X-ray Tube Electron Gun Offset for Short FOD
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional X-ray tubes face challenges in shortening the Focus Object Distance (FOD) while maintaining a desired electron gun output, leading to difficulties in precision and efficiency due to the need for a compact electron gun housing unit, which complicates manufacturing and assembly.
Innovation Solution
The X-ray tube design features an electron gun housing unit with its centerline offset towards the X-ray emission window, allowing for a shorter FOD without requiring a compact electron gun, thereby improving magnification factor and assembly efficiency by positioning the electron gun closer to the emission window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the electron gun housing unit is made compact to shorten FOD, then the FOD is shortened and magnification factor is improved, but manufacturing precision and voltage withstand performance deteriorate
Solution Approach 1:
The patent repositions the electron gun housing unit from a conventional axial alignment to an offset position relative to the target housing unit. This spatial reconfiguration allows the electron gun to be located closer to the X-ray emission window without requiring the electron gun housing unit itself to be compact, thereby shortening FOD while preserving adequate internal space for manufacturing precision and voltage insulation.
2Length of stationary object
If the electron gun housing unit is made compact to shorten FOD, then the FOD is shortened, but device complexity and assembly difficulty increase
Solution Approach 1:
By moving the electron gun housing unit to an offset position rather than compacting it, the patent creates sufficient internal space within the housing unit. This adequate space simplifies the assembly process by allowing proper positioning and connection of electron gun components without the constraints of a compact design.
3Length of stationary object
If the electron gun housing unit is made compact to shorten FOD, then the FOD is shortened, but productivity and working efficiency deteriorate
Solution Approach 1:
The offset positioning of the electron gun housing unit provides adequate internal space that facilitates efficient assembly operations. Workers can access and assemble components more easily without the spatial constraints of a compact design, thereby maintaining high working efficiency while achieving the desired short FOD.
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 enables a shorter FOD, enhancing the magnification factor and precision of nondestructive inspections while simplifying the assembly process and maintaining adequate electron gun performance.
Implementation Method 1
electrons, emitted from an electron gun, collide with the target and X-rays are generated from the target
Implementation Method 2
X-rays are generated by making electrons, emitted from an electron gun, incident on a target
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to an X-ray tube, having a structure for realizing improvement of a magnification factor of a magnified transmission image, and an X-ray source that includes the X-ray tube. The X-ray tube includes: a target housing unit, housing an X-ray target; and an electron gun housing unit, one end of which is mounted to a side wall portion of the target housing unit. The electron gun housing unit is disposed so that a tube axis thereof intersects a tube axis of the target housing unit. The electron gun housing unit holds an electron gun while a center of an electron emission exit of the electron gun is shifted more toward an X-ray emission window side, disposed at one end of the side wall portion of the target housing unit, than the tube axis of the electron gun housing unit. By this configuration, a distance (FOD) between the X-ray emission window and the X-ray target can be shortened while maintaining an adequate electron gun output.