Wall-Anode GCC Ion Pump for Compact UHV Systems
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Solution Overview
Problem
Compact ultra-high vacuum (UHV) systems face challenges in maintaining ion-pump effectiveness due to the limitations of existing designs, which can lead to reduced pumping efficiency and increased complexity, especially when scaling down to smaller dimensions.
Innovation Solution
The use of a wall-anode design integrated into a Glass, Ceramic, or Crystalline (GCC) ion-pump housing, which allows for a larger Penning trap volume and improved robustness, enabling more effective ion pumping while maintaining a compact housing size, and eliminating the need for a suspension mechanism, thus enhancing pumping effectiveness and reducing the risk of short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact ion pump design is used, then the system size is reduced and portability is improved, but the Penning trap volume decreases leading to reduced pumping effectiveness
Solution Approach 1:
The anode is merged with the housing structure itself, where the housing walls form the anode surface. This integration eliminates the need for a separate suspended anode component and allows the Penning trap volume to maximize the available housing interior space, resolving the contradiction between compact housing size and effective trap volume
Solution Approach 2:
The housing serves multiple functions: it provides mechanical support, defines the vacuum chamber boundaries, and simultaneously acts as the anode electrode for the Penning trap. This multi-functionality allows the compact housing to maintain full pumping effectiveness without requiring additional components that would increase size
2Volume of stationary object
If a suspended anode design is used, then the Penning trap volume can be maintained, but the device complexity increases due to the suspension mechanism and the risk of short circuits increases
Solution Approach 1:
The suspension mechanism is completely removed from the design. The anode function is extracted from a separate suspended component and integrated directly into the housing structure, eliminating the complex suspension system while maintaining the Penning trap volume through optimized housing interior space
Solution Approach 2:
Instead of suspending the anode from the housing, the design inverts the relationship by making the housing itself the anode. This reversal eliminates the need for suspension mechanisms and electrical isolation structures, simplifying the device while maintaining functional volume
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
The wall-anode design in a GCC ion-pump housing increases the volume of the Penning trap, leading to improved ion pumping efficiency and robustness, allowing for more compact and reliable UHV systems with reduced maintenance needs and increased portability.
Implementation Method 1
The electric field gives rise to free electrons at a cathode and accelerates them toward an anode
Implementation Method 2
A cross product of the magnetic field with the current associated with the accelerating electrons produces a force orthogonal to the electron path
Implementation Method 3
A cross product of the magnetic field with the current associated with the accelerating electrons produces a force orthogonal to the electron path
Implementation Method 4
The resulting cloud of swirling electrons ionizes incident molecules, which are then accelerated by the electric fields so that they impact surfaces of getter material
Implementation Method 5
immobilizing the ions by sorbing (adsorbing or absorbing) them to a 'getter' material
Implementation Method 6
immobilizing the ions by sorbing (adsorbing or absorbing) them to a 'getter' material
Data Source
AI summary
An ultra-high vacuum (UHV) system includes a UHV cell and an ion pump to maintain the UHV in the UHV cell. The ion pump has a GCC (glass, ceramic, or crystalline) housing. An interior wall of the ion-pump housing serves as an anode or bears a coating that serves as an anode. At least one cathode is disposed with respect to the housing so that it can cooperate with the anode to form an electric field for establishing a Penning trap. The GCC housing defines a flow channel that extends radially through the anode so that a molecule can flow directly into the most ionizing region of a Penning trap.