Asymmetric Multipole Deflection in Rotary Piston X-Ray Sources
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Solution Overview
Problem
Conventional rotary piston X-ray sources experience a more inhomogeneous electron distribution on the focal track due to strong deflection by the deflection unit, leading to increased thermal load and reduced efficiency.
Innovation Solution
The rotary piston X-ray source incorporates a magnetic deflection unit with an asymmetric multipole configuration, where the central axis of the multipole and the axis of rotation span a surface, achieving a more homogeneous electron distribution by reducing power peaks and enhancing deflection strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional symmetric deflection unit with two quadrupoles is used in a rotary piston X-ray source, then the electrons can be deflected toward the focal track, but the electron distribution on the focal track becomes more inhomogeneous due to partial crossover of electron trajectories
Solution Approach 1:
The patent applies asymmetry by configuring the magnetic deflection unit with an asymmetric multipole arrangement where the central axis of the multipole and the axis of rotation span a surface (are not coincident). This asymmetric configuration prevents the partial crossover of electron trajectories that occurs in symmetric designs, thereby achieving more homogeneous electron distribution on the focal track while maintaining effective deflection capability.
2Device complexity
If the electron emitter is positioned centrally on the axis of rotation in a rotary piston X-ray source, then the structure is simplified, but the electrons must be deflected relatively strongly toward the off-center focal track, causing inhomogeneous electron distribution and increased thermal load
Solution Approach 1:
The patent changes the parameters of the magnetic deflection unit, specifically the multipole configuration and its orientation relative to the rotation axis. By adjusting the spatial relationship between the multipole central axis and the rotation axis (making them span a surface rather than coincide), the deflection characteristics are optimized to reduce electron trajectory crossover and achieve more uniform electron distribution, thereby reducing thermal load on the focal track.
3Device complexity
If a symmetric multipole configuration is used in the magnetic deflection unit, then the design is simpler, but it causes partial crossover of electron trajectories and more inhomogeneous electron distribution
Solution Approach 1:
The patent implements asymmetry in the magnetic deflection unit by positioning the multipole such that its central axis and the rotation axis span a surface (are not coincident). This asymmetric arrangement fundamentally changes the electron trajectory patterns, preventing the partial crossover effect that occurs in symmetric configurations and achieving superior electron distribution uniformity on the focal track.
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 results in a more homogeneous electron distribution, reducing thermal load and increasing the power and service life of the rotary piston X-ray source, while allowing for larger anodes with higher heat capacity.
Implementation Method 1
the magnetic deflection unit comprises at least one multipole and is disposed outside the rotary piston, wherein the at least one multipole has at least four magnetic poles which are disposed around the axis of rotation and comprise coil windings in each case
Data Source
AI summary
A rotary piston X-ray source including a housing, a rotary piston X-ray source, and a magnetic deflection unit. The rotary piston X-ray source is mounted inside the housing to be rotatable about an axis of rotation relative to the housing. The magnetic deflection unit includes at least one multipole and is disposed outside the rotary piston. The at least one multipole has at least four magnetic poles, which are disposed about the axis of rotation and include coil windings. The magnetic poles further define a multipole plane on which a central axis of the at least one multipole is perpendicularly centered, and the at least one multipole is arranged such that the central axis of the at least one multipole and the axis of rotation span a surface.