Compact ECR Ion Generator Ceramic Insulation
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Solution Overview
Problem
Existing electron cyclotron resonance ion generators are bulky, prone to Penning-type discharges, and have a risk of electrical breakdowns due to air gaps and complex electrode geometries, leading to unreliable ion beam extraction.
Innovation Solution
A compact ECR ion generator design with a metal tube and ceramic insulating structure, eliminating air gaps and simplifying electrode geometries, featuring a metal tube with integrated plasma and waveguide cavities, and a magnetic field generation system positioned directly within the plasma chamber to reduce discharge risks and enhance beam extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulating structure with air gap is used to electrically insulate the metal tube from the extraction means, then the device can maintain electrical insulation, but the device becomes bulky and air gaps increase the risk of electrical breakdown and Penning discharge
Solution Approach 1:
The invention removes the air gap between the insulating structure and the metal tube by using a ceramic tube that is in direct contact with both components. This extraction of the harmful air gap eliminates the volume occupied by gaps while maintaining electrical insulation through the ceramic material itself, thereby reducing device bulkiness while preserving insulation reliability.
Solution Approach 2:
The invention employs a ceramic tube as the insulating structure, which is a composite material combining electrical insulation properties with mechanical strength and vacuum compatibility. The ceramic material provides reliable electrical insulation without requiring air gaps, thus reducing device volume while maintaining insulation effectiveness and preventing Penning discharge.
2Reliability
If complex electrode geometries are used in the accelerating tube, then electrical breakdown risk is reduced, but the device complexity increases and Penning discharge risk remains
Solution Approach 1:
The invention applies local quality by providing electrical insulation specifically at the critical interface between the metal tube and extraction means using the ceramic tube. This localized insulation approach prevents electrical breakdown at the most vulnerable point without requiring complex electrode geometries throughout the entire accelerating tube, thereby reducing device complexity while maintaining reliability.
3Device complexity
If the magnetic field generation means are positioned away from the plasma chamber, then the device structure is simplified, but Penning discharge risk increases due to unfavorable electric and magnetic field line combinations
Solution Approach 1:
The invention merges the magnetic field generation means with the plasma chamber by positioning them in direct contact or close proximity. This merging ensures favorable combination of electric and magnetic field lines within the plasma chamber, preventing Penning discharge while maintaining relatively simple device structure. The integrated design achieves both reliability and structural simplicity.
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 design results in a more reliable and efficient ion beam extraction with reduced risk of Penning-type discharges and electrical breakdowns, achieving a more compact and efficient device with improved ion beam quality and reduced complexity.
Implementation Method 1
electron cyclotron resonance devices, also called ECR sources, are used to produce single-charged or multi-charged ions
Implementation Method 2
a plasma chamber intended to contain a plasma
Implementation Method 3
magnetic field generation means configured to generate a magnetic field in the plasma chamber
Implementation Method 4
extraction means arranged to extract ions from the plasma chamber
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to an electronic cyclotron resonance ion generator device comprising: - a metal tube (1) subjected to a first potential (V1) and pierced by: o a first cavity forming a plasma chamber (3) intended to contain a plasma; o a second cavity forming a waveguide (4) arranged to inject a high-frequency wave into the plasma chamber (3), - extraction means (12) comprising an upstream end (15) connected to the plasma chamber (3) and a downstream end (16) intended to be connected to an ion transport line (22), the connection flange (21) being subjected to a second potential (V2), - means for generating (8) a magnetic field, - a ceramic tube (17) in contact with the metal tube (1), the ceramic tube (17) surrounding the metal tube (1) and at least a part of the extraction means (12).