X-Ray Module Magnet Insulation for Stable Beam Deflection
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Solution Overview
Problem
In X-ray modules, the inefficiency in converting electron beams to X-rays results in significant heat generation, which can degrade the magnetic field of permanent magnets, causing electron beam deflection and blurring of images during continuous imaging, such as in CT scans.
Innovation Solution
Incorporating a heat insulating member with lower thermal conductivity than the permanent magnet between the magnet and the housing to suppress heat transfer, along with a heat radiating unit with higher thermal conductivity to manage heat effectively, ensuring stable X-ray output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the permanent magnet is used to deflect the electron beam, then the electron beam deflection is achieved, but the permanent magnet is heated by heat generated in the target, causing magnetic force decrease and position change of X-ray focal point
Solution Approach 1:
A heat insulating member is introduced as an intermediary between the permanent magnet and the housing to block heat transfer from the target to the permanent magnet. This mediator has low thermal conductivity and prevents thermal energy from reaching the magnet, thereby maintaining its magnetic force while still allowing the deflection function to operate.
Solution Approach 2:
The heat insulating member extracts or removes the harmful thermal energy from the path between the target and the permanent magnet. By placing the insulating member in this path, the heat generated in the target is prevented from reaching the permanent magnet, thus protecting the magnetic properties while maintaining the deflection capability.
2Reliability
If the heat insulating member is disposed between the permanent magnet and the housing, then the heat transfer to the permanent magnet is suppressed, but the device structure becomes more complex
Solution Approach 1:
The heat insulating member is designed to serve multiple functions: it provides thermal insulation to protect the permanent magnet, while also potentially serving as a mounting structure or support element within the deflection unit. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while maintaining reliability.
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 stabilizes X-ray output by preventing overheating of the permanent magnets, maintaining beam deflection accuracy and image clarity during prolonged imaging sessions.
Implementation Method 1
a heat insulating member disposed at least between the permanent magnet and the housing. A thermal conductivity of the heat insulating member is lower than a thermal conductivity of the permanent magnet
Implementation Method 2
a deflection unit including a permanent magnet and disposed outside the housing, to deflect the electron beam by means of a magnetic force of the permanent magnet
Implementation Method 3
a target disposed inside the housing and fixed to the housing, to generate an X-ray when the electron beam is incident on the target
Data Source
AI summary
An X-ray module includes; a housing; an electron gun that emits an electron beam inside the housing; a target disposed inside the housing and fixed to the housing, to generate an X-ray when the electron beam is incident on the target; a permanent magnet that is disposed outside the housing and deflects the electron beam by means of a magnetic force; and a heat radiating unit having a higher thermal conductivity than a thermal conductivity of the permanent magnet and thermally connected to the permanent magnet.