetic or electric fields to deflect the electron beam to different regions. This dynamic field approach achieves heat distribution without the mechanical complexity of a rotating anode, simplifying the overall tube structure while maintaining effective thermal management.
3Temperature
If the electron beam is deflected to multiple regions, then heat load distribution is improved, but the control system complexity increases
Solution Approach 1:
The system uses the electron beam's own magnetic or electric field interactions to achieve deflection and heat distribution. By leveraging the inherent properties of the electron beam and simple external field applications, the control system achieves heat load distribution without requiring complex multi-component control mechanisms.
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 solution effectively manages heat distribution across the focal track, preventing damage and enhancing the operational stability and efficiency of the X-ray generating tube by allowing X-rays to be generated with two or more focal spots at different times.
Implementation Method 1
A cathode is placed within the cathode cylinder. The cathode can include a filament that is connected to an electrical power source to generate electrons.
Implementation Method 2
An anode is placed in the anode housing spaced apart from the cathode. When the X-ray tube is energized, electrons are emitted from the cathode to a target portion of the anode (sometimes referred to as the 'focal track').
Implementation Method 3
The deflection device may provide a magnetic field or an electric field configured to deflect the electron beam.
Data Source
AI summary
A system and method for generating X-rays are disclosed. The method may include emitting an electron beam from a cathode to a focal track of a rotating target. The method may further include deflecting the electron beam onto a first region of the focal track at a first time, and deflecting the electron beam onto a second region of the focal track at a second time. The first region of the focal track may be separated from the second region of the focal track. The method may further include generating X-rays in response to the electron beam deflected onto the first region of the focal track or onto the second region of the focal track.