Rotating Anticathode Target for High Brightness X-ray Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional X-ray generating apparatuses face limitations in achieving high brightness due to the melting and splashing of the anticathode target, restricting the practical increase in X-ray brightness, and require a method to sustain high brightness over time while preventing target consumption.
Innovation Solution
The method involves irradiating an energy beam onto a rotating anticathode to set the vapor pressure at an equilibrium state of 0.1 Torr or more, utilizing centrifugal force to keep the heated portion in place, thereby increasing X-ray brightness and extending the apparatus's operational time without consuming the anticathode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the electric power is increased to increase the brightness of the X-ray, then the brightness is improved, but the target may be melted and splashed by the increased electron beam intensity per unit area
Solution Approach 1:
The invention transitions from a conventional planar target surface to a three-dimensional concave-convex structured target. By creating凹陷 portions (concave portions) with specific geometries on the target surface, the electron beam energy is distributed into the depth dimension of the concave regions rather than being concentrated on a flat surface. This dimensional transformation allows higher total power to be applied while maintaining acceptable power density on any single point of the target material.
Solution Approach 2:
The target surface is designed with non-uniform local structures including concave portions, convex portions, and ridges. Each local region has different geometric properties that affect heat distribution and material stability. The concave portions specifically are designed to contain and control the melted material, while convex portions and ridges provide structural support and heat dissipation pathways, creating locally optimized zones for different functions.
2Illumination intensity
If the electron beam area on the target is decreased to increase brightness, then the brightness is improved, but the target may be melted and splashed due to increased intensity per unit area
Solution Approach 1:
By introducing the depth dimension through concave portions, the effective target area increases without increasing the projected footprint. The electron beam can be focused to a small spot size to maintain high brightness, while the three-dimensional structure provides additional volume for heat absorption and material containment, preventing splashing even at high intensities.
Solution Approach 2:
The invention converts the harmful effect of melted target material into a beneficial feature. The concave portions are specifically designed to contain and control the melted material, transforming what would normally be a destructive splashing effect into a controlled molten state that actually enhances X-ray generation while preventing material loss and contamination.
3Illumination intensity
If the electron beam irradiating portion is heated to the melting point of the anticathode target to increase brightness, then the brightness is improved, but the partially melted portion may splash outward from the cylindrical portion
Solution Approach 1:
The invention directly addresses the material loss problem by designing the concave portions to contain and control the melted material. The geometric configuration of the concave regions with specific opening angles and depth-to-width ratios creates natural containment structures that utilize the centrifugal force and surface tension of the molten material to prevent splashing outward, while still allowing controlled ejection in the desired direction for X-ray generation.
Solution Approach 2:
By creating three-dimensional concave structures with controlled geometry, the invention adds the depth dimension to contain the melted material. The concave portions act as micro-containers that physically restrict the lateral movement of molten material, preventing it from splashing outward onto surrounding components while maintaining the high temperatures necessary for bright X-ray generation.
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 approach allows for the stable generation of X-rays with brightness three times higher than conventional methods for an extended period, with the X-ray generating apparatus capable of operating for several days without significant anticathode consumption, significantly exceeding theoretical operational limits.
Implementation Method 1
irradiating an energy beam onto a rotating anticathode so as to heat a portion irradiated by the energy beam
Implementation Method 2
generating an X-ray
Implementation Method 3
affecting a centrifugal force to the portion in a direction outward from a surface of the portion so as to keep the portion at the rotating anticathode
Data Source
AI summary
An energy beam is irradiated onto a rotating anticathode so as to heat a portion irradiated by the energy beam under the condition that a vapor pressure at equilibrium state of the portion is set to 0.1 Torr or more, thereby generating an X-ray. The portion irradiated by the energy beam is kept at the rotating anticathode by a centrifugal force to the portion it a direction outward from a surface of the portion.