Electron Source Assembly Using Pressure Differential Ionization
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Solution Overview
Problem
Current analytical instruments require faster and more detailed information for sample analysis, particularly in security and military settings, where existing electron sources for ionization in mass spectrometry are not sufficient for rapid and precise identification of threats.
Innovation Solution
The development of electron source devices and assemblies with a cathode and anode configuration that utilize a pressure differential and conductive lenses to facilitate electron generation and fluid flow, enabling efficient ionization for mass spectrometry and ion mobility spectroscopy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electron sources are used in mass spectrometry, then the analysis can be performed, but the speed and detail of sample analysis are insufficient for rapid threat identification
Solution Approach 1:
The patent applies parameter changes by utilizing a pressure differential between the cathode and anode members to control electron generation and fluid flow. By adjusting pressure parameters, the system optimizes both the speed of electron generation and the precision of ionization, resolving the contradiction between analysis speed and detection detail
Solution Approach 2:
The patent implements dynamics through movable components including the pressure differential mechanism and adjustable lens positions. The lens centers can be offset from the cathode center by controlled distances, allowing dynamic optimization of electron trajectory and ionization efficiency to simultaneously improve analysis speed and precision
2Productivity
If a pressure differential is applied between cathode and anode to facilitate fluid flow, then electron generation efficiency improves, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the cathode and anode members, which simultaneously serve as both electrodes for electron generation and fluid conduits for pressure differential flow. This integration improves electron generation efficiency while minimizing additional structural complexity
Solution Approach 2:
The cathode and anode members are designed with multi-functionality, acting as both electrical electrodes and fluid transport channels. This universal design allows the pressure differential to control both electron emission and fluid flow without requiring separate mechanisms, thereby improving efficiency without proportionally increasing complexity
3Measurement precision
If lens openings are offset from the center to improve electron focusing, then ionization precision improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent deliberately employs asymmetry by offsetting the lens centers from the cathode center by specific distances. This asymmetric configuration optimizes electron focusing and ionization precision. The design accepts increased manufacturing precision requirements as a trade-off for achieving superior analytical performance in threat identification
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
Enhances the speed and detail of sample analysis by providing efficient electron generation for ionization, improving the detection capabilities in mass spectrometry and ion mobility spectrometry, particularly in identifying complex substances like volatile compounds and proteins.
Implementation Method 1
a pressure differential extending between the cathode member and the anode member, the pressure differential facilitating fluid flow through the cathode and anode
Implementation Method 2
a lens conductively associated with the cathode member, the lens defining at least one opening offset from the center
Implementation Method 3
electron source devices... for generating electrons... used to facilitate spectroscopy, such as mass spectrometry
Data Source
AI summary
The present disclosure provides electron source devices, electron source assemblies, and/or methods for generating electrons. The generated electrons can be used to facilitate spectroscopy, such as mass spectrometry, including mass selection or ion mobility.