Ion Pump Electrode Segmentation for Vacuum Exhaust
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Solution Overview
Problem
Conventional ion pump systems have a saddle point where no effective magnetic field is present, limiting the effective use of electric and magnetic fields across the getter surface and thus reducing exhaust efficiency.
Innovation Solution
The use of a plurality of disc-shaped electrodes in both the inner and outer casings, with strategically positioned magnets, ensures that electric and magnetic fields are effectively utilized across the entire getter surface, eliminating saddle points and enhancing exhaust efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a magnet is provided in the inner casing and a magnet is provided in the outer casing (conventional configuration), then the structure is relatively simple, but a saddle point where no effective magnetic field is present is inevitably created, reducing exhaust efficiency
Solution Approach 1:
The patent divides the electrode system into multiple disc-shaped electrodes arranged in sequence between the inner and outer casings. Each electrode is positioned at a predetermined interval, creating multiple discrete magnetic field zones. This segmentation eliminates the saddle point by ensuring continuous magnetic field coverage across the entire getter surface, thereby improving exhaust efficiency without requiring a fundamentally different structural approach
Solution Approach 2:
The patent positions each disc-shaped electrode locally to create specific magnetic field zones. The electrodes are arranged such that the magnetic field is concentrated and effective in each local region between the inner and outer casings. This local optimization ensures that every portion of the getter surface receives adequate magnetic field exposure, eliminating the saddle point while maintaining a manageable structural complexity
2Productivity
If electrodes are provided only in conventional positions, then the structure is simpler, but no effective magnetic flux is present in portions where electrodes are provided, creating a saddle point
Solution Approach 1:
The patent introduces multiple disc-shaped electrodes positioned at predetermined intervals between the inner and outer casings. This segmentation of the electrode system creates multiple effective magnetic field zones, ensuring that magnetic flux is present in all portions of the getter surface. The segmented approach increases the number of electrodes but eliminates the saddle point, achieving the desired improvement in exhaust efficiency
Solution Approach 2:
The patent arranges electrodes in a multi-dimensional configuration between the inner and outer casings, extending the electrode system along the axial dimension. This dimensional arrangement ensures that magnetic field coverage is achieved throughout the entire volume, eliminating the saddle point that would exist in a single-plane electrode configuration
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 allows for improved exhaust efficiency by ensuring that electric and magnetic fields are utilized in all portions of the getter surface, effectively eliminating saddle points and enhancing gas evacuation capabilities.
Implementation Method 1
electric fields and magnetic fields in all portions of a getter surface
Implementation Method 2
a magnetic flux is generated between the outer circumferential electrode 21 and the inner circumferential electrode 22
Data Source
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AI summary
Disclosed is an ion pump system capable of efficaciously utilizing electrical fields and magnetic fields in all portions of a getter face, and thus of substantially improving exhaust efficiency. In particular, the present disclosure is based on the discovery that disposing a plurality of disc-shaped electrodes upon an internal casing (12) and further disposing a plurality of disc-shaped electrodes also upon an external casing (11) eliminates saddle points, allowing efficacious utilization of electrical fields and magnetic fields in all portions of the getter face, and thus substantially improving exhaust efficiency.