Field Emission X-Ray Source Layout for High-Voltage Insulation
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Solution Overview
Problem
Conventional field emission X-ray source devices face issues with insulation breakdown due to high voltage exposure, reduced durability, and difficulty in manufacturing, particularly due to the vulnerability of the gate electrode and limited insulating distance between the gate and anode electrodes.
Innovation Solution
The design includes a longer insulating distance between the gate and anode electrodes, with the gate and cathode electrodes manufactured as modules, minimizing exposure of the cathode electrode and using a modular structure to enhance insulation and manufacturing ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the gate electrode is placed close to the cathode electrode for compact design, then device size is reduced, but insulation durability deteriorates due to high voltage exposure
Solution Approach 1:
An insulating housing is introduced as an intermediary component between the gate electrode and anode electrode. The housing is made of insulating material and has a specific structure that provides adequate insulation distance while allowing the gate electrode to be positioned relatively close to the cathode electrode, thus maintaining compact device size while ensuring insulation durability against high voltage exposure.
2Reliability
If the insulating distance between gate and anode electrodes is increased for better insulation, then insulation durability is improved, but device complexity increases
Solution Approach 1:
The insulating housing serves multiple functions simultaneously: it provides the necessary insulation distance between the gate electrode and anode electrode for high voltage isolation, acts as a structural support for mounting the electrodes, and contributes to the overall compact design by efficiently arranging the internal components. This multi-functionality improves insulation durability without proportionally increasing device complexity.
3Ease of manufacture
If the cathode electrode is exposed for easier connection, then ease of manufacture is improved, but insulation performance deteriorates
Solution Approach 1:
The insulating housing provides localized insulation coverage at critical areas where high voltage isolation is needed, particularly around the gate electrode and its connection points. The housing may have openings or exposed regions only where necessary for connections, while maintaining full insulation coverage in areas where electrical isolation is critical, thus achieving both ease of manufacture and maintained insulation performance.
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 improves insulation durability and manufacturing efficiency by extending the insulating distance and reducing exposure of the cathode electrode, while maintaining high electron directionality and X-ray emission efficiency.
Implementation Method 1
the field emission X-ray source device uses an electric field emission method as an electron emission mechanism
Implementation Method 2
the accelerated electrons are in collision with an X-ray target provided on the anode electrode side to emit X-rays
Data Source
AI summary
Proposed is a field emission X-ray source device including an insulating housing, an anode electrode, a cathode electrode, a gate electrode, an electronic emitter, and a target. The insulating housing extends in a tube shape. The anode electrode covers a first side of the insulating housing. The cathode electrode is placed at a second side of the insulating housing and faces the anode electrode. The gate electrode covers the second side of the insulating housing, and has an opening formed in the direction of the second side. The electronic emitter is provided on the cathode electrode and is configured to emit an electron beam toward the anode electrode. The target is provided on the anode electrode and is placed to face the electronic emitter, and enables X-rays to be generated by collision with the electron beam.